A fixed variable diameter inner drive sleeve deployment device

Abstract

The present invention discloses a fixed variable-diameter inner-drive sleeve deployment device, which is used for deploying a sleeve assembly which is sequentially sleeved and deployed along an axial direction. The device comprises: a variable-diameter pre-tightening drive assembly arranged inside the sleeve assembly; and a first connecting seat which carries the variable-diameter pre-tightening drive group; an adapter column is fixedly connected inside the sleeve assembly; the top end of the adapter column is fixedly connected to the first connecting seat through a second connecting seat, so as to support the variable-diameter pre-tightening drive assembly away from the adapter column and be mounted inside the sleeve assembly; wherein, at least one end of the first connecting seat is fixedly connected to the variable-diameter pre-tightening drive assembly; the variable-diameter pre-tightening drive assembly is configured with a plurality of support arms distributed along the circumference of the sleeve inner diameter of the sleeve assembly; the deployment drive assembly installed at the end of the support arm can rollably abut against the inner wall of the sleeve of the sleeve assembly through a driving wheel, thereby driving the sleeve assembly to deploy. The present invention has the advantages of simple structure, high integration, convenient use, good scalability, large deployment ratio and high reliability.

Description

Technical Field

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

[0002] At present, in order to break through the limitation of carrying capacity and build larger caliber space remote sensors 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 in order to reduce the space it occupies, and after entering orbit, it is automatically unfolded and reorganized to achieve imaging capabilities equivalent to the design caliber. To realize the deformation of space deployable remote sensors, an unfolding mechanism is required to drive them. Traditional space unfolding mechanisms mainly include articulated truss type, thin-walled tube type, sleeve type, coiled type and inflatable type.

[0003] The sleeve type has good stiffness and strength properties due to the large moment of inertia of the cylinder section and a certain length of overlap between each two stages of the cylinder. By using carbon fiber materials with a small linear expansion coefficient and mechanical limit devices, high positioning accuracy can be achieved. It is particularly suitable for the field of variable structure space cameras that require high accuracy, stability and stiffness.

[0004] According to the different ways of sleeve deployment, it can be divided into rope drive, screw drive and thin-walled open tube drive. The rope drive has the advantages of good deployment synchronization, simple structure and principle, and light weight of driving structure. However, in a microgravity environment, there is a risk of ropes getting entangled with each other, and the reliability is low; affected by the elasticity of the ropes, there are oscillations in the deployment process, and the system control is difficult. The screw drive has the outstanding advantages of simple principle, stable structure, high strength, and high deployment driving force. However, it has very high requirements on the processing accuracy of the screw and the assembly accuracy of the nut; limited by the manufacturing capacity of the screw, the single-stage extension length of the sleeve cannot be very long, and the unfolding ratio is relatively low; it is easy to bend and deform, resulting in the jamming of the mechanism, and the reliability is not high. The thin-walled open tube drive has a large axial driving force; but its unfolding and retracting mechanism has a complex structure, large weight and structural size, and is inconvenient to use; the thin-walled open tube is asymmetrically deformed after deployment, causing the sleeve to rotate axially, squeezing the guide mechanism, and causing the deployment mechanism to deform; moreover, the preparation of a long-stroke thin-walled open tube is difficult and the cost is very high. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the prior art and provide a fixed variable diameter inner drive sleeve deployment device for completing the on-orbit deployment of a multi-stage sleeve and realizing the on-orbit reorganization of a super-large variable structure space remote sensor.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

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

[0008] A variable diameter preload drive assembly disposed inside the sleeve assembly; and

[0009] A first connecting seat carrying the variable diameter preload drive assembly;

[0010] A transfer column is fixedly connected in the sleeve assembly;

[0011] The top end of the adapter column is fixedly connected to the first connection seat through a second connection seat, so as to support the variable diameter preload drive assembly away from the adapter column and mounted inside the sleeve assembly;

[0012] Wherein, at least one end of the first connecting seat is fixedly connected to the variable diameter pre-tightening drive assembly;

[0013] The variable diameter preload drive assembly is provided with a plurality of support arms uniformly distributed circumferentially along the axis of the sleeve assembly;

[0014] The unfolding driving assembly installed at the end of the support arm can rollably contact with the inner wall of the sleeve assembly through the driving wheel, thereby driving the sleeve assembly to unfold.

[0015] Furthermore, the end of the support arm is rotatably connected to the driving wheel, the head end of the support arm is rotatably connected to the first connecting seat, and the head end of the support arm is also provided with a flexible structure for causing the support arm to produce a flexible deformation corresponding to the preload torque it is subjected to.

