An expanded locking type large aperture mirror flexible support structure

Abstract

The application discloses a flexible support structure of an expansion locking type large-aperture reflector, which is characterized by the following steps: a plurality of sink hole structures are designed at the back of the reflector; a locking bush with a toothed groove is bonded into the sink hole of the reflector; expansion locking rods and expansion thrust rods are installed on the reflector support plate and correspond to the positions of the sink holes of the reflector; the support rigidity of the expansion locking rods to the locking bush can be controlled by adjusting the expansion thrust rods, so that the flexibility of the support structure is adjusted; and if the expansion thrust rods are adjusted so that the expansion locking rods are not in contact with the locking bush, the support rigidity is zero, and the point does not play a supporting role. The application can quickly adjust the supporting points of the reflector and adjust the flexibility of the support structure.

Description

Technical Field

[0001] This invention belongs to the field of optomechanical structure of space optical remote sensors, specifically relating to an expansion-locking type flexible support structure for large-aperture reflectors. Background Technology

[0002] Large-aperture remote sensing cameras are a research hotspot in the field of remote sensing both domestically and internationally. The support scheme for large-aperture mirrors is a core challenge in the development of large-aperture remote sensing cameras. The support structure for large-aperture mirrors needs to ensure both the rigidity of the mirror support and, after the mirror is subjected to environmental influences such as assembly, temperature fluctuations, and vibrations, the internal stress generated by the support structure is sufficiently small to ensure that the surface shape changes of the mirror are within the required range.

[0003] Conventional mirror support solutions utilize silicone rubber to bond the mirror and structural components together, or involve designing a flexible support structure. During the testing of large-aperture mirrors, the placement of support points and the flexibility of the structure require repeated adjustments. Using conventional support methods would necessitate multiple disassemblies and reassemblies of the structural components, and even repeated fabrication of flexible structures with different design dimensions. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an expansion-locking type flexible support structure for large-diameter reflectors, which can quickly adjust the support points of the reflectors and adjust the flexibility of the support structure components.

[0005] To achieve the above objectives, the present invention provides an expansion-locking type flexible support structure for a large-diameter reflector, comprising a reflector, a support plate, and several sets of expansion-locking support units.

[0006] The support plate and the reflector are connected by several sets of expansion locking support units. By adjusting the expansion locking support units, flexible support for the reflector can be achieved.

[0007] Preferably, the expansion locking support unit includes a locking bushing, an expansion adjustment unit, and a main body connecting seat; the back of the reflector is designed with multiple countersunk holes, and the locking bushing is bonded to the countersunk holes of the reflector; the expansion adjustment unit is fixed on the main body connecting seat, and the main body connecting seat is fixedly connected to the support plate.

[0008] Preferably, the expansion adjustment unit includes a thrust rod collar, an expansion thrust rod, an expansion locking rod, and an adjusting nut;

[0009] The thrust rod collar is fitted onto the upper end of the expansion thrust rod and screwed to it. The lower part of the expansion thrust rod is machined with external threads, which match the internal threads of the adjusting nut, thus realizing the threaded connection between the expansion thrust rod and the adjusting nut. The bottom of the adjusting nut is connected to the main body connecting seat by screws. The expansion locking rod is fitted onto the outside of the adjusting nut, and the adjusting nut and the expansion locking rod are connected by adhesive bonding.

[0010] Preferably, the upper part of the outer wall of the expansion thrust rod is machined with two conical structures, and the inner ring of the expansion locking rod is machined with a conical groove that matches the conical structure.

[0011] Preferably, the inner walls of the locking bushing and the main body connecting seat are provided with multiple rings of trapezoidal toothed grooves, and the outer circle of the expansion locking rod is provided with multiple rings of trapezoidal teeth.

[0012] Preferably, the expansion locking rod has multiple evenly distributed wire-cut grooves machined along its circumference.

[0013] Preferably, by rotating the expansion thrust rod, the expansion thrust rod moves up and down in the adjusting nut, so that the trapezoidal teeth of the expansion locking rod are embedded into the trapezoidal tooth grooves on the inner wall of the locking bushing and the main body connecting seat, and the degree of embedding is controlled, thereby adjusting the connection stiffness between the expansion locking support unit and the reflector, and achieving the purpose of controlling the flexibility of the local support connection.

[0014] Preferably, the upper part of the expansion locking rod has a frustum-shaped structure.

[0015] Preferably, the end of the expansion thrust rod is connected to a drive mechanism, which is an electric drive mechanism, a pneumatic drive mechanism, a hydraulic drive mechanism, or a manual drive mechanism.

