Rope-driven double-platform repeatable space locking and releasing mechanism

Abstract

The invention provides a rope-driven double-platform repeatable space locking and releasing mechanism, and belongs to the technical field of locking and releasing of space gravitational wave detection devices. The problems that in the prior art, after separation, gaps are not controlled, the collision risk is high, and the structure is complex are solved. The device comprises two groups of locking mechanisms, a base plate, a floating lower platform, a floating upper platform and a rope-driven U-shaped rod, the two groups of locking mechanisms are symmetrically arranged, the lower parts of the two groups of locking mechanisms are fixedly connected with the base plate, the floating upper platform is erected in a locking working space at the upper ends of the two groups of locking mechanisms, and the floating lower platform is positioned below the base plate. After separation is achieved, triggering and actuating elements such as a mooring rope and a disc spring which have completed functions are all reserved at the platform end and can be repeatedly used, waste is not generated, and follow-up work of a spacecraft is not affected. The locking and releasing process can be repeatedly operated, and after releasing is achieved, triggering and actuating elements such as the U-shaped rod and the compression spring which have completed functions are all reserved on the platform end and can be repeatedly used.

Description

Technical Field

[0001] The invention belongs to the technical field of locking and releasing of space gravitational wave detection devices, and in particular relates to a rope-driven double-platform repeatable space locking and releasing mechanism. Background Art

[0002] Gravitational wave detection is of great significance to fields such as general relativity, astrophysics, and cosmology. Due to the low frequency and small amplitude of gravitational waves, strict requirements are placed on the accuracy of the entire detection system. The required detection equipment must be released in orbit at an extremely precise position and at an extremely low speed, which requires improving the release accuracy while ensuring precise positioning. At the same time, it is necessary to be able to meet the locking state of the space motion mechanism on the ground and during the launch process, to limit the displacement and provide safety protection for the space motion mechanism, and to reliably release the space motion mechanism after it enters orbit, so that the space payload enters a normal working state. Therefore, the locking and release mechanism must not only be reliably locked and controllably unlocked, but also generate sufficient gaps between the locked structures after release to avoid friction or collision, and ensure the normal operation of the spacecraft.

[0003] Existing space locking and releasing mechanisms include Kevlar fuse release mechanism, shape memory alloy drive release mechanism, etc. These mechanisms have problems such as one-time use, complex mechanism, large size and weight, high power consumption, etc., and are not suitable for solving the on-orbit locking and releasing problems required by active vibration isolation technology in microgravity environment. It has become an urgent task to develop a locking and releasing mechanism with low impact, fast response, and repeatable ground verification. Summary of the invention

[0004] In view of this, the present invention aims to solve the problems of uncontrolled gap after separation, high collision risk, and complex structure in the prior art, and provide a locking and releasing mechanism with compact structure, reliable connection, and repeatable operation after release. The mechanism will adopt a rope drive method to achieve application in the field of gravitational wave detection in a space environment, which can reduce the impact and damage to the spacecraft structure and improve the safety and reliability of the spacecraft.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a rope-driven double-platform repeatable spatial locking and releasing mechanism, comprising two sets of locking mechanisms, a base plate, a floating lower platform, a floating upper platform and a rope-driven U-shaped rod, the two sets of locking mechanisms are symmetrically arranged, and the lower connection is fixedly connected to the base plate, the floating upper platform is mounted in the locking working space at the upper ends of the two sets of locking mechanisms, and the floating lower platform is located below the base plate.

[0006] The rope-driven U-shaped rod comprises a left cable, a U-shaped rod, two tension springs and a right cable. The left cable and the right cable are respectively installed on both sides of the U-shaped rod. Two tension springs are installed under the U-shaped rod, one end of the tension spring is connected to the U-shaped rod, and the other end is connected to the locking frame. The left cable and the right cable realize the up and down movement of the vertical axis of the locking mechanism by pulling the U-shaped rod left and right, and then the upper pressure nut and the lower pressure nut on the vertical axis respectively squeeze the second disc spring and the first disc spring of the floating upper platform and the floating lower platform, so that the two platforms are longitudinally squeezed or released, realizing the locking and releasing process.