[0016] Furthermore, the variable diameter preload drive assembly further comprises a preload worm, which is used to drive the plurality of support arms to synchronously apply a force toward the inner wall of the sleeve of the sleeve assembly;

[0017] The plurality of support arms are evenly distributed circumferentially with the preloaded worm as the center;

[0018] The head end of the support arm is fixedly connected with a pre-tightening worm wheel for meshing with the pre-tightening worm;

[0019] The preloaded worm gear is provided with a second shaft, and both ends of the second shaft are connected to the flexible structure.

[0020] Furthermore, the flexible structure includes a deformable beam, a connecting ring formed at one end of the deformable beam, and a flexible hole opened on the support arm;

[0021] The deformable beam is fixedly connected to the inner wall of the flexible hole away from the end of the connecting ring;

[0022] The connecting ring is connected to the second shaft;

[0023] The shape of the flexible hole is adapted to the shape of the deformable beam and the connecting ring, and a gap is formed between the inner wall of the flexible hole and the side wall of the deformable beam and the connecting ring, and a force measuring strain gauge is installed in the gap.

[0024] Furthermore, the support arm includes two arm bodies arranged parallel to each other;

[0025] One end of the two arm bodies is rotationally connected to the driving wheel through the first axis, and the other end is rotationally connected to the first connecting seat through the third axis. The third sleeve is provided with the preloaded worm gear, and the preloaded worm gear can rotate around the axis of the third axis relative to the support arm.

[0026] Furthermore, the driving assembly includes the driving wheel and the torque motor, and the first shaft fixedly connected to the stator of the torque motor.

[0027] The first shaft is rotationally connected to the driving wheel, two ends of the first shaft are fixedly connected to the support arm, and the interior of the central shaft hole of the driving wheel is fixedly connected to the rotor of the torque motor.

[0028] Furthermore, a preload motor is fixedly connected inside the first connecting seat, and a power output shaft of the preload motor passes through a preload mounting base at the end of the first connecting seat and is fixedly connected to the preload worm.

[0029] 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;

[0030] The bottom end of the outer sleeve is fixedly connected with an outer connecting ring, and the center position of the outer connecting ring is fixedly connected with the adapter column;

[0031] The top end of the outer sleeve and the top end of the middle sleeve are both fixedly connected with locking rings;

[0032] The bottom ends of the intermediate sleeve and the central sleeve are both fixedly connected to limiting rings;

[0033] Wherein, the locking ring is equipped with an interlocking pin, and the outer walls of the intermediate sleeve and the central sleeve are both provided with deployment locking holes for engaging with the interlocking pin to keep the sleeve assembly deployed;

[0034] Wherein, a folding locking hole is provided on the locking ring for accommodating the head end of the adjacent interlocking pin so as to keep the sleeve assembly folded.

[0035] Furthermore, the locking ring side wall 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 component is installed in the mounting hole for driving the interlocking pin to extend and engage with the unfolding locking hole.

[0036] Furthermore, 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 is in contact with the outer wall of the adjacent intermediate sleeve or the center sleeve.

[0037] In the above technical solution, the present invention provides a fixed variable diameter inner drive sleeve deployment device, which has the following beneficial effects:

[0038] The fixed variable diameter inner drive sleeve deployment device of the present invention is deployed, and has a simple structure. There will be no obvious technical obstacles in design, manufacturing, assembly and use due to the increase in the sleeve extension length. The device is embedded in the sleeve, with high integration and easy use. It has good scalability and no restrictions on the length of a single-stage sleeve, so there is no restriction on the total extension length of the sleeve. It does not require a guide mechanism, has high reliability, a small sleeve diameter difference, and a large unfolding ratio. It is simple to control and has high reliability. The present invention can be used in all occasions where the drive sleeve is deployed, especially in the field of space remote sensing where high deployment accuracy is required. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0040] Figure 1 It is a structural schematic diagram of a fixed variable-diameter inner drive sleeve deployment device installed in a sleeve assembly disclosed in the present invention;

[0041] Figure 2 yes Figure 1 A local enlarged view of the I position;

[0042] Figure 3 It is an axonometric view of a fixed variable diameter inner drive sleeve deployment device disclosed in the present invention;

[0043] Figure 4 It is a front view of a variable diameter pre-tightening drive assembly of a fixed variable diameter inner drive sleeve deployment device disclosed in the present invention;

[0044] Figure 5 yes Figure 4 AA section view;

[0045] Figure 6 It is a left view of a variable diameter pre-tightening drive assembly of a fixed variable diameter inner drive sleeve deployment device disclosed in the present invention;

[0046] Figure 7It is a structural schematic diagram of a fixed variable-diameter inner drive sleeve deployment device disclosed in the present invention, which is assembled in a sleeve assembly and the sleeve assembly is in a deployed state;

[0047] Figure 8 yes Figure 7 A local enlarged view of position II.

