CN115268011B - Gravity unloading device for reflector - Google Patents
Gravity unloading device for reflector Download PDFInfo
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- CN115268011B CN115268011B CN202211195802.3A CN202211195802A CN115268011B CN 115268011 B CN115268011 B CN 115268011B CN 202211195802 A CN202211195802 A CN 202211195802A CN 115268011 B CN115268011 B CN 115268011B
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- top seat
- reflector
- gravity unloading
- threaded
- sliding rod
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/18—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors
- G02B7/182—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors
- G02B7/183—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors specially adapted for very large mirrors, e.g. for astronomy, or solar concentrators
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/18—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors
- G02B7/182—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors
- G02B7/198—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors with means for adjusting the mirror relative to its support
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Astronomy & Astrophysics (AREA)
- Sustainable Development (AREA)
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Abstract
The invention relates to the technical field of vacuum gravity unloading, and particularly provides a gravity unloading device of a reflector, which comprises: the force sensor is attached to the back face of the reflector, the force sensor is fixed to the top seat assembly, the top seat assembly is connected with the ejector rod assembly, the ejector rod assembly is used for driving the force sensor and the top seat assembly to apply force to the reflector, the support is a fixing part of a gravity unloading device of the reflector and provides an external installation interface, and the change of the force of gravity unloading is achieved through the lever principle by the aid of the thread compression rod and the weight assembly. The invention is applied to the field of reflector optical axis vertical detection, does not need to be assembled with a reflector, is an independent device, reduces complex work such as installation and adjustment of the reflector, adopts a pure mechanical structure, is suitable for vacuum and other complex environments, and has the advantages of high space utilization rate, small volume, convenient movement, simple operation and the like.
Description
Technical Field
The invention relates to the technical field of vacuum gravity unloading, and particularly provides a gravity unloading device suitable for a reflector in a vacuum environment.
Background
Along with the trend development of space remote sensors to large calibers, the calibers of the reflectors are larger and larger, the precision requirement is higher and higher, the influence of gravity and air disturbance on the detection of the reflectors is more and more obvious, and in order to eliminate the influence of gravity and air disturbance factors, the large-caliber reflectors need a gravity unloading device which can be used in a detection mode in a vacuum environment.
The existing reflector gravity unloading device mainly adopts air pressure or hydraulic drive and is applied to a reflector processing and grinding stage and a reflector detection stage, but the device cannot be used in a vacuum environment.
Several existing gravity unloading devices that can be used in a vacuum environment mainly include the following disadvantages:
1. the gravity unloading device supported by a mercury belt mode is adopted, but the unloading force of the device is not uniform, and new reflector stress deformation is easily introduced.
2. The gravity unloading device combining the mercury belt and the pulley is large in size, is a device for self-unloading by utilizing the gravity of the reflecting mirror, does not consider the friction force of a mechanism, and is poor in gravity unloading precision.
3. A gravity unloading device with a horizontal optical axis at least needs to detect two states, and the detection time is long.
4. The gravity unloading device and the reflecting mirror are assembled together, so that the device has strong coupling and complex assembly and adjustment.
Disclosure of Invention
In order to solve the problems, the invention provides a gravity unloading device for the reflector, which realizes gravity unloading of the reflector through a mechanical structure and ensures that the gravity unloading device can work in a vacuum environment.
The invention provides a gravity unloading device of a reflector, comprising: the device comprises a force sensor, a top seat component, a top rod component, a support, a threaded pressure rod and a weight component;
the force sensor is fixed on the top seat component;
the ejector rod assembly comprises an upper sliding rod, an upper sliding seat, a connecting frame, a connecting piece, a lower sliding rod and a lower sliding seat;
the upper sliding seat is arranged at the upper end of the bracket, the upper sliding rod penetrates through the upper sliding seat, the upper end of the upper sliding rod is rotatably connected with the top seat assembly, and the lower end of the upper sliding rod is fixedly connected to the upper part of the connecting frame; the upper end of the lower sliding rod is fixedly connected to the lower part of the connecting frame, and the connecting piece is fixed in the connecting frame through a rotating shaft; the lower end of the lower sliding rod penetrates through the lower sliding seat which is fixedly connected with the lower end of the bracket;
the screw thread depression bar includes screw thread section and optical axis section, and the optical axis section passes through fulcrum axle and is connected with the support rotation, and the tip of optical axis section passes through the pivot and rotates with connection frame and connecting piece to be connected.
