A multi-stage micro-resistance unloading structure

Abstract

The multi-stage micro-resistance unloading structure is applied to a ring-shaped or umbrella-shaped deployable antenna, and the ring-shaped or umbrella-shaped antenna is unfolded to a specified angle through operation of experimenters during performance test in the unfolded and folded states, the function of the difference between theory and actual profile of the simulation antenna in orbit is realized, and then the antenna electrical performance parameters are confirmed and optimized, the operation is flexible, the flexibility and operation stability of the ring-shaped or umbrella-shaped deployable antenna during electrical unfolding / folding test are improved, the time of the electrical test of the ring-shaped or umbrella-shaped deployable antenna is shortened, and the work efficiency of the test is improved.

Description

Technical Field

[0001] This utility model belongs to the field of performance testing of the retracted and deployed states of ring or umbrella-shaped deployable antennas. Specifically, this utility model relates to a multi-stage low-resistance unloading structure. Background Technology

[0002] Aerospace is one of the most active and influential scientific and technological fields in the world. Its products have extremely high added value, driving the development of other high-tech fields and having a huge and profound impact on the national economy and social life. With the development of my country's aerospace technology, aerospace satellites are increasingly showing a trend of continuously increasing orbital altitude and antenna size. The original solid-surface antennas have been increasingly exposed as having shortcomings such as large weight and difficulty in increasing size. Therefore, ring and umbrella-shaped deployable antennas have emerged. For example, the "Queqiao" satellite, which played a role in the Yutu-2 lunar landing, adopted an umbrella-shaped deployable structure design. The development prospects of such deployable antennas are broad. The main electrical performance parameters of satellite antennas include radiation pattern, input impedance, gain, polarization, and VSWR. Whether a loop or umbrella-shaped antenna can be deployed or deployed to the correct position, and whether its surface accuracy meets the requirements, are the physical carriers upon which these electrical performance parameters are based. Therefore, before a loop or umbrella-shaped deployable antenna can be successfully delivered to a customer, it must undergo deployment / retraction performance testing of the antenna's mechanical parts to simulate the zero-gravity conditions during antenna deployment in space. Generally, mechanical deployment / retraction testing is conducted before the antenna's electrical performance testing. During this process, an unloading mechanism is usually set up. Traditional unloading mechanisms are linear bearing structures, which have long ball bearing rotation cycles, high resistance, and short strokes. When deploying in multiple stages, the space between stages is small, which cannot meet the requirements for low resistance in antenna testing and is not conducive to the short cycle requirements and cost control requirements of antenna testing.

[0003] To address the aforementioned issues, patent application number 202211349848.6 discloses a magnetic-pneumatic hybrid suspension gravity unloading device and system. The gravity unloading device includes a support assembly, a magnetic-pneumatic hybrid motion mechanism, a lifting mechanism, and a control unit. The magnetic-pneumatic hybrid motion mechanism includes a magnetic component, which comprises an air buoyancy component, a magnetic ring, and a first end face. When the magnetic component is energized and ventilated, the interaction of electromagnetic attraction and gas repulsion creates a first gap between the first end face and a reference surface, and maintains the distance of the first gap unchanged. The lifting mechanism includes a traction line and a holding member, which is located at the downward extension end of the traction line and is used to suspend the experimental target. However, this method fails to solve the aforementioned problems.

[0004] Therefore, in order to improve or solve at least one of the above problems, a multi-stage low-resistance unloading structure is provided, which is suitable for performance testing of loop or umbrella-shaped deployable antennas in both deployment and retraction states, has low operating resistance, is flexible in operation, improves the flexibility and operational stability of loop or umbrella-shaped deployable antennas during electrical deployment / retraction testing, shortens the electrical testing time of loop or umbrella-shaped deployable antennas, and improves the efficiency of test work. Summary of the Invention

[0005] This utility model is designed to solve the aforementioned problems. Its purpose is to provide a multi-stage low-resistance unloading structure suitable for performance testing of loop or umbrella-shaped deployable antennas in their deployed and retracted states. This structure features low operating resistance, flexible operation, improved flexibility and operational stability during electrical deployment / retraction testing of loop or umbrella-shaped deployable antennas, reduced electrical testing time, and increased testing efficiency. To achieve the above objectives, the technical solution adopted by this utility model is as follows: This utility model provides a multi-stage low-resistance unloading structure, which includes a guide rail unit and a linear adjustment component disposed on the guide rail unit, the linear adjustment component being movably disposed on the guide rail unit.