[0048] Description of reference numerals:

[0049] 1. Driving wheel; 2. Rotor; 3. Stator; 4. First axis; 5. Support arm; 501. Deformation beam; 502. Connecting ring; 503. Flexible hole; 504. Force measuring strain gauge; 6. Second axis; 7. Preload worm gear; 8. Third axis; 9. Preload mounting base; 10. Preload worm; 11. Preload motor; 12. First connecting seat; 13. Second connecting seat; 14. Outer connecting ring; 15. Intermediate limiting ring; 16. Outer sleeve; 17. Intermediate sleeve; 18. Adapter column; 19. Center sleeve; 20. Interlocking pin; 21. Compression spring; 22. Outer locking ring; 23. Center connecting ring; 25. Intermediate locking ring; 26. Center limiting ring; 27. Folding locking hole; 28. Unfolding locking hole;

[0050] 1000, sleeve assembly;

[0051] 2000. Expand the driver components:

[0052] 3000, variable diameter preload drive assembly. DETAILED DESCRIPTION

[0053] 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 described in detail below with reference to the accompanying drawings.

[0054] See also Figure 1 As shown;

[0055] A fixed variable diameter inner drive sleeve deployment device is invented, which is used to deploy sleeve assemblies 1000 which are sleeved in sequence and deployed along the axial direction;

[0056] The sleeve assembly 1000 is a multi-stage sleeve assembly, which includes an outer sleeve 16, a plurality of intermediate sleeves 17 and a central sleeve 19. The diameters of the plurality of intermediate sleeves 17 are sleeved with each other in a decreasing manner, wherein the outermost intermediate sleeve 17 is sleeved with the inner wall of the outer sleeve 16, and the central sleeve 19 is sleeved with the inner wall of the innermost intermediate sleeve 17;

[0057] See also Figure 3 As shown;

[0058] The fixed variable diameter inner drive sleeve deployment device comprises:

[0059] A variable diameter preload drive assembly 3000 disposed inside the sleeve assembly 1000;

[0060] A first connecting seat 12 that supports the variable diameter preload drive assembly 3000; and

[0061] The second connecting seat 13 has a sleeve portion and a claw portion fixedly connected to one side of the sleeve portion. The second connecting seat 13 extends into the variable diameter preload drive assembly 3000 through the claw portion to be fixedly connected to the first connecting seat 12;

[0062] The sleeve assembly 1000 has a transfer column 18 fixedly connected therein;

[0063] The top end of the adapter column 18 is fixedly connected to the sleeve portion of the second connection seat 13, so that the adapter column 18 is fixedly connected to the first connection seat 12 through the second connection seat 13, so as to support the variable diameter preload drive assembly 3000 away from the adapter column 18 and erected inside the sleeve assembly 1000;

[0064] Among them, both ends of the first connecting seat 12 are fixedly connected with the variable diameter pre-tightening drive assembly 3000, and one end of the first connecting seat 12 is fixedly connected with the second connecting seat 13. In this structure, according to the compactness of the structure, the variable diameter pre-tightening drive assembly 3000 can be fixedly connected only at the top of the first connecting seat 12. In this embodiment, only the variable diameter pre-tightening drive assembly 3000 is fixedly connected at both ends of the first connecting seat 12 as an example;

[0065] The variable diameter preload drive assembly 3000 is provided with a plurality of support arms 5 uniformly distributed along the circumferential direction of the axis of the sleeve assembly 1000. In this embodiment, three support arms 5 are taken as an example (three are optimal, and of course there can be more than three). The three support arms 5 are uniformly distributed in a circumferential distribution on the preload mounting base 9 fixedly connected to the end of the first connecting seat 12. Of course, there can also be two support arms 5, and the two support arms 5 can be symmetrically distributed on both sides of the preload mounting base 9, that is, symmetrically distributed on both sides of the central axis of the sleeve assembly 1000;

[0066] Among them, an unfolding drive assembly 2000 is installed at the end of the support arm 5. The unfolding drive assembly 2000 can roll against the inner wall of the sleeve assembly 1000 through the driving wheel 1. The unfolding drive assembly 2000 provides driving force for the driving wheel 1 through the torque motor, thereby unfolding the sleeve assembly 1000 step by step.