Preferably, the lower end of the support is provided with an ear plate, and the ear plate is provided with a fixing hole for fixing the gravity unloading device of the reflector.
Preferably, the weight is removable and replaceable.
Preferably, the weight assembly comprises a threaded mandrel and a weight block; the threaded mandrel is engaged with the threaded pressure rod through threads.
Preferably, the top seat assembly comprises a top seat bearing seat, a top seat bearing pressing ring and a top seat bearing clamping ring, the top seat bearing is fixedly connected in the top seat bearing seat through the top seat bearing pressing ring, and the upper end of the upper sliding rod is fixedly connected with the top seat bearing through the top seat bearing clamping ring.
Compared with the prior art, the invention can obtain the following beneficial effects:
1. the invention adopts a pure mechanical structure and is suitable for vacuum and other complex environments.
2. The invention has the advantages of high space utilization rate, small volume, convenient movement and simple operation.
3. The invention is applied to the field of reflector optical axis vertical detection, does not need to be assembled with the reflector, is an independent device, and reduces the complex work of reflector installation and adjustment and the like.
Drawings
FIG. 1 is a schematic structural diagram of a gravity unloading apparatus for a reflector provided in accordance with an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a top mount assembly provided in accordance with an embodiment of the present invention;
FIG. 3 is a cross-sectional side view of a gravity unloading apparatus for a mirror provided in accordance with an embodiment of the present invention;
FIG. 4 is a front view of a gravity unloading apparatus for mirrors provided in accordance with an embodiment of the present invention;
fig. 5 is a cross-sectional view of a threaded compression bar and weight assembly provided in accordance with an embodiment of the present invention;
fig. 6 is a schematic diagram of an alternative configuration provided in accordance with the present invention.
The reference numerals in fig. 1 to 5 include:
the force sensor comprises a force sensor 1, a top seat component 2, a top seat bearing seat 21, a top seat bearing 22, a top seat bearing clamping ring 23, a top seat bearing retainer ring 24, a mandril component 3, an upper sliding rod 31, an upper sliding seat 32, a connecting frame 33, a connecting piece 34, a lower sliding rod 35, a lower sliding seat 36, a connecting shaft 37, a support 4, a threaded pressure rod 5, a weight component 6, a threaded mandrel 61, a balancing weight 62, a weight bearing seat 63, a weight ball bearing 64, a weight bearing clamping ring 65, a weight bearing retainer ring 66, a fulcrum shaft 7 and a lug 8;
the reference numerals in fig. 6 include:
shifting fork structure 5'External connecting piece 34'。
Detailed Description
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the following description, the same reference numerals are used for the same blocks. In the case of the same reference numerals, their names and functions are also the same. Therefore, detailed description thereof will not be repeated.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention.
Fig. 1 shows a structure of a gravity unloading apparatus of a mirror provided according to an embodiment of the present invention.
As shown in fig. 1, the gravity unloading apparatus of the mirror includes: the device comprises a force sensor 1, a top seat component 2, a top rod component 3, a support 4, a threaded pressure rod 5, a weight component 6 and a fulcrum shaft 7.
The support 4 is a fixing piece of the gravity unloading device of the reflector, an external installation interface is provided, a lug 8 is arranged at the lower end of the support 4, the gravity unloading device of the reflector is fixed in an application scene through a bolt, and a through hole is formed in the middle of the support 4 and used for being connected with the fulcrum shaft 7.
The threaded compression bar 5 comprises a threaded section and an optical axis section, the optical axis section on the threaded compression bar 5 is provided with a first through hole and a second through hole, other positions are of a threaded structure, namely the threaded section, the threaded compression bar 5 is in threaded engagement with the weight assembly 6 for adjusting the position of the weight assembly 6, and the change of the gravity unloading force is realized through the lever principle.
Fig. 2 illustrates a sectional structure of a top mount assembly provided according to an embodiment of the present invention.