[0016] Preferably, the diameter of the reflector is ≥ φ1000mm.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] (1) The expansion locking type flexible support structure for large-diameter reflectors adopted in this invention has the characteristics of convenient disassembly and assembly, and quick and simple debugging. During the debugging stage of the reflector, the debugging process can be accelerated and an effective support scheme can be established quickly. In particular, the larger the diameter of the reflector, the more obvious the improvement in debugging efficiency.

[0019] (2) The expansion-locking type large-diameter reflector flexible support structure adopted in this invention has the characteristics of small size and simple structure, which can effectively reduce the weight of the structural support and improve the overall space utilization.

[0020] (3) The expansion-locking flexible support structure for large-aperture reflectors adopted in this invention has the characteristics of high stiffness, high damping, and flexibility, which can fully meet the support requirements of large-aperture reflectors. Attached Figure Description

[0021] Figure 1 This is an assembly diagram of the large-diameter reflector expansion locking device of the present invention;

[0022] Figure 2 This is a schematic diagram of the internal structure of the expansion locking support unit of the present invention;

[0023] Figure 3 This is a schematic diagram of the expansion adjustment unit structure of the present invention;

[0024] Figure 4 This is a schematic diagram of the locking bushing of the present invention;

[0025] Figure 5 This is a schematic diagram of the main body connector of the present invention;

[0026] Figure 6 This is a schematic diagram of the expansion locking rod of the present invention;

[0027] In the diagram: 1-Reflector, 2-Support plate, 3-Expansion locking support unit, 4-Locking bushing, 5-Expansion adjustment unit, 6-Main body connecting seat, 7-Thrust rod collar, 8-Expansion thrust rod, 9-Expansion locking rod, 10-Adjusting nut. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings.

[0029] The principle of this invention is as follows: Multiple countersunk holes are designed on the back of the reflector, and a locking bushing with toothed grooves is bonded to the countersunk holes of the reflector. On the reflector support plate, expansion locking rods and expansion thrust rods are installed corresponding to the countersunk holes of the reflector. By adjusting the expansion thrust rod, the support stiffness of the expansion locking rod on the locking bushing can be controlled, thereby adjusting the flexibility of the support structure. If the expansion thrust rod is adjusted so that the expansion locking rod does not contact the locking bushing, there is no support stiffness, and that point does not provide support.

[0030] like Figure 1-6 As shown, the flexible support structure for a large-diameter reflector with expansion locking according to the present invention includes a reflector 1, a support plate 2, and several sets of expansion locking support units 3. The support plate 2 is connected to the reflector 1 through several sets of expansion locking support units 3, and the flexible support for the reflector is achieved by adjusting the expansion locking support units 3.

[0031] The expansion locking support unit 3 consists of a locking bushing 4, an expansion adjustment unit 5, and a main body connecting seat 6. The back of the reflector is designed with multiple countersunk holes, and the locking bushing 4 is bonded to the countersunk holes of the reflector; the expansion adjustment unit 5 is fixed on the main body connecting seat 6, and the main body connecting seat 6 is connected to the support plate 2.

[0032] The expansion adjustment unit 5 consists of a thrust rod collar 7, an expansion thrust rod 8, an expansion locking rod 9, and an adjusting nut 10. The thrust rod collar 7 is fitted onto the upper end of the expansion thrust rod 8 and screwed to it. The lower part of the expansion thrust rod 8 has external threads that match the internal threads of the adjusting nut 10, achieving a threaded connection between the expansion thrust rod 8 and the adjusting nut 10. The bottom of the adjusting nut 10 is screwed to the main body connecting seat 6. The expansion locking rod 9 is fitted onto the outside of the adjusting nut 10, and the adjusting nut 10 and the expansion locking rod 9 are connected by adhesive bonding.

[0033] The inner cavity of the locking bushing 4 and the main body connecting seat 6 is provided with multiple rings of trapezoidal toothed grooves, and the outer circle of the expansion locking rod 9 is provided with multiple rings of trapezoidal teeth.

[0034] The expansion locking rod 9 has multiple evenly distributed wire-cut grooves machined along its circumference, giving the structure a certain degree of flexibility. By rotating the expansion thrust rod 8, the rotating expansion thrust rod 8 moves up and down in the adjusting nut 10, thereby controlling the opening and closing degree of the flexible structure at the end of the expansion locking rod 9, thus adjusting the connection stiffness between the expansion locking support unit 3 and the reflector 1, and achieving the purpose of controlling the flexibility of the local support connection.

[0035] The diameter of the supported optical mirror is ≥ φ1000mm.