[0067] In this structure, in the working state, the variable diameter preload drive assembly 3000 uses the connection end of the multiple support arms 5 and the first connection seat 12 as the rotation point, and the ends of the multiple support arms 5 are synchronously expanded outward to adapt to the inner diameter of the sleeve assembly 1000, and the ends of the support arms 5 are in contact with the inner wall of the sleeve assembly 1000 through the driving wheel 1, and the torque motor of the unfolding drive assembly 2000 drives the driving wheel 1 to roll, thereby realizing the drive sleeve assembly 1000 to be unfolded step by step in sequence;

[0068] See also Figure 4-6 As shown;

[0069] Preferably, the end of the support arm 5 is rotatably connected to the driving wheel 1, the head end of the support arm 5 is rotatably connected to the first connecting seat 12, and the head end of the support arm 5 is also provided with a flexible structure for causing the support arm 5 to produce a flexible deformation corresponding to the preload torque. The flexible structure senses the size of the abutment force between the driving wheel 1 connected to the support arm 5 and the inner wall of the sleeve;

[0070] See also Figure 4 As shown;

[0071] Preferably, the variable diameter preload drive assembly 3000 further includes a preload worm 10, which is used to drive the plurality of support arms 5 to synchronously apply a force toward the inner wall of the sleeve of the sleeve assembly 1000;

[0072] A plurality of support arms 5 are evenly distributed circumferentially with the preload worm 10 as the center;

[0073] The head end of the support arm 5 is fixedly connected with a pre-tightening worm wheel 7 for meshing with the pre-tightening worm 10 to realize worm gear transmission. The support arm 5 provides driving force through the pre-tightening worm 10, so that the ends of multiple support arms 5 can expand outward synchronously;

[0074] A second shaft 6 is installed at the top of the preloaded worm wheel 7 . The second shaft 6 passes through the preloaded worm wheel 7 , and both ends of the second shaft 6 are connected to the flexible structure on the support arm 5 .

[0075] See also Figure 4 As shown;

[0076] Preferably, the flexible structure includes a deformable beam 501, a connecting ring 502 formed at one end of the deformable beam 501, and a flexible hole 503 opened on the support arm 5; specifically, the deformable beam 501 is a rectangular parallelepiped structure, the connecting ring 502 is a circular structure, the deformable beam 501 and the connecting ring 502 are formed inside the flexible hole 503, one end of the deformable beam 501 is fixedly connected to the connecting ring 502, the end of the deformable beam 501 away from the connecting ring 502 is fixedly connected to the inner wall of the flexible hole 503, and the connecting ring 502 is connected to the second shaft 6;

[0077] The shape of the flexible hole 503 is adapted to the shape of the deformable beam 501 and the connecting ring 502, and a gap is formed between the inner wall of the flexible hole 503 and the side walls of the deformable beam 501 and the connecting ring 502, and a force measuring strain gauge 504 is installed in the gap. The force measuring strain gauge 504 is installed in the gaps on both sides of the deformable beam 501 of the flexible hole 503. When the deformable beam 501 is deformed, the preload force of the support arm 5 can be calculated by measuring the strain of the force measuring strain gauge 504, and then the contact force between the driving wheel 1 connected to the support arm 5 and the inner wall of the sleeve can be calculated.

[0078] See also Figure 5 As shown;

[0079] Preferably, the support arm 5 includes two arms arranged parallel to each other; specifically, the two arms are arranged at an interval, and an installation space for installing the driving wheel 1 is formed between the two arms;

[0080] One end of the two arm bodies is rotationally connected to the driving wheel 1 through the first shaft 4, and the other end is rotationally connected to the first connecting seat 12 through the third shaft 8. The third shaft 8 is sleeved with a preloaded worm gear 7, which is located in the middle of the two arm bodies, and the preloaded worm gear 7 can rotate relative to the support arm 5 around the axis of the third shaft 8. In a specific embodiment, the preloaded worm gear 7 can be fixedly connected to the third shaft 8, and the third shaft 8 is rotationally connected to the arm body of the support arm 5, or the preloaded worm gear 7 can be rotationally connected to the third shaft 8, and the third shaft 8 is fixedly connected to the arm body of the support arm 5, and the preloaded worm gear 7 can realize rotation relative to the support arm 5 around the axis of the third shaft 8;

[0081] See also Figure 5 As shown;

[0082] Preferably, the driving assembly includes a driving wheel 1 and a torque motor, and a first shaft 4 fixedly connected to a stator 3 of the torque motor;

[0083] The first shaft 4 is rotatably connected to the driving wheel 1, the two ends of the first shaft 4 are fixedly connected to the support arm 5, and the center shaft hole of the driving wheel 1 is fixedly connected to the rotor 2 of the torque motor. The torque motor is started to realize the rotation of the driving wheel 1;

[0084] See also Figure 3 , 4 As shown;

[0085] Preferably, both ends of the first connecting seat 12 are fixedly connected to a pre-tightening mounting base 9 connected to the support arm 5. Inside the first connecting seat 12, the pre-tightening mounting base 9 is fixedly connected to a pre-tightening motor 11. The pre-tightening motor 11 has a reducer and a position sensor. The pre-tightening motor 11 is fixedly connected to the pre-tightening mounting base 9 through the reducer. The power output shaft of the pre-tightening motor 11 passes through the pre-tightening mounting base 9 and is fixedly connected to the pre-tightening worm 10, and the pre-tightening motor 11 provides a rotational driving force for the pre-tightening worm 10.

