Ultra-light high-rigidity multifunctional unfolding mechanism capable of transmitting signals

Abstract

The invention discloses an ultra-light high-rigidity multifunctional unfolding mechanism capable of transmitting signals. Metal thin strips with equal diameters and equal helical angles are adopted, and high elasticity energy is stored when the metal thin strips are folded; the thin-walled tube is formed in an unfolded state and has high rigidity; after being unfolded, the signal transmission cable is fixed and supported through the root and the two auxiliary supporting points, and when being in a folded state, the signal transmission cable is folded in the cable winding cylinder and stored in the metal thin-walled tube when being unfolded; the metal thin-walled pipe is installed in the storage tank through the root reinforcing piece and supported through the root and the supporting component when unfolded, and the cable winding barrel is installed at the bottom of the storage tank. The multifunctional unfolding mechanism has the advantages that the unfolding length ranges from 0.5 m to 2.5 m, the folding size is smaller than phi 0.015 m * 0.15 mm, the mass is smaller than 1.2 kg, the load weight is larger than 100 g, the fundamental frequency is larger than 3 Hz, and the multifunctional unfolding mechanism is ultra-small in storage size, ultra-light in mass, high in rigidity, good in heat stability and the like.

Description

Technical Field

[0001] The present invention relates to an ultra-lightweight, high-rigidity, and signal-transmitting multifunctional deployment mechanism, belonging to the technical field of satellite-borne deployment mechanisms. Background Art

[0002] With the rapid development of space technology, especially the rapid development of deep space exploration, the demand for magnetic field and electric field detection is increasing. In order to meet the working needs of the payload, these detections need to use a deployment mechanism to deploy payloads such as magnetometers and electric field meters to a certain distance from the celestial body.

[0003] In a satellite-borne flexible ultra-light foldable carbon fiber extension rod with Chinese patent application number CN201710480484.8, a number of oblong holes are provided on the carbon fiber rod to realize the folding and unfolding of the extension rod. This folding rod type unfolding mechanism has a relatively large folded volume and requires a set of special compression and release devices, which results in a relatively heavy product quality. Aerospace products, especially deep space exploration, have strict requirements on lightweight and storage volume. Therefore, in order to meet the needs of deep space scientific exploration and maximize the detection capability of a single deep space exploration mission, a linear unfolding mechanism with a small storage volume, light weight, and signal transmission is needed to facilitate the layout of the unfolding mechanism. In order to solve the above problems, the present invention proposes an ultra-lightweight, high-rigidity, signal-transmitting unfolding mechanism, which adopts an integrated support design. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a linear expansion mechanism with small storage volume, light weight and signal transmission capability.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] An ultra-lightweight, high-rigidity, multifunctional deployment mechanism capable of signal transmission adopts a metal strip with equal diameter and equal helix angle. The metal strip stores high elastic energy when folded; in the unfolded state, it forms a thin-walled tube with high rigidity; after unfolding, it is fixedly supported by the root and auxiliary support points. When the signal transmission cable is folded, it is folded into the cable reel, and is stored in the metal thin-walled tube when unfolded; the metal thin-walled tube is installed in the storage tank through the root reinforcement plate, and is supported by the root and support components when unfolded, and the cable reel is installed at the bottom of the storage tank.

[0007] The invention discloses an ultra-lightweight, high-rigidity, signal-transmitting multifunctional deployment mechanism, which is mainly composed of a guide rod, a metal thin strip, a guide device, a storage tank assembly, a pin puller and a cable winding drum assembly.

[0008] The metal strip is made of stainless steel strip, the strip width is 50mm to 80mm, and the strip thickness is 0.05mm to 0.15mm.

[0009] A root reinforcement strip is added between the metal strip and the storage tank, and the metal strip, the reinforcement strip and the storage tank are connected by only one connecting screw; while the root reinforcement strip is connected to the storage tank by two connecting screws.

[0010] The expanded thin-walled metal tube is positioned in a directional manner through the root fixing point and auxiliary support points;

[0011] The cable drum storage solution with spiral inner and outer sleeves avoids the misalignment of the composite cable during vibration, while ensuring that the cable can be extended, avoiding the use of slip rings.