[0007] Furthermore, the substrate is a rocket shell.

[0008] Furthermore, the locking mechanism includes a "X" piece, a compression spring, a vertical shaft, an upper pressure nut, a locking frame, an upper connecting rod, a lower connecting rod and a lower pressure nut. The upper end of the upper connecting rod is hinged to the vertical shaft, and the lower end thereof is hinged to the lower connecting rod. The lower end of the lower connecting rod is hinged to the locking frame. The position where the upper connecting rod and the lower connecting rod are hinged is also hinged to the U-shaped rod. The upper pressure nut and the lower pressure nut are respectively fixedly connected to the upper end and the lower end of the vertical shaft, and the vertical shaft is linked to the upper connecting rod and the lower connecting rod.

[0009] Furthermore, the floating lower platform includes two No. 1 disc springs, two No. 1 disc spring pads and two floating lower plates, each floating lower plate is equipped with a No. 1 disc spring and a No. 1 disc spring pad is placed between them.

[0010] Furthermore, the floating upper platform includes two No. 2 disc springs, two No. 2 disc spring pads and two floating upper plates. Each floating upper plate is installed with a No. 2 disc spring and a No. 2 disc spring pad is padded between them. The floating upper plate cooperates with the Chinese-shaped part through the compression spring of the locking mechanism.

[0011] A locking method for a rope-driven double-platform repeatable spatial locking and releasing mechanism, wherein the left cable drives the U-shaped rod to move leftward, thereby driving the upper connecting rod, the lower connecting rod and the vertical shaft to move upward, and the upper pressure nut contacts the No. 2 disc spring pad, which squeezes the No. 1 disc spring and produces an axial tension, thereby achieving locking of the floating upper plate and the "J" part, and the compression spring generates a preload force; the lower pressure nut contacts the No. 1 disc spring pad, which squeezes the No. 1 disc spring and produces an axial tension, thereby achieving locking of the floating lower plate and the base plate.

[0012] A release method for a rope-driven double-platform repeatable spatial locking and releasing mechanism, wherein the right cable drives the U-shaped rod to move to the right, thereby driving the upper connecting rod, the lower connecting rod and the vertical shaft to move downward, and the upper pressure nut is separated from the No. 2 disc spring washer to realize the release between the floating upper plate and the "J" part. At the same time, due to the pre-tightening force of the compression spring, the floating upper plate will move downward for a distance; the lower pressure nut is separated from the No. 1 disc spring washer to realize the release between the floating lower plate and the base plate.

[0013] The locking method or releasing method of the rope-driven double-platform repeatable spatial locking and releasing mechanism is repeatable in the locking and releasing process. After the release is achieved, the triggering and actuating elements such as the U-shaped rod and the compression spring that have completed their functions are retained on the platform end and can be reused.

[0014] Compared with the prior art, the rope-driven double-platform repeatable spatial locking and releasing mechanism of the present invention has the following innovative features and beneficial effects:

[0015] 1. In terms of locking method, the present invention adopts a disc spring assembly load-bearing method, and different load-bearing capacities can be obtained by changing the number of discs or the combination of discs.

[0016] 2. In terms of triggering mode, the present invention adopts rope drive, which has rapid response, high precision, low power consumption, small impact magnitude, and can realize repeated tests on the ground.

[0017] 3. In terms of the release method, the present invention uses two sets of locking mechanisms to release simultaneously. When the force is unloaded on the cable, the U-shaped rod will stop at a fixed position due to the pull limit and will not move left and right, avoiding unnecessary touch.