[0086] See also Figure 1 , 7 As shown;

[0087] Preferably, the sleeve assembly 1000 includes an outer sleeve 16, at least one middle sleeve 17 sleeved inside the outer sleeve 16, and a center sleeve 19 sleeved inside the middle sleeve 17;

[0088] In this embodiment, the intermediate sleeve 17 includes a plurality of intermediate sleeves 17, and the plurality of intermediate sleeves 17 have the same structure. The number of intermediate sleeves 17 can be increased or decreased according to design requirements (an embodiment of a plurality of intermediate sleeves 17 will be described in detail later);

[0089] The outer sleeve 16 includes an outer connecting ring 14, the inner surface of the outer cylinder of the outer connecting ring 14 is fixedly connected to the bottom end of the outer sleeve 16, and the outer surface of the central cylinder of the outer connecting ring 14 is fixedly connected to the adapter column 18;

[0090] The top of the outer sleeve 16 and the top of the middle sleeve 17 are both fixedly connected with locking rings, and the bottoms of the middle sleeve 17 and the center sleeve 19 are both fixedly connected with limiting rings. Specifically, the locking rings include an outer locking ring 22 and an middle locking ring 25, and the limiting rings include an middle limiting ring 15 and a center limiting ring 26. The middle limiting ring 15 and the center limiting ring 26 have the same structure and are both stepped.

[0091] The top of the outer sleeve 16 is fixedly connected with an outer locking ring 22, and the bottom of the middle sleeve 17 is fixedly connected with the inner surface of the outer cylinder of the middle limiting ring 15;

[0092] When the sleeve assembly 1000 is unfolded, the outer sleeve 16 contacts the intermediate limiting ring 15 at the bottom end of the intermediate sleeve 17 through the outer locking ring 22 and is mechanically limited to prevent the intermediate sleeve 17 from being separated from the outer sleeve 16. At the same time, the end of the interlocking pin 20 on the outer locking ring 22 is ensured to slide into the locking hole 28 of the intermediate sleeve 17 under the action of the compression spring 21, thereby completing the locking of the outer sleeve 16 and the intermediate sleeve 17 after unfolding;

[0093] The top of the intermediate sleeve 17 is fixedly connected with an intermediate locking ring 25, and the bottom end of the center sleeve 19 is fixedly connected with the inner surface of the outer cylinder of the center limiting ring 26;

[0094] When the sleeve assembly 1000 is unfolded, the intermediate sleeve 17 contacts the central limiting ring 26 at the bottom end of the center sleeve 19 through the intermediate locking ring 25 and is mechanically limited to prevent the center sleeve 19 from being separated from the intermediate sleeve 17. At the same time, the end of the interlocking pin 20 on the intermediate locking ring 25 slides into the unfolding locking hole 28 of the center sleeve 19 under the action of the compression spring 21, thereby completing the locking of the intermediate sleeve 17 and the center sleeve 19 after unfolding.

[0095] Among them, in this structure, the locking ring is equipped with an interlocking pin 20, the outer locking ring 22 and the middle locking ring 25 have the same structure and are both equipped with an interlocking pin 20, and the outer walls of the middle sleeve 17 and the center sleeve 19 are both provided with an unfolding locking hole 28 corresponding to the position of the interlocking pin 20, which is used to engage with the interlocking pin 20 to keep the sleeve assembly 1000 unfolded; the locking holes 28 can be multiple and distributed along the circumference of the middle sleeve 17 and the center sleeve 19, and the number and position of the interlocking pin 20 match the position of the locking hole 28;

[0096] The locking ring is located above the interlocking pin 20 and is provided with a folding locking hole 27 for accommodating the head end of the adjacent interlocking pin 20 to keep the sleeve assembly 1000 folded.