[0012] An electric field probe or a magnetic field probe can be installed at its front end to realize signal transmission and have the function of electrical transmission.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] (1) The multifunctional unfolding mechanism of the present invention has an unfolded length of 0.5m to 2.5m, a folded volume less than Ø0.015m×0.15mm, a mass less than 1.2kg, a load weight greater than 100g, and a fundamental frequency greater than 3Hz. It has the advantages of ultra-small storage volume, ultra-light mass, high rigidity, and good thermal stability.

[0015] (2) The multifunctional unfolding mechanism of the present invention reduces the bandwidth of the metal strip, thereby reducing the volume and mass of the metal strip.

[0016] (3) The multifunctional unfolding mechanism of the present invention is optimized accordingly on the basis of the existing technology, eliminating the elastic adaptive auxiliary support and replacing it with a limit constraint support, thereby simplifying the mechanism and reducing the mass of the storage tank assembly.

[0017] (4) The multifunctional unfolding mechanism cable reel assembly of the present invention adopts the method of inner lining of the cable reel body to coil the composite cable in the cable reel, which avoids the use of slip ring to release the composite cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is an axonometric view of the three-dimensional structure of the present invention in an unfolded state;

[0019] Figure 2 This is an axonometric view of the three-dimensional structure of the present invention in a folded state;

[0020] Figure 3 It is a front view of the folded state of the present invention;

[0021] Figure 4 Schematic diagram of the metal strip in the present invention in a gathered state;

[0022] Figure 5Schematic diagram of the connection between the metal strip in the unfolded state and the guide rod in the present invention;

[0023] Figure 6 This is a physical picture of the metal strip in a fully expanded state;

[0024] Figure 7 Schematic diagram of the guide rod;

[0025] Figure 8 This is a schematic diagram of the storage tank component in its expanded state;

[0026] Figure 9 Schematic diagram of the guide device;

[0027] Figure 10 Schematic diagram before unlocking the pin puller;

[0028] Figure 11 Schematic diagram of the pin puller after unlocking.

[0029] Figure 12 Schematic diagram of the cable reel assembly.

[0030] Figure markings: guide rod-101, metal strip-102, guide device-103, storage tank assembly-104, pin puller-105, cable reel assembly-106, rod body-701, locking nut-702, top plate-801, extension rod-802, middle plate-803, fixing tube-804, storage tank mounting plate-805, limit device-806, storage tank-807, bottom plate-808, lock body-1002, pin body-1001, cable reel body-1201, cable reel lining-1202, cable reel base-1203, micro switch-1204. DETAILED DESCRIPTION

[0031] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0032] An ultra-lightweight, high-rigidity, and multifunctional deployment mechanism capable of signal transmission is mainly composed of a guide rod 101, a metal strip 102, a guide device 103, a storage tank assembly 104, a pin puller 105, and a cable reel assembly 106. Figure 1 shown.

[0033] The guide rod 101 is a cylindrical body, which is composed of a rod body 701 and a locking nut 702. The locking nut 702 is connected to the rod body 701 by a thread. There are two holes (hole A and hole B) on the rod body 701. Figure 7As shown, the rod body 701 is screwed together with the innermost hole of the metal strip 102 through the hole A, and the metal strip 102 is screwed together with the hole on the storage tank 807 in the storage tank assembly 104 through the hole of the outermost thin strip. The storage tank assembly 104 is composed of a top plate 801, an extension rod 802, a middle plate 803, a fixing tube 804, a storage tank mounting plate 805, a limit device 806, a storage tank 807 and a bottom plate 808. Figure 8 As shown, three fixed tubes 804 and storage tank 807 are screwed to bottom plate 808, storage tank mounting plate 805 is screwed to storage tank 807, limiting device 806 is screwed to storage tank mounting plate 805, middle plate 803 is screwed to fixed tube 804, three extension rods 802 are connected to fixed tube 804 by sliding pairs, and driving springs are installed in fixed tube 804, top plate 801 is screwed to extension rod 802, bottom plate 808 has a hole at the center for guide rod 101 to pass through, and pin puller 105 and cable winding drum assembly 106 are installed on bottom plate 808 by screws, as shown in FIG. Figure 2 and Figure 3 As shown. The pin puller 105 includes a lock body 1002 and a pin body 1001. Figure 10 and Figure 11 As shown, the pin body 1001 and the lock body 1002 are connected by a sliding pair. The cable drum assembly 106 is composed of a cable drum body 1201, a cable drum lining 1202, a cable drum base 1203 and a micro switch 1204. Figure 12 As shown, the cable drum body 1201 and micro switch 1204 are mounted on the cable drum base 1203. The cable drum liner 1202 is mounted within the cable drum body 1201. When the deployment mechanism is retracted, the composite cable is stored by the cable drum assembly 106. The guide device 103 is mounted on the top plate 801 of the storage tank assembly 104.

