Reflector supporting device

Abstract

The invention relates to the technical field of reflector supporting, in particular to a reflector supporting device which comprises a base and a mandrel, the base comprises an inner ring and an outer ring, the mandrel penetrates through a reflector to be connected with the inner ring, a circle of flange is arranged on the side, close to the mirror surface of the reflector, of the mandrel, and a plurality of mandrel glue injection holes are formed in the flange and used for injecting glue to the inner surface of the reflector. The outer ring is opposite to the bottom face of the reflector, a plurality of first side check blocks and second side check blocks are arranged on the periphery of the outer ring in the circumferential direction, a plurality of first glue injection holes are formed in the first side check blocks, at least one second glue injection hole is formed in the second side check blocks, and the first glue injection holes and the second glue injection holes are used for injecting glue to the outer surface of the reflector. A mandrel pad is arranged between the mandrel and the reflector, and a base pad is arranged between the base and the reflector. According to the supporting device, the assembling stress is reduced to the maximum extent while the mirror body is fixed, and the stability and precision of the reflecting mirror are guaranteed in all directions.

Description

Technical Field

[0001] This invention relates to the field of mirror support technology, and specifically provides a mirror support device. Background Technology

[0002] Space mirrors are crucial components of optical cameras, and their surface accuracy directly impacts image quality. When a space mirror transitions from its ground-based state to its on-orbit operational state, it must withstand the mechanical stresses of the launch phase, the unloading of ground gravity under microgravity conditions, and the complex thermal environment of space. Therefore, the design of space mirror assemblies must ensure compliance with design specifications such as structural stiffness, thermal stability, and surface accuracy, placing high demands on the mirror's support structure.

[0003] Typically, due to assembly stress, the surface profile of the mirror body and its support will degrade to some extent after assembly, especially for mirror materials with relatively poor stability such as microcrystalline and fused silica. In practical engineering, to ensure the surface accuracy of the mirror, the support is usually assembled before the mirror is coated; if the surface profile degrades, the mirror is processed with the support in place, and the mirror coating is performed only after the surface profile meets the requirements. However, some coating processes do not allow for the presence of metal supports, requiring the support to be assembled after the mirror coating is completed. Therefore, a flexible support system with good performance and low external stress can undoubtedly further ensure the surface accuracy of mirror materials with relatively poor stability. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a reflector support device. A polytetrafluoroethylene (PTFE) pad is placed between the support device and the reflector, and adhesive is injected onto the inner and outer surfaces of the reflector. This reduces the assembly stress of the reflector and improves the surface accuracy and stability of the reflector.

[0005] The mirror support device provided by the present invention includes: The reflector, the base, and the spindle; the base includes an inner ring and an outer ring. The reflector has a through hole in the center and the bottom surface of the reflector protrudes outward to form a tail end; The mandrel passes through the reflector and connects to the inner ring; a flange is provided on the side of the mandrel near the reflector surface; multiple mandrel injection holes are provided on the flange for injecting glue into the inner surface of the tail end; The outer ring faces the bottom surface of the reflector. An outer wall is provided around the tail end in the outer circumference of the outer ring. Multiple first side blocks and second side blocks are provided on the outer wall. Multiple first glue injection holes are provided on the first side blocks, and at least one second glue injection hole is provided on the second side blocks. The first glue injection holes and the second glue injection holes are used to inject glue into the outer surface of the tail end. A spindle pad is provided between the spindle and the reflector; a base pad is provided between the base and the reflector.

[0006] Preferably, multiple connecting ends are evenly arranged between the inner ring and the outer ring for connecting the inner ring and the outer ring.

[0007] Preferably, multiple mandrel injection holes are evenly distributed on the flange; the number of mandrel injection holes is 8.

[0008] Preferably, a plurality of third injection holes are evenly provided on the outer wall; the number of third injection holes is 24.

[0009] Preferably, the outer wall partially protrudes outward to form a plurality of first side blocks and a plurality of second side blocks, the first side blocks being provided with a plurality of first glue injection holes, and the second side blocks being provided with at least one second glue injection hole.

[0010] Preferably, the mandrel pad is L-shaped, with one end placed between the flange and the reflector, and the other end placed between the outer surface of the mandrel and the reflector.

[0011] Preferably, the base pad is fan-shaped and is positioned between the common surface of the first side block and the bottom surface of the reflector and the base.