[0018] 4. After separation is achieved in the present invention, the cables, disc springs and other triggering and actuating elements that have completed their functions are retained on the platform end and can be reused, without generating waste and affecting the subsequent work of the spacecraft. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 It is a schematic diagram of the overall structure of a rope-driven double-platform repeatable spatial locking and releasing mechanism according to an embodiment of the present invention;

[0021] Figure 2 It is a structural schematic diagram of a locking mechanism in a rope-driven double-platform repeatable spatial locking and releasing mechanism according to an embodiment of the present invention;

[0022] Figure 3 It is a structural schematic diagram of a floating lower platform in a rope-driven double-platform repeatable spatial locking and releasing mechanism according to an embodiment of the present invention;

[0023] Figure 4 It is a schematic structural diagram of a floating upper platform in a rope-driven double-platform repeatable spatial locking and releasing mechanism according to an embodiment of the present invention;

[0024] Figure 5It is a structural schematic diagram of a rope-driven U-shaped rod in a rope-driven double-platform repeatable spatial locking and releasing mechanism according to an embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the assembly of the linkage components in a rope-driven double-platform repeatable spatial locking and releasing mechanism according to an embodiment of the present invention;.

[0026] Figure 7 It is a schematic diagram of the locking process in a rope-driven double-platform repeatable spatial locking and releasing mechanism according to an embodiment of the present invention;

[0027] Figure 8 It is a schematic diagram of the release process in a rope-driven double-platform repeatable spatial locking and releasing mechanism described in an embodiment of the present invention.

[0028] Explanation of the reference numerals: 1-locking mechanism; 101-character piece; 102-compression spring; 103-vertical shaft; 104-upper pressure nut; 105-locking frame; 106-upper connecting rod; 107-lower connecting rod; 108-lower pressure nut; 2-base plate; 3-floating lower platform; 301-disc spring No. 1; 302-disc spring pad No. 1; 303-floating lower plate; 4-floating upper platform; 401-disc spring No. 1; 402-disc spring pad No. 2; 403-floating upper plate; 5-rope-driven U-shaped rod; 501-left cable; 502-U-shaped rod; 503-tension spring; 504-right cable. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely explain the technical solutions in the embodiments of the present invention. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict, and the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0030] See also Figure 1-8 A rope-driven double-platform repeatable space locking and releasing mechanism, 1. comprising two sets of locking mechanisms 1, a base plate 2, a floating lower platform 3, a floating upper platform 4 and a rope-driven U-shaped rod 5, the two sets of locking mechanisms 1 are symmetrically arranged, and the lower part is connected to the base plate 2, the floating upper platform 4 is mounted in the locking working space at the upper end of the two sets of locking mechanisms 1, the floating lower platform 3 is located below the base plate 2,

[0031] The rope-driven U-shaped rod 5 includes a left cable 501, a U-shaped rod 502, two tension springs 503 and a right cable 504. The left cable 501 and the right cable 504 are respectively installed on both sides of the U-shaped rod 502. Two tension springs 503 are installed under the U-shaped rod 502. One end of the tension spring 503 is connected to the U-shaped rod 502, and the other end is connected to the locking frame 105; the left cable 501 and the right cable 504 realize the up and down movement of the vertical shaft 103 of the locking mechanism 1 by pulling the U-shaped rod 502 left and right, and then the upper pressure nut 104 and the lower pressure nut 108 on the vertical shaft 103 squeeze the second disc spring 401 and the first disc spring 301 of the floating upper platform 4 and the floating lower platform 3 respectively, so that the two platforms are longitudinally squeezed or released, realizing the locking and releasing process.

[0032] The substrate 2 is a rocket shell.

[0033] The locking mechanism 1 includes a Chinese-shaped piece 101, a compression spring 102, a vertical shaft 103, an upper pressure nut 104, a locking frame 105, an upper connecting rod 106, a lower connecting rod 107 and a lower pressure nut 108. The upper end of the upper connecting rod 106 is hinged to the vertical shaft 103, and the lower end thereof is hinged to the lower connecting rod 107. The lower end of the lower connecting rod 107 is hinged to the locking frame 105. The position where the upper connecting rod 106 and the lower connecting rod 107 are hinged is also hinged to the U-shaped rod 502. The upper pressure nut 104 and the lower pressure nut 107 are respectively fixedly connected to the upper end and the lower end of the vertical shaft 103, and the vertical shaft 103 is linked to the upper connecting rod 106 and the lower connecting rod 107.