As shown in fig. 2, the top seat assembly 2 includes a top seat bearing seat 21, a top seat bearing 22, a top seat bearing clamping ring 23 and a top seat bearing clamping ring 24, and the top seat bearing 22 may be a ball bearing or a self-aligning bearing. The top seat bearing 22 is fixedly connected in the top seat bearing seat 21 through a top seat bearing clamping ring 23, the upper end of the upper sliding rod 31 is fixedly connected with the top seat bearing 22 through a top seat bearing clamping ring 24, the top seat bearing 22 ensures that only the top force or pressure action along the normal direction of the contact surface exists between the force sensor 1 and the reflector, and the gravity unloading mechanism of the reflector cannot generate new stress influence on the reflector.
Fig. 3 shows a cross-sectional structure of a side of the gravity unloading apparatus of the mirror provided according to the embodiment of the present invention.
Fig. 4 shows a front structure of the gravity unloading apparatus of the mirror provided according to the embodiment of the present invention.
As shown in fig. 3 and 4, the push rod assembly 3 includes an upper slide rod 31, an upper slide seat 32, a connecting frame 33, a connecting piece 34, a lower slide rod 35, a lower slide seat 36 and a connecting shaft 37, and the upper slide seat 32 and the lower slide seat 36 may adopt a linear bearing, a self-lubricating copper sleeve or a polytetrafluoroethylene sleeve. The upper sliding rod 31 passes through the upper sliding seat 32, and the upper sliding seat 32 is fixed in a clamping groove formed at the upper end of the bracket 4. The upper end of the upper sliding rod 31 is connected with the top seat assembly 2 through the top seat bearing 22, and the lower end of the upper sliding rod 31 is fixedly connected with the upper part of the connecting frame 33; the upper end of the lower sliding rod 35 is fixedly connected to the lower portion of the connection frame 33. A pair of through holes are formed in the lower portion of the connecting frame 33, the connecting shaft 37 penetrates through the pair of through holes, and the connecting piece 34 is connected with the connecting frame 33 through the connecting shaft 37; the lower end of the lower sliding rod 35 passes through the lower sliding seat 36, and the lower sliding seat 36 is fixed in an inverted clamping groove formed in the lower part of the bracket 4.
The lower part of the bracket 4 is provided with an inverted clamping groove for connecting a lower sliding seat 36 of the mandril component 3; the upper part of the bracket 4 is provided with a right-positioned clamping groove for connecting with an upper sliding seat 32 of the mandril component 3. The middle position of the bracket 4 is provided with a through hole, the fulcrum shaft 7 passes through the through hole and a second through hole on the threaded compression bar 5, and the first through hole is used for being connected with a connecting piece 34.
Fig. 5 shows a cross-sectional structure of a threaded strut and weight assembly provided in accordance with an embodiment of the present invention.
As shown in fig. 5, the weight assembly 6 comprises: the weight bearing comprises a threaded mandrel 61, a balancing weight 62, a weight bearing seat 63, a weight ball bearing 64, a weight bearing clamping ring 65 and a weight bearing clamping ring 66.
Fix weight ball bearing 64 in weight bearing seat 63 through weight bearing clamping ring 65, through weight bearing rand 66 with weight ball bearing 64 and screw mandrel 61 fixed connection, balancing weight 62 passes through threaded connection in the lower part of weight bearing seat 63, and balancing weight 62 accessible is unscrewed and the screw of screwing is dismantled and is changed and the installation. The threaded compression bar 5 is connected with the weight component 6 through a threaded mandrel 61, the threaded mandrel 61 is in threaded engagement with the threaded compression bar 5, and the weight component 6 integrally moves linearly along the threaded compression bar 5 by rotating the threaded mandrel 61.
In use, the lever principle and the transmission of force are explained as follows: the weight component 6 pulls the threaded pressure lever 5 due to gravity, the threaded pressure lever 5 rotates under the action of the fulcrum shaft 7 and the weight component 6, upward pulling force can be generated at one end of the threaded pressure lever 5 and one end of the connecting piece 34, the pulling force is transmitted to the connecting piece 34, and under the limiting action of the connecting shaft 37, the upper sliding rod 31 and the lower sliding rod 35, the ejector rod component 3 converts the transmitted pulling force into force pushing the force sensor 1 and the top seat component 2 upwards. By rotating the threaded spindle 61, the position of the weight assembly 6 on the threaded strut 5 is adjusted, so that the force output by the present invention reaches a desired magnitude, and the force output capability of the present invention can be further improved by replacing the counterweight block 62.