[0036] This invention includes a reflector 1, a support plate 2, and several sets of expansion locking support units 3. It should be noted that the described connection generally refers to fixing the components together using methods such as adhesive bonding, screwing, or welding.

[0037] After connecting several sets of expansion adjustment units 5 to the main body connecting seat 6, they are connected to the support plate 2, preferably by screw connection. Several locking bushings 4 are connected to the reflector 1, preferably by adhesive connection. Figure 1 In the example, the reflector has a diameter of 1500mm and a total of 18 sets of expansion-locking flexible support units are used. It should be noted that the number of expansion-locking flexible support units can be adjusted according to the design of the reflector and support plate.

[0038] Furthermore, the reflector 1 and support plate 2 are supported in the correct position using auxiliary tooling such as pads, and then the position of the expansion thrust rod 8 is adjusted to achieve support of the reflector 1 by the support plate 2. The adjustment method of the expansion thrust rod 8 is not limited to manual, electric, pneumatic, or hydraulic drive; a suitable interface needs to be provided at the end of the expansion thrust rod 8. The preferred implementation is manual drive.

[0039] The present invention has been disclosed above in the form of a technical solution. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A flexible support structure for a large-aperture reflector with an expansion-locking mechanism, characterized in that, It includes a reflector (1), a support plate (2) and several sets of expansion locking support units (3); The support plate (2) and the reflector (1) are connected by several sets of expansion locking support units (3). By adjusting the expansion locking support units (3), flexible support for the reflector can be achieved. The expansion locking support unit (3) includes a locking bushing (4), an expansion adjustment unit (5), and a main body connecting seat (6); the back of the reflector is designed with multiple countersunk holes, and the locking bushing (4) is bonded to the countersunk holes of the reflector; the expansion adjustment unit (5) is fixed on the main body connecting seat (6), and the main body connecting seat (6) is fixedly connected to the support plate (2); The expansion adjustment unit (5) includes a thrust rod collar (7), an expansion thrust rod (8), an expansion locking rod (9), and an adjusting nut (10). Among them, the thrust rod collar (7) is fitted on the upper end of the expansion thrust rod (8) and screwed to the expansion thrust rod (8); the lower part of the expansion thrust rod (8) is machined with external threads, which match the internal threads of the adjusting nut (10) to realize the threaded connection between the expansion thrust rod (8) and the adjusting nut (10). The bottom of the adjusting nut (10) is connected to the main body connecting seat (6) by screws; the expansion locking rod (9) is fitted on the outside of the adjusting nut (10), and the adjusting nut (10) and the expansion locking rod (9) are connected by adhesive bonding.

2. The expansion-locking type flexible support structure for a large-aperture reflector according to claim 1, characterized in that, The upper part of the outer wall of the expansion thrust rod (8) is machined with two protruding conical structures, and the inner ring of the expansion locking rod (9) is machined with a conical groove that matches the conical structure.

3. The expansion-locking type flexible support structure for a large-aperture reflector according to claim 2, characterized in that, The inner walls of the locking bushing (4) and the main body connecting seat (6) are provided with multiple ring-shaped trapezoidal teeth, and the outer circle of the expansion locking rod (9) is provided with multiple ring-shaped trapezoidal teeth.

4. The expansion-locking type flexible support structure for a large-aperture reflector according to claim 3, characterized in that, The expansion locking rod (9) has multiple evenly distributed wire cutting grooves machined along its circumference.

5. The expansion-locking type flexible support structure for a large-aperture reflector according to claim 4, characterized in that, By rotating the expansion thrust rod (8), the expansion thrust rod (8) moves up and down in the adjusting nut (10), so that the trapezoidal teeth of the expansion locking rod (9) are embedded into the trapezoidal tooth grooves on the inner wall of the locking bushing (4) and the main body connecting seat (6), and the degree of embedding is controlled, thereby adjusting the connection stiffness between the expansion locking support unit (3) and the reflector (1) to achieve the purpose of controlling the flexibility of the local support connection.

6. The expansion-locking type flexible support structure for a large-aperture reflector according to claim 1, characterized in that, The upper part of the expansion locking rod (9) is a frustum-shaped structure.

7. The expansion-locking type flexible support structure for a large-aperture reflector according to claim 1, characterized in that, The end of the expansion thrust rod (8) is connected to the drive mechanism, which is an electric drive mechanism, a pneumatic drive mechanism, a hydraulic drive mechanism, or a manual drive mechanism.

8. The expansion-locking type flexible support structure for a large-aperture reflector according to claim 1, characterized in that, The diameter of the reflector is φ≥1000mm.

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