A fixed-diameter variable-diameter externally-driven sleeve deployment device

Abstract

The present invention discloses a fixed variable-diameter external drive sleeve deployment device, which is used for deploying sleeve assemblies that are sequentially sleeved and deployed along the axial direction. The device comprises: a second pre-tightening drive assembly uniformly distributed along the circumference of the sleeve assembly; a second power assembly that can be sleeved on the outside of the sleeve assembly; a fixed end of the second pre-tightening drive assembly is fixedly connected to the outermost sleeve of the sleeve assembly; the second power assembly is fixedly connected to the outermost sleeve of the sleeve assembly, and its output end is transmission-connected to the input end of the second pre-tightening drive assembly; a driving mechanism is configured at the output end of the second pre-tightening drive assembly, and the driving mechanism abuts against the outer wall of the center sleeve of the sleeve assembly. The present invention has the beneficial effects of compact structure, high reliability, large deployment driving force, high deployment ratio and easy control.

Description

Technical Field

[0001] The present invention relates to the technical field of variable structure space remote sensors, and particularly to a fixed-diameter variable outer-drive sleeve deployment device. Background Art

[0002] Currently, in order to break through the limitation of launch capacity and build a space remote sensor with a larger aperture in orbit, space deployable remote sensors have become a new development direction. The basic principle of this technical route is that before launch, the system is folded orderly to reduce the occupied space, and after entering orbit, it automatically unfolds and reorganizes to achieve the imaging ability of the equivalent designed aperture. To realize the deformation of space deployable remote sensors, a deployment mechanism is required for driving. The traditional space deployment mechanisms mainly include articulated truss type, thin-walled tube type, sleeve type, coiled type, and inflatable type.

[0003] The sleeve type has a relatively large moment of inertia of the cylinder cross-section, and due to a certain length of overlap retained between every two levels of cylinders, it has good stiffness and strength performance. By using carbon fiber materials with a small coefficient of linear expansion and mechanical limit devices, a very high positioning accuracy can be achieved, which is particularly suitable for the field of variable structure space cameras with high requirements for accuracy, stability, and stiffness.

[0004] According to different sleeve deployment methods, it can be divided into cable-driven type, lead screw-driven type, and thin-walled open-tube-driven type. The cable-driven method has the advantages of good deployment synchronization, simple structure and principle, and relatively light mass of the driving structure parts. However, in a microgravity environment, there is a risk of cables winding around each other, resulting in low reliability; affected by the elasticity of the cables, there are oscillations during the deployment process, making the system control difficult. The lead screw-driven type has prominent advantages such as simple principle, stable structure, high strength, and high deployment driving force. However, it has very high requirements for the machining accuracy of the lead screw and the assembly accuracy of the nut; limited by the manufacturing ability of the lead screw, the single-stage extension length of the sleeve cannot be very long, and the deployment-to-folding ratio is relatively low; it is prone to bending deformation, resulting in the mechanism getting stuck and low reliability. The thin-walled open-tube-driven method has a relatively large axial driving force; however, its deployment and retraction mechanism has a complex structure, large weight and structural size, and is inconvenient to use; after the thin-walled open tube is deployed, the deformation is asymmetric, causing the sleeve to rotate axially, squeezing the guiding mechanism, resulting in deformation of the deployment mechanism; moreover, the preparation of large-stroke thin-walled open tubes is difficult and the cost is very high. Summary of the Invention

[0005] The purpose of the present invention is to overcome the defects existing in the prior art, and provide a fixed-diameter variable outer-drive sleeve deployment device for completing the in-orbit deployment of multi-stage sleeves and realizing the in-orbit reorganization of ultra-large variable structure space remote sensors.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] The present invention discloses a fixed variable diameter outer drive sleeve deployment device, which is used to deploy sleeve assemblies that are sleeved in sequence and deployed along the axial direction, and comprises:

[0008] A second preload drive assembly uniformly distributed along the circumference of the sleeve assembly;

[0009] A second power assembly capable of being sleeved outside the sleeve assembly;

[0010] The fixed end of the second preload drive assembly is fixedly connected to the outermost sleeve of the sleeve assembly;

[0011] The second power assembly is fixedly connected to the outermost sleeve of the sleeve assembly, and the output end thereof is drivingly connected to the input end of the second preload drive assembly;

[0012] The output end of the second preload drive assembly is provided with a drive mechanism, and the drive mechanism abuts against the outer wall of the center-stage sleeve of the sleeve assembly.

[0013] Furthermore, it also includes a first preload drive assembly; and

[0014] A first power assembly capable of being sleeved outside the sleeve assembly;

[0015] The bottom end of the first pre-tightening drive assembly is rotatably connected to the second pre-tightening drive assembly, and the output end of the first pre-tightening drive assembly is provided with a driving mechanism, and the driving mechanism abuts against the outer wall of the center-level sleeve of the sleeve assembly;

[0016] The first power assembly is fixedly connected to the second power assembly, and an output end thereof is transmission-connected to an input end of the first preload drive assembly.