[0097] See also Figure 2 As shown;

[0098] Preferably, a mounting hole with a stepped structure for mounting the interlocking pin 20 is provided on the side wall of the limiting ring. The interlocking pin 20 is slidably connected to the mounting hole. The structure of the interlocking pin 20 is a stepped shaft. An elastic component is installed in the mounting hole to drive the interlocking pin 20 to extend and engage with the deployment locking hole 28. The elastic component is a compression spring 21 in the prior art. One end of the compression spring 21 is in contact with the shaft shoulder of the interlocking pin 20, and the other end is in contact with the stepped end surface formed by the mounting hole. The compression spring 21 extends to drive the end of the interlocking pin 20 to extend out of the mounting hole and be exposed on the inner wall side of the sleeve.

[0099] See also Figure 1 As shown;

[0100] Preferably, when the sleeve assembly 1000 is in the folded state, the head end of the interlocking pin 20 is exposed outside the locking ring, and the tail end of the interlocking pin 20 is in contact with the outer wall of the adjacent intermediate sleeve 17 or the central sleeve 19 .

[0101] Specifically, under the action of the compression spring 21, when the sleeve assembly 1000 is folded, the end of the interlocking pin 20 at the top of the middle sleeve 17 contacts the outer wall of the center sleeve 19, and the head end of the interlocking pin 20 is exposed outside the middle locking ring 25 and engages with the folding locking hole 27 on the adjacent middle locking ring 25 to lock the two adjacent middle sleeves 17, or the head end of the interlocking pin 20 is exposed outside the middle locking ring 25 and engages with the folding locking hole 27 on the adjacent outer locking ring 22 to lock the middle sleeve 17 and the outer sleeve 16;

[0102] Similarly, when the sleeve assembly 1000 is folded, the end of the interlocking pin 20 at the top of the outer sleeve 16 contacts the outer wall of the middle sleeve 17, and the head end of the interlocking pin 20 is exposed outside the outer locking ring 22. Of course, in order to avoid the head end of the interlocking pin 20 on the outer locking ring 22 being exposed outside the outer locking ring 22 and interfering with other equipment, the outer locking ring 22 can hide the head end of the interlocking pin 20 on the outer locking ring 22 inside by increasing the wall thickness or other structural forms;

[0103] Preferably, a center connecting ring 23 is fixedly connected to the top of the center sleeve 19, which seals the folding locking hole 27 of the innermost intermediate sleeve 17 and contacts the end of the interlocking pin 20 in the intermediate sleeve 17, thereby causing the innermost intermediate sleeve 17 to interlock with the adjacent intermediate sleeve 17.

[0104] See also Figure 1 As shown;

[0105] Multiple intermediate sleeves 17 embodiments:

[0106] Several intermediate sleeves 17 have the same structure and are connected to each other in order from small to large diameters, wherein 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 17, and the smaller i is, the smaller the diameter of the corresponding intermediate sleeve 17);

[0107] The intermediate sleeve 17 includes a stepped intermediate limit ring 15 and an intermediate locking ring 25. The inner cylindrical surface of the intermediate limit ring 15 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 25. The intermediate locking ring 25 has a plurality of stepped mounting holes evenly distributed around the circumference. The mounting holes are slidably connected with interlocking pins 20. A compression spring 21 is also installed in the mounting holes. The compression spring 21 is sleeved on the middle part of the interlocking pin 20, and one end abuts against the end face of the mounting hole, and the other end abuts against the end face of the shaft shoulder of the interlocking pin 20.

[0108] The middle locking ring 25 is located above the locking pin 20 and has folding locking holes 27, see Figure 7 , 8 As shown, a locking hole 28 is provided at the bottom end of the intermediate sleeve i corresponding to the locking pin 20 of the adjacent intermediate sleeve;

[0109] See also Figure 1 , 2 As shown;

[0110] Multiple intermediate sleeves 17 are interlocked in folded state;

[0111] The two adjacent intermediate sleeves j+1 and j (j represents the arrangement order of the intermediate sleeves, 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 end cylindrical surface of the interlocking pin 20 of the intermediate sleeve j cooperates with the folding locking hole 27 on the intermediate sleeve j+1, and its lower end surface abuts against the outer cylindrical surface of the intermediate sleeve j-1, thereby interlocking the adjacent intermediate sleeves 17.

[0112] When j is 1 and j+1 is 2, the inner surface of the intermediate sleeve 2 is slidingly connected to the outer surface of the intermediate sleeve 1, the upper end cylindrical surface of the interlocking pin 20 of the intermediate sleeve 1 cooperates with the folding locking hole 27 on the intermediate sleeve 2, and its lower end surface abuts against the outer cylindrical surface of the center sleeve 19, and does not restrict the axial movement of the center sleeve 19.