[0006] The multi-stage low-resistance unloading structure provided by this utility model may also have the following features: the guide rail unit includes a first-stage guide rail assembly, a second-stage guide rail assembly, and a third-stage guide rail assembly, wherein the second-stage guide rail assembly is movably connected to the first-stage guide rail assembly, and the third-stage guide rail assembly is movably connected to the second-stage guide rail assembly.

[0007] The multi-stage low-resistance unloading structure provided by this utility model may also have the following features: the first-stage guide rail assembly includes a first guide rail rod and a first limiting block disposed at the end of the first guide rail rod; the second-stage guide rail assembly includes a second guide rail rod and a second limiting block disposed at the end of the second guide rail rod; and the third-stage guide rail assembly includes a third guide rail rod and a third limiting block disposed at the end of the third guide rail rod.

[0008] The multi-stage low-resistance unloading structure provided by this utility model may also have the following features: the guide rail unit further includes an inter-stage sliding assembly, which includes a support base and a movable base connected to the support base. The support base is provided with a through hole, and the movable base is provided with a sliding groove. The sliding groove is provided with an opening, and sliding bearings are provided on both sides of the opening.

[0009] The multi-stage low-resistance unloading structure provided by this utility model may also have the following features: a first connecting protrusion is provided on the support base, a second connecting protrusion is provided on the movable base, a connecting bolt is provided between the first connecting protrusion and the second connecting protrusion, a threaded hole adapted to the connecting bolt is provided on the second connecting protrusion, and a connecting nut is screwed on the connecting bolt.

[0010] The multi-stage low-resistance unloading structure provided by this utility model may also have the following features: the linear adjustment component includes an adjustment adaptor, a left-hand screw, a left-hand and right-hand threaded sleeve, and a right-hand screw. The adjustment adaptor is connected to one end of the left-hand screw, the end of the left-hand screw away from the adjustment adaptor is movably connected to the left-hand and right-hand threaded sleeve, one end of the right-hand screw is movably connected to the left-hand and right-hand threaded sleeve, and the other end of the right-hand screw is connected to the first guide rail rod. The adjustment adaptor is provided with a waist-shaped hole.

[0011] The multi-stage low-resistance unloading structure provided by this utility model may also have the following features: the first guide rod is provided with a mounting hole, the right-hand screw passes through the mounting hole, the right-hand screw is provided with a special-shaped washer, the special-shaped washer is located on both sides of the first guide rod, the side of the special-shaped washer near the first guide rod is arc-shaped, the two ends of the left-hand and right-hand threaded sleeve are provided with locking nuts, and the right-hand screw is provided with a fastening nut.

[0012] The multi-stage low-resistance unloading structure provided by this utility model may also have the following feature: it further includes a stroke limiting component, which includes a first arc-shaped limiting plate and a second arc-shaped limiting plate. The first arc-shaped limiting plate has a first connecting plate on both sides, and the second arc-shaped limiting plate has a second connecting plate on both sides.

[0013] The multi-stage low-resistance unloading structure provided by this utility model may also have the following features: a first limiting flange is provided on the first arc-shaped limiting plate, and a second limiting flange is provided on the second arc-shaped limiting plate. The technical advantages of this invention are as follows: The multi-stage low-resistance unloading structure provided by this invention includes a guide rail unit and a linear adjustment component mounted on the guide rail unit. The linear adjustment component is movably mounted on the guide rail unit. When applied to a loop or umbrella-shaped deployable antenna, the loop or umbrella antenna can be deployed to a specified angle by the operator during performance testing in both deployed and retracted states. This simulates the difference between the theoretical and actual antenna profiles when the antenna is in orbit, thereby confirming and optimizing the antenna's electrical performance parameters. The flexible operation improves the flexibility and operational stability of the loop or umbrella-shaped deployable antenna during electrical deployment / retraction testing, shortens the electrical testing time, and increases the efficiency of the experiment. Attached Figure Description