[0017] Further, the second preload drive assembly includes a base, a second support arm rotatably connected to the base, a second preload drive column slidably connected to the base, and a second preload connecting rod connected between the second preload drive column and the second support arm;

[0018] The second supporting arm is equipped with the driving mechanism, and the driving mechanism has a second driving wheel abutting against the outer wall of the center-stage sleeve.

[0019] Furthermore, the second power assembly includes a second preload motor fixedly connected to the base and a second preload drive ring parallel to the base;

[0020] The bottom end of the second pre-tightening driving column is fixedly connected to the second pre-tightening driving ring;

[0021] The power output shaft of the second preload motor is helically driven with the second preload drive ring through a lead screw.

[0022] Further, the first pre-tightening drive assembly includes a first support arm rotatably connected to the second support arm, a first pre-tightening drive column slidably connected to the base, and a first pre-tightening link connected between the first pre-tightening drive column and the first support arm;

[0023] The first support arm is provided with the drive mechanism, and the drive mechanism has a first drive wheel abutting against the outer wall of the central stage sleeve.

[0024] Further, the first power assembly includes a first pre-tightening motor fixedly connected to the base and a first pre-tightening drive ring parallel to the base;

[0025] The first pre-tightening drive ring is fixedly connected to the first pre-tightening drive column;

[0026] The power output shaft of the first pre-tightening motor is in screw transmission with the first pre-tightening drive ring through a lead screw.

[0027] Further, the first pre-tightening drive column penetrates through the second pre-tightening drive column and is slidably connected to the second pre-tightening drive column.

[0028] Further, the sleeve assembly includes an outer sleeve, at least one intermediate sleeve sleeved inside the outer sleeve, and a central sleeve sleeved inside the intermediate sleeve;

[0029] The bottom end of the outer sleeve is fixedly connected with an outer connection ring,

[0030] Both the top end of the outer sleeve and the top end of the intermediate sleeve are fixedly connected with locking rings;

[0031] Both the bottom ends of the intermediate sleeve and the central sleeve are fixedly connected with limiting rings;

[0032] Wherein, the locking ring is provided with an interlocking pin, and both the outer walls of the intermediate sleeve and the central sleeve are provided with unfolding locking holes for engaging with the interlocking pin so as to keep the sleeve assembly unfolded;

[0033] Wherein, the locking ring is provided with a folding locking hole for accommodating the head end of the adjacent interlocking pin so as to keep the sleeve assembly folded.

[0034] Further, the side wall of the locking ring is provided with a mounting hole in a stepped structure for mounting the interlocking pin, the interlocking pin is a stepped shaft, and an elastic member for driving the interlocking pin to extend out and engage with the unfolding locking hole is installed in the mounting hole.

[0035] Further, when the sleeve assembly is in a folded state, the head end of the interlocking pin is exposed outside the locking ring, and the tail end of the interlocking pin abuts against the outer wall of the adjacent intermediate sleeve or the central sleeve.

[0036] In the above technical solution, a fixed-diameter variable-diameter outer-driven sleeve deployment device provided by the present invention has the following beneficial effects:

[0037] When the fixed-diameter variable-diameter inner-driven sleeve deployment device of the present invention is used for deployment, the structure is simple, and there will be no obvious technical obstacles in aspects such as design, manufacturing, assembly, and use due to the increase in the extension length of the sleeve; moreover, the driving mechanism is installed outside the sleeve, which can be applied to the deployment of small-diameter sleeves, with a higher expansion ratio, high integration, and convenient use; it has good scalability, with no limit on the length of a single-stage sleeve, so there is also no limit on the total extension length achieved by the sleeve; it does not require a guiding mechanism, with high reliability; the control is simple and the reliability is high. The present invention can be used in all occasions for driving the deployment of sleeves, especially in the field of space remote sensing where high deployment accuracy is required. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application or in the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0039] Figure 1 FIG. 13 is a schematic structural diagram of a fixed-diameter variable-diameter outer-driven sleeve deployment device disclosed by the present invention installed outside a sleeve assembly;

[0040] Figure 2 FIG. Figure 1 is a partial enlarged view of FIG.

[0041] Figure 3 FIG. 23 is an axonometric view of a fixed-diameter variable-diameter outer-driven sleeve deployment device disclosed by the present invention;

[0042] Figure 4 FIG. 27 is a front view of a fixed-diameter variable-diameter outer-driven sleeve deployment device disclosed by the present invention;

[0043] Figure 5 FIG. Figure 4 is a sectional view taken along line A-A of FIG.