[0113] When j is n, the inner surface of the outer sleeve 16 is slidably connected to the outer surface of the middle sleeve n, the upper end cylindrical surface of the interlocking pin 20 of the middle sleeve n cooperates with the folding locking hole 27 on the outer sleeve 16, and its lower end surface abuts against the outer cylindrical surface of the middle sleeve n-1, thereby interlocking the two sleeves.

[0114] See also Figure 7 , 8 As shown;

[0115] After the two adjacent stages of sleeves are unfolded to the mechanical limit, the lower cylindrical surface of the interlocking pin 20 slides into the corresponding unfolding locking hole 28 under the action of the compression spring 21, completing the locking of the sleeve assembly after unfolding.

[0116] In the above technical solution, the present invention provides a fixed variable diameter inner drive sleeve deployment device, the working principle of which is:

[0117] See also Figure 1 As shown;

[0118] In the initial state, the outer sleeve 16 and the middle sleeve 17 are connected as a whole (referred to as the whole 1) under the action of the interlocking pin 20.

[0119] The external control system starts the upper and lower preload motor assemblies 11, so that the driving wheel 1 contacts the inner wall of the center sleeve 19. The contact force can be calculated by the force measuring strain gauge 504 installed on the support arm 5. When the contact force meets the requirement, the driving assembly moves and the driving wheel 1 rotates. At this time, the contact friction force between the driving wheel 1 and the inner wall of the sleeve is converted into the deployment driving force of the driving unit 1. As the unfolding movement continues, the mechanical limit contact between the center sleeve 19 and the intermediate sleeve 1 (the number behind this part of the intermediate sleeve represents i, which is the order of the intermediate sleeves from the inside to the outside), the interlocking pin 20 in the intermediate sleeve 1 slides into the unfolding locking hole 28 on the sleeve in the center sleeve 19, completing the axial locking of the center sleeve 19 and the intermediate sleeve 1, and at the same time releasing the axial locking of the intermediate sleeve 1 and the intermediate sleeve 2, so that the whole 1 is transformed into the whole 2, and the variable diameter preload drive assembly drives the whole 2 to continue the axial unfolding movement. As the unfolding movement continues, the drive wheel 1 at the bottom of the device will gradually break away from the inner surface of the center sleeve 19. At this time, the force measuring strain gauge 503 on the lower preload drive arm 5 will have a signal change. At this time, the lower preload motor 11 moves to open the drive wheel 1 outward, so that it contacts the inner surface of the intermediate sleeve 1 and continues the axial unfolding movement. When the same situation occurs in the drive wheel 1 at the top of the device, the same adjustment is performed to continue the axial unfolding movement. The above action mode is repeated until the sleeve assembly is fully unfolded.

[0120] Beneficial effects:

[0121] The fixed variable diameter inner drive sleeve deployment device of the present invention is deployed, and has a simple structure. There will be no obvious technical obstacles in design, manufacturing, assembly and use due to the increase in the sleeve extension length. The device is embedded in the sleeve, with high integration and easy use. It has good scalability and no restrictions on the length of a single-stage sleeve, so there is no restriction on the total extension length of the sleeve. It does not require a guide mechanism, has high reliability, a small sleeve diameter difference, and a large unfolding ratio. It is simple to control and has high reliability. The present invention can be used in all occasions where the drive sleeve is deployed, especially in the field of space remote sensing where high deployment accuracy is required.

[0122] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various 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 variable diameter inner drive sleeve deployment device, used for deploying sleeve assemblies (1000) which are sequentially sleeved and deployed along the axial direction, characterized in that: include: a variable diameter preload drive assembly (3000) disposed inside the sleeve assembly (1000); and A first connecting seat (12) carrying the variable diameter preload drive assembly (3000); The sleeve assembly (1000) is fixedly connected with a transfer column (18); The top end of the adapter column (18) is fixedly connected to the first connection seat (12) via a second connection seat (13) so as to support the variable diameter preload drive assembly (3000) away from the adapter column (18) and mounted inside the sleeve assembly (1000); Wherein, at least one end of the first connecting seat (12) is fixedly connected to the variable diameter pre-tightening drive assembly (3000); The variable diameter preload drive assembly (3000) is provided with a plurality of support arms (5) uniformly distributed along the circumference of the axis of the sleeve assembly (1000); The unfolding drive assembly (2000) installed at the end of the support arm 5 can rollably contact the inner wall of the sleeve of the sleeve assembly (1000) through the driving wheel (1), thereby driving the sleeve assembly (1000) to unfold.

2. A fixed variable diameter inner drive sleeve deployment device according to claim 1, characterized in that ； The end of the support arm (5) is rotatably connected to the driving wheel (1), the head end of the support arm (5) is rotatably connected to the first connecting seat (12), and the head end of the support arm (5) is also provided with a flexible structure for causing the support arm (5) to generate a flexible deformation corresponding to the preload torque it is subjected to.