[0014] This manual includes the following figures, which illustrate the following: Figure 1 This is a schematic diagram of the multi-stage micro-resistance unloading structure in an embodiment of this utility model; Figure 2 This is an exploded view of the multi-stage micro-resistance unloading structure in an embodiment of this utility model; Figure 3This is a schematic diagram of the structure of the primary guide rail assembly in an embodiment of this utility model; Figure 4 This is a schematic diagram of the structure of the secondary guide rail assembly in an embodiment of this utility model; Figure 5 This is a schematic diagram of the structure of the three-stage guide rail assembly in an embodiment of this utility model; Figure 6 This is a schematic diagram of the structure of the inter-stage sliding component in an embodiment of this utility model; Figure 7 This is a schematic diagram of the linear adjustment component in an embodiment of this utility model; Figure 8 This is a schematic diagram of the travel limit component in an embodiment of this utility model.

[0015] The components in the diagram are labeled as follows: Guide rail unit-10, primary guide rail assembly-11, first guide rail rod-111, first limiting block-112, mounting hole-113, secondary guide rail assembly-12, second guide rail rod-121, second limiting block-122, tertiary guide rail assembly-13, third guide rail rod-131, third limiting block-132, interstage sliding assembly-14, support base-141, movable base-142, through hole-143, slide groove-144, opening-145, sliding bearing-146, first connecting protrusion-147, second connecting... 148. Protrusion - 149. Threaded hole - 15. Connecting bolt - 16. Connecting nut - 16. Linear adjustment assembly - 20. Adjustment adapter - 21. Waist-shaped hole - 211. Left-hand screw - 22. Left-hand and right-hand threaded sleeve - 23. Right-hand screw - 24. Irregularly shaped washer - 25. Locking nut - 26. Fastening nut - 27. Stroke limit assembly - 30. First arc-shaped limit plate - 31. First connecting plate - 311. First limit flange - 312. Second arc-shaped limit plate - 32. Second connecting plate - 321. Second limit flange - 322. Detailed Implementation

[0016] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention, and to facilitate its implementation.

[0017] Figure 1 This is a schematic diagram of the multi-stage micro-resistance unloading structure in an embodiment of this utility model; Figure 2 This is an exploded view of the multi-stage micro-resistance unloading structure in an embodiment of this utility model.

[0018] like Figure 1 and Figure 2As shown, the multi-stage low-resistance unloading structure provided by this utility model includes a guide rail unit 10 and a linear adjustment component 20 disposed on the guide rail unit 10. The linear adjustment component 20 is movably disposed on the guide rail unit 10. When applied to a loop or umbrella-shaped deployable antenna, the loop or umbrella-shaped antenna can be deployed to a specified angle by the experimenter during performance testing in the deployment and retraction states. This realizes the function of simulating the difference between the theoretical and actual shape of the antenna when it is on track, thereby confirming and optimizing the antenna's electrical performance parameters. The operation is flexible, which helps to improve the flexibility and operational stability of the loop or umbrella-shaped deployable antenna during electrical deployment / retraction testing, shortens the electrical testing time of the loop or umbrella-shaped deployable antenna, and improves the work efficiency of the test.

[0019] Figure 3 This is a schematic diagram of the structure of the primary guide rail assembly in an embodiment of this utility model; Figure 4 This is a schematic diagram of the structure of the secondary guide rail assembly in an embodiment of this utility model; Figure 5 This is a schematic diagram of the structure of the three-stage guide rail assembly in an embodiment of this utility model.