[0044] Figure 6 FIG. 37 is a left view of a fixed-diameter variable-diameter outer-driven sleeve deployment device disclosed by the present invention;

[0045] Figure 7 FIG. 41 is a schematic structural diagram of a fixed-diameter variable-diameter outer-driven sleeve deployment device disclosed by the present invention assembled on a sleeve assembly in a deployed state of the sleeve assembly;

[0046] Figure 8 Figure 7 is a partial enlarged view of FIG.

[0047] Description of the reference numerals:

[0048] 1000, sleeve assembly;

[0049] 2000, first pre-tightening drive assembly;

[0050] 3000, second pre-tightening drive assembly;

[0051] 4000, first power assembly;

[0052] 5000, second power assembly;

[0053] 1, first drive motor; 2, first drive wheel; 3, first pre-tightening link; 301, first shaft; 302, fourth shaft; 4, first pre-tightening drive post; 5, first support arm; 6, first stepped shaft; 7, first fixing nut;

[0054] 8, second drive motor; 9, second drive wheel; 10, second pre-tightening drive post; 11, second pre-tightening link; 111, second shaft; 12, second support arm; 13, second stepped shaft; 14, second fixing nut; 15, third shaft;

[0055] 16, base;

[0056] 17, first pre-tightening drive ring; 171, first pre-tightening motor;

[0057] 18, second pre-tightening drive ring; 181, second pre-tightening motor;

[0058] 24, outer connection ring; 25, outer sleeve; 26, intermediate limit ring; 27, central limit ring; 28, central sleeve; 29, intermediate sleeve; 30, outer locking ring; 31, intermediate locking ring; 32, interlocking pin; 33, compression spring; 34, central connection ring; 35, deployment locking hole; 36, folding locking hole. Detailed implementation manners

[0059] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further introduced in detail below in conjunction with the accompanying drawings.

[0060] See Figure 1 as shown;

[0061] An invention relates to a fixed-diameter variable-diameter externally-driven sleeve deployment device, which is used to deploy a sleeve assembly 1000 that is sequentially sleeved and deployed along the axial direction externally;

[0062] The sleeve assembly 1000 is a multi-stage sleeve assembly, which includes an outer sleeve 25, a plurality of intermediate sleeves 29 and a central sleeve 28. The plurality of intermediate sleeves 29 are sleeved with each other in a decreasing diameter order. Among them, the outermost intermediate sleeve 29 is sleeved with the inner wall of the outer sleeve 25, and the central sleeve 28 is sleeved with the inner wall of the innermost intermediate sleeve 29;

[0063] See Figure 1 , 3 as shown;

[0064] The fixed-diameter external drive sleeve deployment device includes:

[0065] A second pre-tightening drive assembly 3000 evenly distributed circumferentially along the sleeve assembly 1000;

[0066] A second power assembly 5000 that can be sleeved outside the sleeve assembly 1000;

[0067] The fixed end of the second pre-tightening drive assembly 3000 is fixedly connected to the outermost sleeve of the sleeve assembly 1000;

[0068] The second power assembly 5000 is fixedly connected to the outermost sleeve of the sleeve assembly 1000, and its output end is drivingly connected to the input end of the second pre-tightening drive assembly 3000;

[0069] The output end of the second pre-tightening drive assembly 3000 is configured with a driving mechanism, and the driving mechanism abuts against the outer wall of the central sleeve of the sleeve assembly 1000.

[0070] Preferably, the fixed-diameter external drive sleeve deployment device further includes a first pre-tightening drive assembly 2000; and

[0071] A first power assembly 4000 that can be sleeved outside the sleeve assembly 1000;

[0072] The bottom end of the first pre-tightening drive assembly 2000 is rotatably connected to the second pre-tightening drive assembly 3000. The output end of the first pre-tightening drive assembly 2000 is configured with a driving mechanism, and the driving mechanism abuts against the outer wall of the central sleeve of the sleeve assembly 1000;

[0073] The first power assembly 4000 is fixedly connected to the second power assembly 5000, and its output end is drivingly connected to the input end of the first pre-tightening drive assembly 2000.

[0074] See Figure 1 , 4 as shown;

[0075] Preferably, the second preload drive assembly 3000 includes a base 16, a second support arm 12 rotatably connected to the base 16, a second preload drive column 10 slidably connected to the base 16, and a second preload connecting rod 11 connected between the second preload drive column 10 and the second support arm 12;

[0076] The second support arm 12 is equipped with a driving mechanism having a second driving wheel 9 abutting against the outer wall of the center stage sleeve.

[0077] Specifically, in this structure, the base 16 is fixedly connected to the top of the outermost sleeve of the sleeve assembly 1000, see Figure 5 As shown, the second support arm 12 includes two arm bodies of a plate-like structure and a second stepped shaft 13 for spacing the two arm bodies. The second stepped shaft 13 has second fixing nuts 14 fixedly connected at both ends for fixing the two arm bodies. The top end of the second support arm 12 is rotatably connected to the first support arm 5 through the second main shaft, and the bottom end of the second support arm 12 is rotatably connected to the base 16 through the third shaft 15.