It should be noted that: the fulcrum shaft 7 and the connecting shaft 37 in the invention can be designed into a shafting structure and used for installing a bearing in a through hole penetrating through the fulcrum shaft 7 and the connecting shaft 37, and the design has smaller rotating resistance.
It should be noted that: fig. 6 shows an alternative structure provided by the present invention, as shown in fig. 6, in the alternative structure of the present invention, the upper sliding rod 31, the connecting frame 33 and the lower sliding rod 35 can be replaced by optical axis structures, and the connecting piece 34 is replaced by a larger external connecting piece 34'And is connected with the outer side of the optical axis, and the thread pressure lever 5 is replaced by a shifting fork structure 5'And the shifting fork structure 5 is driven by a rotating shaft'Respectively connected with the bracket 4 and an external connecting piece. Other parts of the replacement structure are the same as the mechanical structure and the working process in the embodiment, and are not described herein. This alternative configuration is the same mechanical principle as the gravity unloading device of the mirror in the embodiment.
The invention has been applied to the vacuum detection of the radioactive mirror of the space remote sensing camera, the working state is good, and all indexes can meet the use requirements.
While embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are exemplary and should not be taken as limiting the invention. Variations, modifications, substitutions and alterations of the above-described embodiments may be made by those of ordinary skill in the art without departing from the scope of the present invention.
The above embodiments of the present invention should not be construed as limiting the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the protection scope of the claims of the present invention.
Claims (4)
1. A gravity unloading apparatus for a mirror, comprising: the device comprises a force sensor, a top seat component, a top rod component, a support, a threaded pressure rod and a weight component;
the force sensor is fixed on the top seat assembly, the top seat assembly comprises a top seat bearing block, a top seat bearing pressing ring and a top seat bearing clamping ring, the top seat bearing is fixedly connected in the top seat bearing block through the top seat bearing pressing ring, and the upper end of the upper sliding rod is fixedly connected with the top seat bearing through the top seat bearing clamping ring;
the ejector rod assembly comprises an upper sliding rod, an upper sliding seat, a connecting frame, a connecting piece, a lower sliding rod, a lower sliding seat and a connecting shaft;
the upper sliding seat is mounted at the upper end of the support, the upper sliding rod penetrates through the upper sliding seat, the upper end of the upper sliding rod is rotatably connected with the top seat assembly, and the lower end of the upper sliding rod is fixedly connected to the upper part of the connecting frame; the upper end of the lower sliding rod is fixedly connected to the lower part of the connecting frame, and the lower end of the connecting piece is fixed in the connecting frame through the connecting shaft; the lower end of the lower sliding rod penetrates through the lower sliding seat, and the lower sliding seat is fixedly connected to the lower end of the support;
the threaded compression bar comprises a threaded section and an optical axis section, a through hole is formed in the middle of the support, the fulcrum shaft penetrates through the through hole to be connected to the support, the optical axis section is rotatably connected with the support through the fulcrum shaft, and the end of the optical axis section is rotatably connected with the connecting frame and the connecting piece through a rotating shaft.
2. The gravity unloading device for reflector mirrors as claimed in claim 1, wherein the lower end of the bracket is provided with a lug, and the lug is provided with a fixing hole for fixing the gravity unloading device for reflector mirrors.
3. The mirror gravity unloading device of claim 1, wherein the weight assembly comprises a threaded spindle and a counterweight; the threaded mandrel is in threaded engagement with the threaded pressure rod.
4. The gravity unloading apparatus for mirrors of claim 3, wherein said weight is removable and replaceable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211195802.3A CN115268011B (en) | 2022-09-29 | 2022-09-29 | Gravity unloading device for reflector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211195802.3A CN115268011B (en) | 2022-09-29 | 2022-09-29 | Gravity unloading device for reflector |
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| Publication Number | Publication Date |
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| CN115268011A CN115268011A (en) | 2022-11-01 |
| CN115268011B true CN115268011B (en) | 2022-12-09 |
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| CN202211195802.3A Active CN115268011B (en) | 2022-09-29 | 2022-09-29 | Gravity unloading device for reflector |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116500748B (en) * | 2023-04-28 | 2024-05-10 | 中国科学院长春光学精密机械与物理研究所 | Gravity unloading mechanism for reflecting mirror |
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