[0020] like Figure 3 , Figure 4 as well as Figure 5 As shown, the guide rail unit 10 includes a primary guide rail assembly 11, a secondary guide rail assembly 12, and a tertiary guide rail assembly 13. The secondary guide rail assembly 12 is movably connected to the primary guide rail assembly 11, and the tertiary guide rail assembly 13 is movably connected to the secondary guide rail assembly 12. The primary guide rail assembly 11 includes a first guide rail rod 111 and a first limiting block 112 disposed at the end of the first guide rail rod 111. The first limiting block 112 is disposed at both ends of the first guide rail rod 111. The secondary guide rail assembly 12 includes a second guide rail rod 121 and a second limiting block 122 disposed at both ends of the second guide rail rod 121. The second limiting block 122 at the end of the second guide rail rod 121 is disposed at both ends of the second guide rail rod 121; the three-stage guide rail assembly 13 includes a third guide rail rod 131 and a third limiting block 132 disposed at the end of the third guide rail rod 131. The third limiting block 132 is disposed at both ends of the third guide rail rod 131. The first limiting block 112, the second limiting block 122 and the third limiting block 132 help prevent the guide rail movement from exceeding the predetermined stroke due to inertia during the unloading process, which is conducive to the stable conduct of subsequent testing processes.

[0021] Figure 6 This is a schematic diagram of the structure of the inter-level sliding component in an embodiment of this utility model.

[0022] like Figure 6As shown, the guide rail unit 10 also includes an inter-stage sliding assembly 14, which is used to movably connect the first-stage guide rail assembly 11, the second-stage guide rail assembly 12, and the third-stage guide rail assembly 13. The inter-stage sliding assembly 14 includes a support base 141 and a movable seat 142 connected to the support base 141. The support base 141 has a through hole 143, which is adapted to the second guide rail rod 121 and the third guide rail rod 131. The movable seat 142 has a sliding groove 144, which is adapted to the first guide rail rod 111 and the second guide rail rod 121. The inter-stage sliding assembly 14 is sleeved on the second guide rail rod 121 or the third guide rail rod 131 through the through hole 143, and on the first guide rail rod 131 through the sliding groove 144. On the first guide rail 111 or the second guide rail 121, the slide groove 144 is provided with an opening 145, and sliding bearings 146 are provided on both sides of the opening 145. The sliding bearings 146 abut against the first guide rail 111 or the second guide rail 121, thereby reducing friction. The first guide rail 111 and the second guide rail 121 are movably connected by two sets of inter-stage sliding components 14. The second guide rail 121 and the third guide rail 131 are movably connected by two sets of inter-stage sliding components 14. Paired circular arrays and rectangular arrays can be realized. It is not only applicable to the deployment / retraction test of ring deployable antennas, but also to the deployment / retraction test of umbrella-shaped deployable antennas and the deployment / retraction test of a single antenna rib. It can perform all similar antenna deployment / retraction test work.

[0023] like Figure 6 As shown, the support base 141 is provided with a first connecting protrusion 147, and the movable base 142 is provided with a second connecting protrusion 148. A connecting bolt 15 is provided between the first connecting protrusion and the second connecting protrusion. The second connecting protrusion 148 is provided with a threaded hole 149 adapted to the connecting bolt. The first connecting protrusion 147 is provided with a round hole. The connecting bolt 15 rotatably passes through the round hole on the first connecting protrusion 147 and is screwed into the threaded hole 149 on the second connecting protrusion 148 through threaded engagement, thereby connecting the support base 141 and the movable base 142. A connecting nut 16 is screwed on the connecting bolt 15. The two connecting nuts 16 abut against the first connecting protrusion 147 and the second connecting protrusion 148 respectively, thereby locking the support base 141 and the movable base 142.

[0024] Figure 7 This is a schematic diagram of the linear adjustment component in an embodiment of this utility model.