[0078] See also Figure 4 As shown, one end of the second preload link 11 is rotatably connected to the second preload driving column 10 through a shaft, and the other end is rotatably connected to the second support arm 12 through a second shaft 111, and the second support arm 12 is driven by the second preload link 11;

[0079] The top of the second support arm 12 is rotatably connected to the second driving wheel 9 through the second main shaft, and a second driving motor 8 is fixedly connected to one side of the second support arm 12. The power output end of the second driving motor 8 is connected to the second main shaft. When working, the second driving motor 8 is started to drive the second driving wheel 9 to rotate;

[0080] See also Figure 1 , 4 Show;

[0081] Preferably, the second power assembly 5000 includes a second preload motor 181 fixedly connected to the base 16 and a second preload drive ring 18 parallel to the base 16;

[0082] The bottom end of the second preload driving column 10 is fixedly connected to the second preload driving ring 18;

[0083] The power output shaft of the second preload motor 181 is screw-driven with the second preload drive ring 18 through a lead screw.

[0084] For details, see Figure 4As shown, a second pre-tightening motor 181 is fixedly connected to the upper surface of the base 16. A second pre-tightening drive ring 18 is disposed below the base 16. A lead screw is fixedly connected to the power output shaft of the second pre-tightening motor 181. The lead screw is in screw drive connection with the second pre-tightening drive ring 18. During operation, the second pre-tightening motor 181 is started, driving the lead screw to rotate to drive the displacement of the second pre-tightening drive ring 18 and drive the second pre-tightening drive column 10 to move, so that the second support arm 12 is linked to provide a pre-tightening driving force for the second driving wheel 9;

[0085] See Figure 1 , 4 as shown;

[0086] Preferably, the first pre-tightening drive assembly 2000 includes a first support arm 5 rotatably connected to the second support arm 12, a first pre-tightening drive column 4 slidably connected to the base 16, and a first pre-tightening link 3 connected between the first pre-tightening drive column 4 and the first support arm 5;

[0087] A driving mechanism is installed on the first support arm 5, and the driving mechanism has a first driving wheel 2 that abuts against the outer wall of the central-stage sleeve.

[0088] Specifically, see Figure 5 as shown, the first support arm 5 includes two arm bodies in plate-like structures and a first stepped shaft 6 for spacing the two arm bodies. First fixing nuts 7 are fixedly connected to both ends of the first stepped shaft 6 for fixedly connecting the two arm bodies;

[0089] See Figure 4 as shown, one end of the first pre-tightening link 3 is rotatably connected to the first pre-tightening drive column 4 through a fourth shaft 302, and the other end is rotatably connected to the first support arm 5 through a first shaft 301, driving the first support arm 5 to be linked through the first pre-tightening link 3;

[0090] The top end of the first support arm 5 is rotatably connected with a first driving wheel 2 through a first main shaft. A first driving motor 1 is fixedly connected to one side of the first support arm 5. The power output end of the first driving motor 1 is connected to the first main shaft. During operation, the first driving motor 1 is started to drive the first driving wheel 2 to rotate;

[0091] See Figure 4 as shown;

[0092] Preferably, the first power assembly 4000 includes a first pre-tightening motor 171 fixedly connected to the base 16 and a first pre-tightening drive ring 17 parallel to the base 16;

[0093] The first pre-tightening drive ring 17 is fixedly connected to the first pre-tightening drive column 4;

[0094] The power output shaft of the first pre-tightening motor 171 is in screw drive connection with the first pre-tightening drive ring 17 through a lead screw.

[0095] Specifically, a first pre-tightening motor 171 is fixedly connected to the upper surface of the base 16. A first pre-tightening driving ring 17 is disposed parallel to the lower part of the base 16 and below the second pre-tightening driving ring 18. A lead screw is fixedly connected to the power output shaft of the first pre-tightening motor 171. The lead screw passes through the second pre-tightening driving ring 18 and is in screw transmission with the first pre-tightening driving ring 17. During operation, the first pre-tightening motor 171 is started, driving the lead screw to rotate to drive the displacement of the first pre-tightening driving ring 17 and drive the movement of the first pre-tightening driving column 4, so as to drive the first support arm 5 to move, providing a pre-tightening driving force for the first driving wheel 2. Among them, in order to ensure the compactness of the device structure, in a preferred embodiment, the first pre-tightening driving column 4 passes through the second pre-tightening driving column 10 and is slidably connected to the second pre-tightening driving column 1).