[0034] The following combination Figures 1 to 12 The present invention is further described.

[0035] (1) First, the metal strip 102 is rolled up from the unfolded state to a stacked cylindrical shape (such as Figure 4 ), guide rod 101 and extension rod 802 of storage tank assembly 104 are also retracted. After guide rod 101 passes through the center hole of base plate 808, pin 1001 passes through hole B of guide rod 101, securing guide rod 101. Tightening locknut 702 tightens the mechanism. In the retracted state, the metal strip 102 is compressed and significantly deformed, storing elastic potential energy. When retracted, the composite cable is neatly arranged on cable reel assembly 106.

[0036] (2) When the deployment mechanism is in the folded state, the sliding pair between the pin body 1001 and the lock body 1002 is fixed. When the deployment mechanism is ready to be deployed, the pin puller 105 is energized and detonated, causing the pin body 1001 to be retracted into the lock body 1002 along the sliding pair with the lock body 1002, thereby releasing the constraint on the guide rod 101B hole.

[0037] (3) After the constraint of the guide rod 101B hole is released, the extension rod 802 of the storage tank assembly 104 is extended along the sliding pair under the action of the driving spring inside the fixed tube 804 to pull the guide rod 101 to expand, promoting the first few turns of the metal strip 102 to form a complete thin-walled tube. The metal strip 102 is extended in sequence under the action of its own stored elastic potential energy, and the opening of the transition section of the metal strip 102 is contracted by the bell mouth of the guide device 103 (such as Figure 9 As shown), during the deployment process, the storage tank assembly 104 and the guide device 103 provide protection and support for the transition section of the metal strip 102 in the thin-walled tube.

[0038] (4) When the metal strip 102 in the storage tank assembly 104 is completely released, the thin-walled tube formed by the metal strip 102 forms a continuous conductor, thereby playing the role of a rod antenna, such as Figure 5 and Figure 6 shown.

[0039] This solution provides a set of special cases:

[0040] The unfolded length of the unfolding mechanism is 5000mm, the folded volume is 350mm×150mm×1120mm, the unfolding mechanism weighs 3.0kg, the metal strip is formed of 0.1mm stainless steel material, and the diameter of the thin-walled tube in the unfolded state is between 15mm and 40mm.

[0041] The contents not described in detail in the specification of the present invention belong to the common knowledge of those skilled in the art.

[0042] Although the present invention has been disclosed above in terms of preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications to the technical solutions of the present invention by using the methods and technical contents disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention shall fall within the scope of protection of the technical solutions of the present invention.