3. A fixed variable diameter inner drive sleeve deployment device according to claim 2, It is characterized by: The variable diameter preload drive assembly (3000) further comprises a preload worm (10) for driving the plurality of support arms (5) to synchronously apply a force toward the inner wall of the sleeve of the sleeve assembly (1000); The plurality of support arms (5) are evenly distributed circumferentially with the preloaded worm (10) as the center; The front end of the support arm (5) is fixedly connected with a pre-tightening worm wheel (7) for meshing with the pre-tightening worm (10); The preloaded worm wheel (7) is provided with a second shaft (6), and both ends of the second shaft (6) are connected to the flexible structure.

4. A fixed variable diameter inner drive sleeve deployment device according to claim 3, characterized in that ； The flexible structure comprises a deformable beam (501), a connecting ring (502) formed at one end of the deformable beam (501), and a flexible hole (503) provided on the support arm (5); The end of the deformable beam (501) away from the connecting ring (502) is fixedly connected to the inner wall of the flexible hole (503); The connecting ring (502) is connected to the second shaft (6); The shape of the flexible hole (503) is adapted to the shapes of the deformable beam (501) and the connecting ring (502), and a gap is formed between the inner wall of the flexible hole (503) and the side walls of the deformable beam (501) and the connecting ring (502), and a force measuring strain gauge (504) is installed in the gap.

5. A fixed variable diameter inner drive sleeve deployment device according to claim 3, characterized in that ； The support arm (5) comprises two arm bodies arranged parallel to each other; One end of the two arm bodies is rotationally connected to the driving wheel (1) via a first shaft (4), and the other end is rotationally connected to the first connecting seat (12) via a third shaft (8). The third shaft (8) is sleeved with the preloaded worm gear (7), and the preloaded worm gear (7) can rotate relative to the support arm (5) around the axis of the third shaft (8).

6. A fixed variable diameter inner drive sleeve deployment device according to claim 5, It is characterized by: The driving assembly comprises the driving wheel (1) and the torque motor, and the first shaft (4) fixedly connected to the stator (3) of the torque motor; The first shaft (4) is rotationally connected to the driving wheel (1), the two ends of the first shaft (4) are fixedly connected to the support arm (5), and the interior of the central shaft hole of the driving wheel (1) is fixedly connected to the rotor (2) of the torque motor.

7. A fixed variable diameter inner drive sleeve deployment device according to claim 3, characterized in that ； A preload motor (11) is fixedly connected to the interior of the first connecting seat (12), and a power output shaft of the preload motor (11) passes through a preload mounting base (9) at the end of the first connecting seat (12) and is fixedly connected to the preload worm (10).

8. A fixed variable diameter inner drive sleeve deployment device according to claim 1, characterized in that ； The sleeve assembly (1000) comprises an outer sleeve (16), at least one intermediate sleeve (17) sleeved inside the outer sleeve (16), and a central sleeve (19) sleeved inside the intermediate sleeve (17); The bottom end of the outer sleeve (16) is fixedly connected with an outer connecting ring (14), and the center position of the outer connecting ring (14) is fixedly connected with the adapter column (18); The top end of the outer sleeve (16) and the top end of the middle sleeve (17) are both fixedly connected with locking rings; The bottom ends of the intermediate sleeve (17) and the central sleeve (19) are both fixedly connected to limit rings; The locking ring is provided with an interlocking pin (20), and the outer walls of the intermediate sleeve (17) and the central sleeve (19) are provided with deployment locking holes (28) for engaging with the interlocking pin (20) to keep the sleeve assembly (1000) deployed; Wherein, a folding locking hole (27) is provided on the locking ring for accommodating the head end of the adjacent interlocking pin (20) so as to keep the sleeve assembly (1000) folded.

9. A fixed variable diameter inner drive sleeve deployment device according to claim 8, characterized in that ； The locking ring side wall is provided with a mounting hole in a stepped structure for mounting the interlocking pin (20); the interlocking pin (20) is a stepped shaft; an elastic component is installed in the mounting hole for driving the interlocking pin (20) to extend and engage with the unfolding locking hole (28).

10. A fixed variable diameter inner drive sleeve deployment device according to claim 8, characterized in that ； When the sleeve assembly (1000) is in a folded state, the head end of the interlocking pin (20) is exposed outside the locking ring, and the tail end of the interlocking pin (20) is in contact with the outer wall of the adjacent intermediate sleeve (17) or the central sleeve (19).

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