[0096] See Figure 1 、 7 as shown in

[0097] Preferably, the sleeve assembly 1000 includes an outer sleeve 25, at least one intermediate sleeve 29 sleeved inside the outer sleeve 25, and a central sleeve 28 sleeved inside the intermediate sleeve 29;

[0098] In this embodiment, there are multiple intermediate sleeves 29, and the structures of the multiple intermediate sleeves 29 are the same. The number of intermediate sleeves 29 can be increased or decreased according to design requirements (the embodiments of multiple intermediate sleeves 29 will be specifically described later);

[0099] The bottom end of the outer sleeve 25 is fixedly connected with an outer connection ring 24. The inner surface of the outer cylinder of the outer connection ring 24 is fixedly connected with the bottom end of the outer sleeve 25. Among them, when the sleeve assembly 1000 is folded, the lower surfaces of the bottom ends of the intermediate sleeve 29 and the central sleeve 28 can both contact the upper surface of the inner wall of the outer connection ring 24, and the length of the central sleeve 28 is greater than the length of the intermediate sleeve 29, so as to ensure that when the sleeve assembly 1000 is folded (the initial state of the sleeve assembly 1000), the driving wheel abuts against the outer surface of the central sleeve 28;

[0100] Locking rings are fixedly connected to the top ends of the outer sleeve 25 and the intermediate sleeve 29, and limiting rings are fixedly connected to the bottom ends of the intermediate sleeve 29 and the central sleeve 28. Specifically, the locking ring includes an outer locking ring 30 and an intermediate locking ring 31, and the limiting ring includes an intermediate limiting ring 26 and a central limiting ring 27. The intermediate limiting ring 26 and the central limiting ring 27 have the same structure and are both stepped;

[0101] The outer locking ring 30 is fixedly connected to the top end of the outer sleeve 25, and the bottom end of the intermediate sleeve 29 is fixedly connected to the inner surface of the outer cylinder of the intermediate limiting ring 26;

[0102] When the sleeve assembly 1000 is deployed, the outer sleeve 25 contacts the intermediate limit ring 26 at the bottom end of the intermediate sleeve 29 through the outer locking ring 30 and is mechanically limited to prevent the intermediate sleeve 29 from detaching from the outer sleeve 25. At the same time, it is ensured that the end of the interlocking pin 32 on the outer locking ring 30 slides into the locking hole 36 of the intermediate sleeve 29 under the action of the compression spring 33 to complete the locking after the outer sleeve 25 and the intermediate sleeve 29 are deployed;

[0103] An intermediate locking ring 31 is fixedly connected to the top end of the intermediate sleeve 29. The central sleeve 28 is fixedly connected to the inner surface of the outer cylinder of the central limit ring 27. A central connecting ring 34 is fixedly connected to the top end of the central sleeve 28, and the central sleeve 28 is covered by the central connecting ring 34;

[0104] When the sleeve assembly 1000 is deployed, the intermediate sleeve 29 contacts the central limit ring 27 at the bottom end of the central sleeve 28 through the intermediate locking ring 31 and is mechanically limited to prevent the central sleeve 29 from detaching from the intermediate sleeve 28. At the same time, it is ensured that the end of the interlocking pin 32 on the intermediate locking ring 31 slides into the deployment locking hole 36 of the central sleeve 28 under the action of the compression spring 33 to complete the locking after the intermediate sleeve 29 and the central sleeve 28 are deployed;

[0105] Among them, in this structure, the locking ring is provided with an interlocking pin 32. The outer locking ring 30 and the intermediate locking ring 31 have the same structure and are both provided with an interlocking pin 32. Deployment locking holes 35 are opened at the positions corresponding to the interlocking pin 32 on the outer walls of the intermediate sleeve 29 and the central sleeve 28 for engaging with the interlocking pin 32 to keep the sleeve assembly 1000 deployed. The deployment locking holes 35 can be multiple and are distributed along the circumferences of the intermediate sleeve 29 and the central sleeve 28. The number and positions of the interlocking pins 32 match the positions of the deployment locking holes 35;

[0106] Among them, folding locking holes 36 are opened on the locking ring for accommodating the leading ends of adjacent interlocking pins 32 to keep the sleeve assembly 1000 folded. Specifically, refer to Figure 8 As shown, the folding locking holes 36 are located above the mounting holes of the interlocking pins 32. The folding locking holes 36 have the same number as the deployment locking holes 35 and are both distributed along the circumferences of the intermediate sleeve 29 and the central sleeve 28;

[0107] Refer to Figure 2 As shown;

[0108] Preferably, the side wall of the limit ring is provided with a mounting hole in a stepped structure for mounting the interlocking pin 32. The interlocking pin 32 is slidably connected to the mounting hole. The structure of the interlocking pin 32 is a stepped shaft. An elastic member for driving the interlocking pin 32 to extend out and engage with the unfolded locking hole 35 is installed in the mounting hole. The elastic member is a compression spring 33 in the prior art. One end of the compression spring 33 abuts against the shoulder of the interlocking pin 32, and the other end abuts against the stepped end face formed by the mounting hole. The compression spring 33 extends to drive the end of the interlocking pin 32 to extend out of the mounting hole and expose on the inner wall side of the sleeve;

[0109] See Figure 1 as shown in

[0110] Preferably, when the sleeve assembly 1000 is in the folded state, the head end of the interlocking pin 32 is exposed outside the locking ring, and the tail end of the interlocking pin 32 abuts against the outer wall of the adjacent intermediate sleeve 29 or the central sleeve 28.