[0012] Preferably, the second side block is provided with an extension end, and each extension end is provided with a set of mounting holes, through which the reflector support device is installed on the working surface; each extension end 211 is also provided with multiple gaps, the gaps providing flexibility.

[0013] Preferably, there is a gap between the mandrel and the inner surface of the tail end to accommodate the mandrel pad and adhesive; there is a gap between the base and the bottom surface of the reflector to accommodate the base pad and adhesive.

[0014] Preferably, the spindle pad and base pad are not subjected to external forces and are used for load limiting during the launch phase; the spindle pad and base pad are inactive after the reflector support device is in orbit.

[0015] Compared with the prior art, the present invention can achieve the following beneficial effects: This invention provides a mirror support device. In terms of assembly, the mirror does not directly contact the support device, effectively reducing assembly stress between the support and the mirror, ensuring the mirror's surface accuracy, and breaking the limitation that support assembly is restricted to before mirror coating. A polytetrafluoroethylene (PTFE) gasket is placed between the mirror and the support device, and then glued in place. In terms of performance assurance, this reduces the rigid displacement of the mirror under gravity loads, mitigates the adverse effects of temperature loads and assembly errors on surface accuracy, allowing the mirror to maintain good overall performance. It also effectively reduces the magnification of the mirror during the emission phase. From a structural and cost perspective, the support device of this invention has a clear mechanism, simple structure, and low cost. In terms of applicability, it can be widely used for mirrors of different diameters (< φ300mm) and different materials, especially suitable for mirrors with poor stability that require mirror support assembly after coating. In addition, Invar steel is used for the base and mandrel to match the linear expansion coefficient of the mirror body, preventing additional stress introduced by temperature changes; polytetrafluoroethylene gaskets are used to isolate the metal support from the mirror, and the mandrel does not apply external force to the mirror body to achieve amplitude limiting during the launch phase; glue is injected into the radial gap between the base and the mirror to minimize assembly stress while fixing the mirror body, thus ensuring the stability and accuracy of the mirror in all aspects. Attached Figure Description

[0016] Figure 1 This is a front view of the reflector and reflector support device provided according to an embodiment of the present invention; Figure 2 This is a left view of the reflector and reflector support device provided according to an embodiment of the present invention; Figure 3 This is a partial enlarged view of the left side of the reflector and reflector support device provided according to an embodiment of the present invention; Figure 4 This is a rear view of the reflector and reflector support device provided according to an embodiment of the present invention. The reference numerals in the figures include: 1. Reflector, 12. Tail end, 2. Base, 21. Outer ring, 21. Extension end, 211. Mounting hole, 2111. Gap, 2112. Hole, 212. Inner ring, 22. Connecting hole, 221. Connecting end, 23. Outer wall, 24. First side block, 241. Second side block, 242. Mandrel, 3. Flange, 31. Mandrel injection hole, 32. Mandrel pad, 4. Base pad, 5. First injection hole, 6. Second injection hole, 7. Reflector mounting surface A, Base pad mounting surface B, Mandrel positioning surface C, Mandrel mounting surface D, Gap between mandrel and mandrel pad E, Gap between mandrel and reflector F. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and do not constitute a limitation thereof. Similar elements in different embodiments are referred to by associated similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the invention. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, some operations related to the invention are not shown or described in the specification. This is to avoid obscuring the core parts of the invention with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in this invention can be combined to form various implementations. Furthermore, the order of the steps or actions in the method description can be changed or adjusted in a manner readily apparent to those skilled in the art. Therefore, the various orders in the specification and drawings are merely for the clear description of a particular embodiment and do not imply a mandatory order, unless otherwise stated that a particular order must be followed.

[0019] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] The invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] like Figures 1 to 4 As shown, the present invention provides a mirror support device for supporting a mirror 1. The mirror 1 has a through hole at its center, and the bottom surface of the mirror 1 protrudes outward to form a tail end 12. The tail end 12 is connected to the support device, and the diameter of the tail end 12 is smaller than the diameter of the mirror 1. The specific structure of the support device is as follows: The support device includes a base 2 and a spindle 3. The base 2 includes an inner ring 22 and an outer ring 21. A through hole penetrating the surface and bottom of the reflector 1 is located at the center of the reflector 1. The spindle 3 is disposed in this through hole. Multiple connecting holes 221 are provided on the inner ring 22, through which the spindle 3 is connected to the inner ring 22 of the base 2, thus connecting the base 2 and the spindle 3. In this embodiment of the invention, there are three sets of connecting holes 221, evenly arranged on the inner ring 22, with each set containing two connecting holes 221.