Claims

1. An ultra-lightweight, high-rigidity, multifunctional deployment mechanism capable of signal transmission, characterized in that: It comprises a guide rod (101), a metal thin strip (102), a guide device (103), a storage tank assembly (104), a pin puller (105), and a cable winding drum assembly (106); The storage tank assembly (104) comprises a top plate (801), an extension rod (802), a middle plate (803), a fixed pipe (804), a storage tank mounting plate (805), a limiting device (806), a storage tank (807), and a bottom plate (808); the fixed pipe (804) and the storage tank (807) are mounted on the bottom plate (808), the storage tank mounting plate (805) is mounted on the storage tank (807), the limiting device (806) is mounted on the storage tank mounting plate (805), and the middle plate (803) is mounted on the storage tank. The top plate (801) is mounted on the extension rod (802), the extension rod (802) and the extension rod (804) are connected by a sliding pair, and a driving spring is installed in the extension rod (804). The top plate (801) is mounted on the extension rod (802), a hole is opened at the center of the bottom plate (808) so that the guide rod (101) can pass through, and a pin puller (105) and a cable winding drum assembly (106) are installed on the bottom plate (808); a guide device (103) is installed on the top plate (801) for controlling the opening of the metal strip (102); The guide rod (101) is a cylindrical body, comprising a rod body (701) and a locking nut (702). The locking nut (702) and the rod body (701) are connected by a thread. A hole A and a hole B are formed on the rod body (701). The rod body (701) is connected to the innermost hole of the metal strip (102) through the hole A. The metal strip (102) is connected to the hole on the storage tank (807) through the hole of the outermost thin strip. The pin puller (105) comprises a lock body (1002) and a pin body (1001). The pin body (1001) and the lock body (1002) are connected by a sliding pair. The pin body (1001) can be inserted into the hole B of the rod body (701). When the unfolding mechanism is folded, the composite cable is stored by the cable winding drum assembly (106).

2. The multifunctional deployment mechanism according to claim 1, characterized in that: When the unfolding mechanism is folded, the metal strip (102) is folded from the unfolded state to the stacked cylindrical shape, and the guide rod (101) and the extension rod (802) are also in the folded state. After the guide rod (101) passes through the center hole on the bottom plate (808), the B hole of the rod body (701) is passed through by the pin body (1001), and the sliding pair between the pin body (1001) and the lock body (1002) is fixed, so that one end of the guide rod (101) is fixed and the other end is tightened with the locking nut (702) to achieve the compression of the mechanism; in the folded state, the metal strip (102) is compressed and produces a large deformation, thereby storing elastic potential energy.

3. The multifunctional deployment mechanism according to claim 2, characterized in that: When the deployment mechanism is ready to deploy, the pin puller (105) is powered on and detonated, causing the pin body (1001) to be retracted into the lock body (1002) along the sliding pair with the lock body (1002), thereby releasing the constraint on the B hole of the rod body (701).

4. The multifunctional deployment mechanism according to claim 3, characterized in that: After the constraint of hole B of the rod body (701) is released, the extension rod (802) is extended along the sliding pair to traction the rod body (701) under the action of the driving spring inside the fixed tube (804), thereby promoting the first few circles of the metal strips (102) to form a complete thin-walled tube. The metal strips (102) are extended in sequence under the action of their own stored elastic potential energy.

5. The multifunctional deployment mechanism according to claim 4, characterized in that: The opening of the transition section of the metal strip (102) is contracted by the bell mouth of the guide device (103), and the storage tank assembly (104) and the guide device (103) provide protection and support for the transition section of the metal strip (102) in the thin-walled tube during the expansion process.

6. The multifunctional deployment mechanism according to claim 5, characterized in that: When the metal strip (102) in the storage tank assembly (104) is completely released, the thin-walled tube formed by the metal strip (102) becomes a continuous conductor, thereby playing the role of a rod antenna.

7. The multifunctional deployment mechanism according to claim 1, characterized in that: The cable drum assembly (106) comprises a cable drum body (1201), a cable drum lining (1202), a cable drum base (1203), and a micro switch (1204). The cable drum body (1201) and the micro switch (1204) are mounted on the cable drum base (1203), and the cable drum lining (1202) is mounted in the cable drum body (1201).

8. The multifunctional deployment mechanism according to claim 1, characterized in that: The metal strip (102) is made of stainless steel strip.

9. The multifunctional deployment mechanism according to claim 1, characterized in that: A root reinforcement belt is provided between the metal strip (102) and the storage tank (807), and the metal strip (102), the reinforcement belt and the storage tank (807) are connected by only one connecting screw; the root reinforcement belt is connected to the storage tank (807) by two connecting screws.

10. The multifunctional deployment mechanism according to claim 9, characterized in that: The metal thin strip (102) is a metal thin-walled tube in an unfolded state, and directional positioning is achieved through a root fixing point and a guide device (103).

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