[0111] Specifically, under the action of the compression spring 33, when the sleeve assembly 1000 is in the folded state, the tail end of the interlocking pin 32 at the top of the intermediate sleeve 29 abuts against the outer wall of the central sleeve 28. The head end of the interlocking pin 32 is exposed outside the intermediate locking ring 31 and engages with the folding locking hole 36 on the adjacent intermediate locking ring 31 to lock the two adjacent intermediate sleeves 29, or the head end of the interlocking pin 32 is exposed outside the intermediate locking ring 31 and engages with the folding locking hole 36 on the adjacent outer locking ring 22 to lock the intermediate sleeve 29 and the outer sleeve 25;

[0112] Similarly, when the sleeve assembly 1000 is in the folded state, the tail end of the interlocking pin 32 at the top of the outer sleeve 25 abuts against the outer wall of the intermediate sleeve 29. The head end of the interlocking pin 32 is exposed outside the outer locking ring 22. Of course, in order to prevent the head end of the interlocking pin 32 on the outer locking ring 22 from interfering with other devices when exposed outside the outer locking ring 22, the outer locking ring 22 can hide the head end of the interlocking pin 32 on the outer locking ring 22 inside by increasing the wall thickness or other structural forms;

[0113] See Figure 1 as shown in

[0114] Examples of multiple intermediate sleeves 29:

[0115] The structures of several intermediate sleeves 29 are the same, and they are sleeved on each other in ascending order of diameter. Among them, the intermediate sleeve i (i represents the arrangement order of the intermediate sleeves, i is an integer greater than or equal to 1 and less than or equal to n, n is the total number of intermediate sleeves 29, and the smaller i is, the smaller the diameter of the corresponding intermediate sleeve 29);

[0116] The intermediate sleeve 29 includes a stepped intermediate limit ring 26 and an intermediate locking ring 31. The inner cylindrical surface of the intermediate limit ring 26 is fixedly connected to the intermediate sleeve i, and the other end of the intermediate sleeve i is fixedly connected to the intermediate locking ring 31. A plurality of stepped mounting holes are circumferentially and uniformly distributed on the intermediate locking ring 31. An interlocking pin 32 is slidably connected to the mounting holes, and a compression spring 33 is also installed in the mounting holes. The compression spring 33 is sleeved on the middle part of the interlocking pin 32, and one end abuts against the end face of the mounting hole, and the other end abuts against the shoulder end face of the interlocking pin 32.

[0117] Above the interlocking pin 32, the intermediate locking ring 31 is provided with folding locking holes 36. See Figure 7 , 8 As shown, at the bottom end of the intermediate sleeve i, an unfolding locking hole 35 is provided corresponding to the position of the interlocking pin 32 of the adjacent intermediate sleeve.

[0118] See Figure 1 , 2 As shown;

[0119] Multiple intermediate sleeves 29 are interlocked in the folded state;

[0120] For two adjacent intermediate sleeves j + 1 and j (j represents the arrangement order of the intermediate sleeves, and j is not equal to n and 1), the inner surface of the intermediate sleeve j + 1 is slidably connected to the outer surface of the intermediate sleeve j. The upper cylindrical surface of the interlocking pin 32 of the intermediate sleeve j cooperates with the folding locking hole 36 on the intermediate sleeve j + 1, and its lower end face abuts against the outer cylindrical surface of the intermediate sleeve j - 1, thereby interlocking the adjacent intermediate sleeves 29.

[0121] When j is 1 and j + 1 is 2, the inner surface of the intermediate sleeve 2 is slidably connected to the outer surface of the intermediate sleeve 1. The upper cylindrical surface of the interlocking pin 32 of the intermediate sleeve 1 cooperates with the folding locking hole 36 on the intermediate sleeve 2, and its lower end face abuts against the outer cylindrical surface of the central sleeve 28, without restricting the axial movement of the central sleeve 28.

[0122] When j is n, the inner surface of the outer sleeve 25 is slidably connected to the outer surface of the intermediate sleeve n. The upper cylindrical surface of the interlocking pin 32 of the intermediate sleeve n cooperates with the folding locking hole 36 on the outer sleeve 25, and its lower end face abuts against the outer cylindrical surface of the intermediate sleeve n - 1, thereby interlocking the two sleeves.

[0123] See Figure 7 , 8 As shown;

[0124] After two adjacent levels of sleeves are expanded to mechanical limits, the lower cylindrical surface of the interlocking pin 32 slides into the corresponding unfolding locking hole 35 under the action of the compression spring 33, completing the locking after the sleeve assembly is expanded.