[0034] The floating lower platform 3 includes two No. 1 disc springs 301, two No. 1 disc spring washers 302 and two floating lower plates 303. A No. 1 disc spring 301 is installed on each floating lower plate 303, and a No. 1 disc spring washers 302 are padded between them.

[0035] The floating upper platform 4 includes two No. 2 disc springs 401, two No. 2 disc spring pads 402 and two floating upper plates 403. A No. 2 disc spring 401 is installed on each floating upper plate 403, and a No. 2 disc spring pad 402 is padded between them. The floating upper plate 403 cooperates with the Chinese-shaped piece 101 through the compression spring 102 of the locking mechanism 1.

[0036] The present invention adopts a disc spring assembly load-bearing method, and different load-bearing capacities can be obtained by changing the number of discs or the combination of discs.

[0037] A locking method for a rope-driven double-platform repeatable spatial locking and releasing mechanism, wherein the left cable 501 drives the U-shaped rod 502 to move leftward, thereby driving the upper connecting rod 107, the lower connecting rod 108 and the vertical shaft 103 to move upward, and the upper pressure nut 104 contacts the No. 2 disc spring washer 402, which produces an axial tension on the No. 2 disc spring 401, thereby achieving the locking of the floating upper plate 403 and the Chinese-character part 101, and the compression spring 102 generates a preload; the lower pressure nut 108 contacts the No. 1 disc spring washer 302, which produces an axial tension on the No. 1 disc spring 301, thereby achieving the locking of the floating lower plate 303 and the base 2.

[0038] A release method for a rope-driven double-platform repeatable spatial locking and releasing mechanism, wherein the right cable 504 drives the U-shaped rod 502 to move rightward, thereby driving the upper connecting rod 107, the lower connecting rod 108 and the vertical shaft 103 to move downward, and the upper pressure nut 104 is separated from the second disc spring washer 402 to achieve the release between the floating upper plate 403 and the Chinese character 101. At the same time, due to the pre-tightening force of the compression spring 102, the floating upper plate 403 will move downward for a distance; the lower pressure nut 108 is separated from the first disc spring washer 302 to achieve the release between the floating lower plate and the base plate 2.

[0039] The locking method or releasing method of the rope-driven double-platform repeatable spatial locking and releasing mechanism is a locking and releasing process that can be repeated. After the release is completed, the triggering and actuating elements such as the U-shaped rod 502 and the compression spring 102 that have completed their functions are retained on the platform end and can be reused.

[0040] The embodiments of the present invention disclosed above are only used to help illustrate the present invention. The embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. According to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well.

Claims

1. A rope-driven double-platform repeatable spatial locking and releasing mechanism, characterized in that: The invention comprises two sets of locking mechanisms (1), a base plate (2), a floating lower platform (3), a floating upper platform (4) and a rope-driven U-shaped rod (5). The two sets of locking mechanisms (1) are symmetrically arranged and are connected and fixedly connected to the base plate (2) at the bottom. The floating upper platform (4) is mounted in the locking working space at the upper ends of the two sets of locking mechanisms (1). The floating lower platform (3) is located below the base plate (2). The rope-driven U-shaped rod (5) comprises a left cable (501), a U-shaped rod (502), two tension springs (503) and a right cable (504). The left cable (501) and the right cable (504) are respectively installed on both sides of the U-shaped rod (502). Two tension springs (503) are installed below the U-shaped rod (502). One end of the tension spring (503) is connected to the U-shaped rod (502), and the other end is connected to the locking frame (105). (501) and the right cable (504) realize the up and down movement of the vertical shaft (103) of the locking mechanism (1) by pulling the U-shaped rod (502) left and right, and then the upper pressure nut (104) and the lower pressure nut (108) on the vertical shaft (103) respectively squeeze the second disc spring (401) and the first disc spring (301) of the floating upper platform (4) and the floating lower platform (3), so that the two platforms are longitudinally squeezed or released, realizing the locking and releasing process.