[0025] like Figure 7As shown, the linear adjustment assembly 20 includes an adjustment adapter 21, a left-hand screw 22, left-hand and right-hand threaded sleeves 23, and a right-hand screw 24. The adjustment adapter 21 is connected to one end of the left-hand screw 22. The end of the left-hand screw 22 away from the adjustment adapter 21 is movably connected to the left-hand and right-hand threaded sleeves 23 through a threaded engagement. One end of the right-hand screw 24 is movably connected to the left-hand and right-hand threaded sleeves 23 through a threaded engagement. The other end of the right-hand screw 24 is connected to the first guide rail rod 111. The adjustment adapter 21 is provided with a waist-shaped hole 211. The adjustment direction of the adjustment adapter 21 and the waist-shaped hole 211 can rotate around the axis of the left-hand screw 22, with a large adjustment range and good adaptability to the guide rail fixing frame.

[0026] The first guide rail rod 111 has mounting holes 113 evenly distributed on it. A right-hand screw 24 passes through one of these holes. A shaped washer 25 is provided on the right-hand screw 24, located on both the upper and lower sides of the first guide rail rod 111. The side of the shaped washer 25 closest to the first guide rail rod 111 has an arc surface, facilitating effective contact between the washer 25 and the first guide rail rod 111 and improving the effective transmission of force when the linear adjustment assembly 20 is connected to the first guide rail rod 111. Locking nuts 26 are provided at both ends of the left-hand and right-hand threaded sleeves 23. These locking nuts 26 lock the left-hand screw 22, the left-hand and right-hand threaded sleeves 23, and the right-hand screw 24, preventing adverse effects of antenna vibration on the guide rail unit 10. A fastening nut 27 is provided on the right-hand screw 24. The fastening nut 27 abuts against the irregular washer 25, thereby achieving a stable connection between the linear adjustment assembly 20 and the first guide rail rod 111.

[0027] Figure 8 This is a schematic diagram of the travel limit component in an embodiment of this utility model.

[0028] like Figure 8 As shown, the multi-stage low-resistance unloading structure provided by this utility model also includes a stroke limiting component 30. The stroke limiting component 30 includes a first arc-shaped limiting plate 31 and a second arc-shaped limiting plate 32. Both the first arc-shaped limiting plate 31 and the second arc-shaped limiting plate 32 are semi-circular. The first arc-shaped limiting plate 31 has a first connecting plate 311 on both sides, and the second arc-shaped limiting plate 32 has a second connecting plate 321 on both sides. The first connecting plate 311 and the second connecting plate 321 are provided with matching bolt holes. By passing bolts through the first connecting plate 311 and the second connecting plate 321, the connection between the first arc-shaped limiting plate 31 and the second arc-shaped limiting plate 32 can be realized, so that the first arc-shaped limiting plate 31 and the second arc-shaped limiting plate 32 are spliced ​​into a cylindrical shape, which is compatible with the first guide rail rod 111 and the second guide rail rod 121.

[0029] like Figure 8As shown, the first arc-shaped limiting plate 31 is provided with a first limiting flange 312, the second arc-shaped limiting plate 32 is provided with a second limiting flange 322, and the first guide rail rod 111 is provided with two sets of stroke limiting components 30. The first limiting flange 312 and the second limiting flange 322 limit the second limiting block 122 at the end of the second guide rail rod 121, thereby limiting the stroke of the second guide rail rod 121. The second guide rail rod 121 is provided with two sets of stroke limiting components 30. The first limiting flange 312 and the second limiting flange 322 limit the third limiting block 132 at the end of the third guide rail rod 131, thereby limiting the stroke of the third guide rail rod 131. This further prevents the guide rail movement from exceeding the predetermined stroke due to inertia during unloading, which is beneficial for the stable conduct of subsequent testing.

[0030] The multi-stage low-resistance unloading structure provided by this utility model includes a guide rail unit 10 and a linear adjustment component 20 disposed on the guide rail unit 10. The linear adjustment component 20 is movably disposed on the guide rail unit 10. When applied to a loop or umbrella-shaped deployable antenna, the loop or umbrella-shaped antenna can be deployed to a specified angle by the experimenter during performance testing in the deployed and retracted states. This realizes the function of simulating the difference between the theoretical and actual shape of the antenna when it is on track, thereby confirming and optimizing the electrical performance parameters of the antenna. The operation is flexible, which helps to improve the flexibility and operational stability of the loop or umbrella-shaped deployable antenna during electrical deployment / retraction testing, shortens the electrical testing time of the loop or umbrella-shaped deployable antenna, and improves the work efficiency of the test.