[0125] In the above technical solution, the working principle of a fixed-diameter variable-diameter externally driven sleeve unfolding device provided by the present invention is as follows:

[0126] See Figure 1 as shown;

[0127] Initial state: The outer sleeve 25 and the intermediate sleeve 29 assembly are connected as a whole under the action of the interlocking pin 32 (abbreviated as whole 1).

[0128] The external control system starts the first pre-tightening motor 171 and the second pre-tightening motor 181. The first pre-tightening drive ring 17 and the second pre-tightening drive ring 18 rise upward, driving the first pre-tightening drive post 4 and the second pre-tightening drive post 10 to push the first support arm 5 and the second support arm 12, so that the first drive wheel 2 and the second drive wheel 9 are in contact with the outer wall of the central sleeve 28. The contact force can be calculated through current feedback. After the contact force meets the requirements, the first drive motor 1 and the second drive motor 8 are started, and the first drive wheel 2 and the second drive wheel 9 rotate. At this time, the contact friction force between the drive wheel and the outer wall of the sleeve is converted into the unfolding driving force of the whole 1. With the continuous unfolding movement, the mechanical limit between the central sleeve 28 assembly and the whole 1 is released, and the interlocking pin 32 in the whole 1 slides into the unfolding locking hole 32 on the central sleeve 28, completing the axial locking between the central sleeve 28 and the whole 1, and at the same time releasing the axial locking between the innermost intermediate sleeve 29 and the second innermost intermediate sleeve 29. In this way, the whole 1 is transformed into the whole 2 and continues the axial unfolding movement;

[0129] With the continuous unfolding movement, the second drive wheel 9 will touch the upper end face of the innermost intermediate sleeve 29, resulting in an increase in the contact force, thereby causing a sudden change in the current of the second drive motor 8. At this time, the first power assembly 4000 and the second power assembly 5000 cooperate to move. While keeping the first drive wheel 2 in effective contact with the central sleeve 28, the second drive wheel 9 is lifted, and only the first drive wheel 2 is used for axial unfolding. Continue the axial unfolding movement by one wheel pitch. The first power assembly 4000 and the second power assembly 5000 cooperate to move, so that the second drive wheel 9 is in contact with the outer surface of the whole 2. When the first drive wheel 2 also touches the upper end face of the innermost intermediate sleeve 29, the first power assembly 4000 and the second power assembly 5000 cooperate to move. While keeping the second drive wheel 9 in effective contact with the whole 2, the first drive wheel 2 is lifted, and only the second drive wheel 9 is used for axial unfolding. Continue the axial unfolding movement by one wheel pitch. The first power assembly 4000 and the second power assembly 5000 cooperate to move, so that the first drive wheel 2 is in contact with the outer surface of the whole 2, completing the inter-stage diameter change transition, and then continue the unfolding movement. Repeat the above unfolding actions until the sleeve assembly is completely unfolded.

[0130] Beneficial effects:

[0131] When the fixed-diameter inner-drive sleeve deployment device of the present invention is used for deployment, the structure is simple, and there will be no obvious technical obstacles in aspects such as design, manufacturing, assembly, and use due to the increase in the extended length of the sleeve. Moreover, the drive mechanism is installed outside the sleeve, which can be applied to the deployment of small-diameter sleeves, with a higher deployment ratio, high integration, and convenient use. It has good scalability and has no limit on the length of a single-stage sleeve, so there is also no limit on the total extended length achieved by the sleeve. It does not require a guiding mechanism and has high reliability. The control is simple and the reliability is high. The present invention can be used in all occasions where the sleeve is driven to deploy, especially in the field of space remote sensing where high deployment accuracy is required.

[0132] Only some exemplary embodiments of the present invention have been described above by way of illustration. Undoubtedly, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A fixed-diameter variable-drive outer sleeve deployment device is used to deploy a sleeve assembly (1000) that is sequentially sleeved and deployed along the axial direction. It is characterized in that, Comprising: A second pre-tightening drive assembly (3000) evenly distributed circumferentially along the sleeve assembly (1000); A second power assembly (5000) capable of being sleeved outside the sleeve assembly (1000); The fixed end of the second pre-tightening drive assembly (3000) is fixedly connected to the outermost sleeve of the sleeve assembly (1000); The second power assembly (5000) is fixedly connected to the outermost sleeve of the sleeve assembly (1000), and its output end is drivingly connected to the input end of the second pre-tightening drive assembly (3000); The output end of the second pre-tightening drive assembly (3000) is configured with a driving mechanism, and the driving mechanism abuts against the outer wall of the central sleeve of the sleeve assembly (1000); In the working state, the second pre-tightening drive assembly (3000) drives the driving mechanism, and the contact friction force between the driving mechanism and the outer wall of the central sleeve is converted into the driving force for the sleeve to expand.