2. The rope-driven double-platform repeatable spatial locking and releasing mechanism according to claim 1, characterized in that: The base plate (2) is a rocket shell.

3. The rope-driven double-platform repeatable spatial locking and releasing mechanism according to claim 1, characterized in that: The locking mechanism (1) comprises a Chinese-shaped part (101), a compression spring (102), a vertical shaft (103), an upper pressure nut (104), a locking frame (105), an upper connecting rod (106), a lower connecting rod (107) and a lower pressure nut (108); the upper end of the upper connecting rod (106) is hinged to the vertical shaft (103), and the lower end of the upper connecting rod (106) is hinged to the lower connecting rod (107); the lower end of the lower connecting rod (107) is hinged to the locking frame (105); the position where the upper connecting rod (106) and the lower connecting rod (107) are hinged is also hinged to the U-shaped rod (502); the upper pressure nut (104) and the lower pressure nut 107 are respectively fixed to the upper end and the lower end of the vertical shaft (103); the vertical shaft (103) is linked to the upper connecting rod (106) and the lower connecting rod (107).

4. The rope-driven double-platform repeatable spatial locking and releasing mechanism according to claim 1, characterized in that: The floating lower platform (3) comprises two No. 1 disc springs (301), two No. 1 disc spring washers (302) and two floating lower plates (303), each floating lower plate (303) being provided with a No. 1 disc spring (301) and a No. 1 disc spring washers (302) being provided between them.

5. The rope-driven double-platform repeatable spatial locking and releasing mechanism according to claim 1, characterized in that: The floating upper platform (4) comprises two No. 2 disc springs (401), two No. 2 disc spring washers (402) and two floating upper plates (403). A No. 2 disc spring (401) is installed on each floating upper plate (403), and a No. 2 disc spring washers (402) are padded between the two. The floating upper plate (403) cooperates with the Chinese character piece (101) through the compression spring (102) of the locking mechanism (1).

6. A locking method for a rope-driven double-platform repeatable spatial locking and releasing mechanism according to any one of claims 1 to 5, characterized in that: The left cable (501) drives the U-shaped rod (502) to move leftward, thereby driving the upper connecting rod (107), the lower connecting rod (108) and the vertical shaft (103) to move upward, and the upper pressure nut (104) contacts the No. 2 disc spring washer (402), which produces an axial tension on the No. 2 disc spring (401), thereby locking the floating upper plate (403) and the Chinese-character part (101), and at the same time, the compression spring (102) produces a pre-tightening force; the lower pressure nut (108) contacts the No. 1 disc spring washer (302), which produces an axial tension on the No. 1 disc spring (301), thereby locking the floating lower plate (303) and the base plate (2).

7. A method for releasing a rope-driven double-platform repeatable spatial locking and releasing mechanism according to any one of claims 1 to 5, characterized in that: The right cable (504) drives the U-shaped rod (502) to move to the right, thereby driving the upper connecting rod (107), the lower connecting rod (108) and the vertical shaft (103) to move downward, and the upper pressure nut (104) is separated from the second disc spring washer (402), thereby realizing the release between the floating upper plate (403) and the Chinese-character part (101). At the same time, due to the pre-tightening force of the compression spring (102), the floating upper plate (403) will move downward for a distance; the lower pressure nut (108) is separated from the first disc spring washer (302), thereby realizing the release between the floating lower plate and the base plate (2).

8. The locking method or releasing method of the rope-driven double-platform repeatable spatial locking and releasing mechanism according to any one of claims 6 or 7, characterized in that: The locking and releasing process can be repeated. After the release is completed, the triggering and actuating elements such as the U-shaped rod (502) and the compression spring (102) that have completed their functions are retained on the platform end and can be reused.

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