[0023] The mandrel 3 passes through a through-hole and connects to the inner ring 22 via the reflector 1. A gap exists between the outer surface of the mandrel 3 and the inner surface of the through-hole in the reflector 1. A flange 31 is provided on the mandrel 3 near the reflector surface. The flange 31 has multiple mandrel injection holes 32 for injecting adhesive into the gap between the outer surface of the mandrel 3 and the inner surface of the through-hole in the reflector 1. In this embodiment, there are eight mandrel injection holes 32, evenly distributed on the flange 31. The mandrel 3 does not apply external force to the reflector 1 and is used for limiting the amplitude during the payload launch phase.

[0024] The inner ring 22 is provided with multiple connecting ends 23. The multiple connecting ends 23 are of the same shape and size and are evenly distributed circumferentially on the outer side of the inner ring 22. The multiple connecting ends 23 are integral with the inner ring 22 and are fan-shaped. In this embodiment of the invention, there are 3 connecting ends 23, all of which are approximately fan-shaped. The other end of the connecting end 23 is connected to the outer ring 21 of the base 2.

[0025] The outer ring 21 is coaxial with the inner ring 22. Multiple strip-shaped perforated holes 212 are evenly arranged circumferentially on the outer ring 21. These perforated holes 212 achieve weight reduction, lowering the overall weight of the support device. The outer ring 21 faces the bottom surface of the reflector 1. A cylindrical outer wall 24 is connected circumferentially around the tail end 12 of the outer ring 21. The outer wall 24 partially protrudes outward to form multiple first side blocks 24 and multiple second side blocks 25. Multiple first glue injection holes 6 are provided on the first side blocks 24, and at least one second glue injection hole 7 is provided on the second side blocks 25. The first glue injection holes 6 and the second glue injection holes 7 are used to inject glue onto the outer surface of the tail end 12. In this embodiment of the invention, there are three first side blocks 24 and three second side blocks 25. Each first side block 24 has two first glue injection holes 6, and each second side block 25 has one second glue injection hole 7. To ensure sufficient adhesive application to the outer surface of the tail end 12, in addition to the first adhesive application hole 6 and the second adhesive application hole 7, this embodiment of the invention also provides multiple third adhesive application holes. These multiple third adhesive application holes are evenly distributed on the outer wall 24, excluding the multiple first side blocks 24 and multiple second side blocks 25. This embodiment of the invention provides 24 third adhesive application holes. The adhesive application operation aims to minimize the stress caused by assembly while fixing the reflector 1. The adhesive used in this embodiment of the invention is RTV-D04, and the adhesive application technique requirements are as follows: the reflector 1 and the base 2 are glued together, with a designed adhesive layer thickness of 0.2mm, evenly distributed at 33 locations, and the adhesive area is greater than 1870mm^2. The mandrel 3 is applied to the reflector 1 (PTFE pad) and cured. The surface shape is inspected one week after curing.

[0026] The second side stop 25 is also provided with an extension end 211, and multiple extension ends 211 are evenly distributed. In this embodiment of the invention, the number of extension ends 211 is 3. Each extension end 211 is provided with a set of mounting holes 2111. The reflector support device is installed on the working surface through the mounting holes 2111, thereby fixing the reflector 1. In this embodiment of the invention, the number of mounting holes 2111 is 6, and every two mounting holes 2111 are set as a group on one extension end 211. In addition, each extension end 211 is also provided with multiple gaps 2112. The gaps 2112 are located inside the mounting holes 2111, close to the inner ring 22. The gaps 2112 are parallel to the end face of the extension end 211, and the gaps 2112 partially penetrate the extension end 211. In this embodiment of the invention, each extension end 211 is provided with two gaps 2112, and the starting positions of the two gaps 2112 are opposite to each other.