2. The fixed-diameter variable-diameter outer drive sleeve deployment device according to claim 1, wherein ； It further comprises a first pre-tightening drive assembly (2000); and A first power assembly (4000) capable of being sleeved outside the sleeve assembly (1000); The bottom end of the first pre-tightening drive assembly (2000) is rotatably connected to the second pre-tightening drive assembly (3000), the output end of the first pre-tightening drive assembly (2000) is configured with a driving mechanism, and the driving mechanism abuts against the outer wall of the central sleeve of the sleeve assembly (1000); The first power assembly (4000) is fixedly connected to the second power assembly (5000), and its output end is drivingly connected to the input end of the first pre-tightening drive assembly (2000).

3. A fixed-diameter variable-diameter externally-driven sleeve deployment device according to claim 2, It is characterized in that; The second pre-tightening drive assembly (3000) includes a base (16), a second support arm (12) rotatably connected to the base (16), a second pre-tightening drive column (10) slidably connected to the base (16), and a second pre-tightening link (11) connected between the second pre-tightening drive column (10) and the second support arm (12); The driving mechanism is installed on the second support arm (12), and the driving mechanism has a second driving wheel (9) abutting against the outer wall of the central sleeve.

4. A fixed-diameter variable-diameter outer-drive sleeve deployment device according to claim 3, It is characterized in that; The second power assembly (5000) includes a second pre-tightening motor (181) fixedly connected to the base (16) and a second pre-tightening drive ring (18) parallel to the base (16); The bottom end of the second pre-tightening drive column (10) is fixedly connected to the second pre-tightening drive ring (18); The power output shaft of the second pre-tightening motor (181) is in screw drive with the second pre-tightening drive ring (18) through a lead screw.

5. A fixed-diameter variable-diameter outer-drive sleeve deployment device according to claim 3, It is characterized in that; The first pre-tightening drive assembly (2000) includes a first support arm (5) rotatably connected to the second support arm (12), a first pre-tightening drive column (4) slidably connected to the base (16), and a first pre-tightening link (3) connected between the first pre-tightening drive column (4) and the first support arm (5); The driving mechanism is installed on the first support arm (5), and the driving mechanism has a first driving wheel (2) abutting against the outer wall of the central sleeve.

6. A fixed-diameter variable-diameter outer drive sleeve deployment device according to claim 5, It is characterized in that; The first power assembly (4000) includes a first pre-tightening motor (171) fixedly connected to the base (16) and a first pre-tightening drive ring (17) parallel to the base (16); The first pre-tightening drive ring (17) is fixedly connected to the first pre-tightening drive column (4); The power output shaft of the first pre-tightening motor (171) is in screw drive with the first pre-tightening drive ring (17) through a lead screw.

7. A fixed-diameter variable-diameter outer-drive sleeve deployment device according to claim 6, It is characterized in that; The first pre-tightening drive column (4) penetrates through the second pre-tightening drive column (10) and is slidably connected to the second pre-tightening drive column (10).

8. A fixed-diameter variable-diameter outer drive sleeve deployment device according to claim 1, characterized in that ； The sleeve assembly (1000) includes an outer sleeve (25), at least one intermediate sleeve (29) sleeved inside the outer sleeve (25), and a central sleeve (28) sleeved inside the intermediate sleeve (29); The bottom end of the outer sleeve (25) is fixedly connected with an outer connection ring (24), Locking rings are fixedly connected to the top ends of both the outer sleeve (25) and the intermediate sleeve (29); Limiting rings are fixedly connected to the bottom ends of both the intermediate sleeve (29) and the central sleeve (28); Wherein, the locking ring is provided with an interlocking pin (32), and expansion locking holes (35) are formed in the outer walls of both the intermediate sleeve (29) and the central sleeve (28) for engaging with the interlocking pin (32) to keep the sleeve assembly (1000) in an expanded state; Wherein, folding locking holes (36) are formed in the locking ring for accommodating the leading ends of adjacent interlocking pins (32) to keep the sleeve assembly (1000) in a folded state.

9. The fixed-diameter variable-diameter outer drive sleeve deployment device according to claim 8, characterized in that ； The side wall of the locking ring is provided with a mounting hole in a stepped structure for mounting the interlocking pin (32). The interlocking pin (32) is a stepped shaft, and an elastic member for driving the interlocking pin (32) to extend out and engage with the expansion locking hole (35) is installed in the mounting hole.

10. A fixed-diameter variable-diameter outer-drive sleeve deployment device according to claim 8, characterized in that ； When the sleeve assembly (1000) is in a folded state, the leading end of the interlocking pin (32) is exposed outside the locking ring, and the trailing end of the interlocking pin (32) abuts against the outer wall of the adjacent intermediate sleeve (29) or central sleeve (28).

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