[0031] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A multi-stage low-resistance unloading structure, characterized in that, It includes a guide rail unit (10) and a linear adjustment component (20) disposed on the guide rail unit (10), the linear adjustment component (20) being movably disposed on the guide rail unit (10).

2. The multi-stage low-resistance unloading structure according to claim 1, characterized in that, The guide rail unit (10) includes a primary guide rail assembly (11), a secondary guide rail assembly (12), and a tertiary guide rail assembly (13). The secondary guide rail assembly (12) is movably connected to the primary guide rail assembly (11), and the tertiary guide rail assembly (13) is movably connected to the secondary guide rail assembly (12).

3. The multi-stage low-resistance unloading structure according to claim 2, characterized in that, The first-level guide rail assembly (11) includes a first guide rail rod (111) and a first limiting block (112) disposed at the end of the first guide rail rod (111); the second-level guide rail assembly (12) includes a second guide rail rod (121) and a second limiting block (122) disposed at the end of the second guide rail rod (121); the third-level guide rail assembly (13) includes a third guide rail rod (131) and a third limiting block (132) disposed at the end of the third guide rail rod (131).

4. The multi-stage low-resistance unloading structure according to claim 3, characterized in that, The guide rail unit (10) further includes an interstage sliding assembly (14), which includes a support base (141) and a movable seat (142) connected to the support base (141). The support base (141) has a through hole (143), and the movable seat (142) has a sliding groove (144). The sliding groove (144) has an opening (145), and sliding bearings (146) are provided on both sides of the opening (145).

5. The multi-stage low-resistance unloading structure according to claim 4, characterized in that, The support base (141) is provided with a first connecting protrusion (147), the movable base (142) is provided with a second connecting protrusion (148), a connecting bolt (15) is provided between the first connecting protrusion (147) and the second connecting protrusion (148), the second connecting protrusion (148) is provided with a threaded hole (149) adapted to the connecting bolt (15), and a connecting nut (16) is screwed on the connecting bolt (15).

6. The multi-stage low-resistance unloading structure according to claim 3, characterized in that, The linear adjustment assembly (20) includes an adjustment adapter (21), a left-hand screw (22), a left-hand and right-hand threaded sleeve (23), and a right-hand screw (24). The adjustment adapter (21) is connected to one end of the left-hand screw (22). The end of the left-hand screw (22) away from the adjustment adapter (21) is movably connected to the left-hand and right-hand threaded sleeve (23). One end of the right-hand screw (24) is movably connected to the left-hand and right-hand threaded sleeve (23). The other end of the right-hand screw (24) is connected to the first guide rail rod (111). The adjustment adapter (21) is provided with a waist-shaped hole (211).

7. The multi-stage low-resistance unloading structure according to claim 6, characterized in that, The first guide rail rod (111) is provided with a mounting hole (113), the right-hand screw (24) passes through the mounting hole (113), the right-hand screw (24) is provided with a special-shaped washer (25), the special-shaped washer (25) is located on both sides of the first guide rail rod (111), the side of the special-shaped washer (25) close to the first guide rail rod (111) is arc-shaped, the two ends of the left-hand and right-hand threaded sleeve (23) are provided with locking nuts (26), and the right-hand screw (24) is provided with fastening nuts (27).

8. The multi-stage low-resistance unloading structure according to claim 7, characterized in that, It also includes a travel limit component (30), which includes a first arc-shaped limit plate (31) and a second arc-shaped limit plate (32). The first arc-shaped limit plate (31) has a first connecting plate (311) on both sides, and the second arc-shaped limit plate (32) has a second connecting plate (321) on both sides.

9. The multi-stage low-resistance unloading structure according to claim 8, characterized in that, The first arc-shaped limiting plate (31) is provided with a first limiting flange (312), and the second arc-shaped limiting plate (32) is provided with a second limiting flange (322).

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