[0027] There is a gap between the mandrel 3 and the reflector 1, specifically a gap between the mandrel 3 and the inner surface of the tail end 12. This gap accommodates the polytetrafluoroethylene (PTFE) mandrel pad 4 and the injected adhesive. In this embodiment, a PTFE mandrel pad 4 is provided. The mandrel pad 4 is positioned between the flange 31 and the reflector 1, and its cross-section is "L"-shaped. One end is placed between the flange 31 and the reflector 1, and the other end is placed between the outer surface of the mandrel 3 and the reflector 1. That is, the mandrel pad 4 extends from the flange 31 and the reflector 1 to the gap between the mandrel 3 and the inner surface of the tail end 12. The gap between the mandrel 3 and the mandrel pad 4 is 0.5 mm, used for adhesive injection. A base pad 5 is provided between the base 2 and the reflector 1. Specifically, there is a gap of 0.2 mm between the connecting end 23 and the bottom surface of the reflector 1. This gap accommodates the PTFE base pad 5 and the injected adhesive. In this embodiment of the invention, a base pad 5 made of polytetrafluoroethylene (PTFE) is provided. The base pad 5 is fan-shaped and is positioned between the surface formed by the first side block 241 and the bottom surface of the reflector 1 and the base 2. The PTFE pad is not subjected to external force and is used for amplitude limiting during the load launch phase. After the reflector support device is in orbit, the PTFE pad becomes inactive.

[0028] like Figure 3 As shown, A represents the mirror mounting surface, B represents the base pad mounting surface, C represents the spindle positioning surface, D represents the spindle mounting surface, E represents the gap between the spindle and the spindle pad, and F represents the gap between the spindle and the mirror.

[0029] In an embodiment of the present invention, using Let the axial length of mandrel 3 be represented, then: , in, This indicates the distance between the positioning surface on the back of the base 2 and reflector 1 and the mounting surface of the spindle 3. This indicates the distance from the back of the mirror to the step near the mirror surface. The thickness of mandrel pad 4 and flange 31 is indicated by 0.7, which is the sum of 0.2 and 0.5. 0.2 represents the thickness of base pad 5, and 0.5 represents the gap between mandrel pad 4 and flange 31.

[0030] Although embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

[0031] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A mirror support device, characterized in that, include: A reflector, a base, and a mandrel, wherein the base includes an inner ring and an outer ring; The reflector has a through hole in its center, and the bottom surface of the reflector protrudes outward to form a tail end; The mandrel passes through the reflector and connects to the inner ring; a flange is provided on the mandrel near the mirror surface of the reflector; the flange is provided with multiple mandrel injection holes for injecting glue into the inner surface of the tail end; The outer ring is opposite to the bottom surface of the reflector. The outer ring is provided with an outer wall around the tail end in the outer circumference. The outer wall is provided with a plurality of first side blocks and second side blocks. The first side blocks are provided with a plurality of first glue injection holes, and the second side blocks are provided with at least one second glue injection hole. The first glue injection holes and the second glue injection holes are used to inject glue into the outer surface of the tail end. A mandrel pad is provided between the mandrel and the reflector; a base pad is provided between the base and the reflector.

2. The mirror support device as described in claim 1, characterized in that, Multiple connecting ends are evenly arranged between the inner ring and the outer ring for connecting the inner ring and the outer ring.

3. The mirror support device as described in claim 1, characterized in that, Multiple mandrel injection holes are evenly distributed on the flange; the number of mandrel injection holes is 8.

4. The mirror support device as described in claim 1, characterized in that, The outer wall is uniformly provided with a plurality of third glue injection holes; the number of the third glue injection holes is 24.

5. The mirror support device as described in claim 1, characterized in that, The outer wall partially protrudes outward to form multiple first side blocks and multiple second side blocks. The first side blocks are provided with multiple first glue injection holes, and the second side blocks are provided with at least one second glue injection hole.

6. The mirror support device as described in claim 1, characterized in that, The mandrel pad has an "L" shaped cross section, with one end placed between the flange and the reflector, and the other end placed between the outer surface of the mandrel and the reflector.

7. The mirror support device as described in claim 5, characterized in that, The base pad is fan-shaped and is positioned between the common surface of the first side block and the bottom surface of the reflector and the base.

8. The mirror support device as described in claim 5, characterized in that, The second side block is provided with an extension end, and each extension end is provided with a set of mounting holes, through which the reflector support device is installed on the working surface; each extension end 211 is also provided with multiple gaps, which provide flexibility.

9. The mirror support device as described in claim 1, characterized in that, There is a gap between the mandrel and the inner surface of the tail end for accommodating the mandrel pad and adhesive; there is a gap between the base and the bottom surface of the reflector for accommodating the base pad and adhesive.

10. The mirror support device as claimed in claim 1, characterized in that, The spindle pad and base pad are not subject to external forces and are used for amplitude limiting during the load launch phase; the spindle pad and base pad are inactive after the reflector support device is in orbit.

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