A follow-up variable diameter inner drive sleeve deployment device

Abstract

The present invention discloses a follow-up variable diameter internal drive sleeve deployment device, comprising a first connecting seat and a second connecting seat; at least one set of variable diameter pre-tightening drive mechanisms fixedly connected to the end of the first connecting seat, and one end of the second connecting seat having a claw-type structure is fixedly connected to the variable diameter pre-tightening drive mechanism on one side of the first connecting seat, and the other end of the second connecting seat is installed with a sleeve assembly; the variable diameter pre-tightening drive mechanism abuts against the inner wall of the fixed-stage sleeve of the sleeve assembly. The follow-up variable diameter internal drive deployment device of the present invention has a simple structure and will not cause obvious technical obstacles in design, manufacturing, assembly and use due to the increase in the sleeve extension length; and the drive mechanism is embedded in the sleeve, with high integration, easy use, good scalability, and no limit on the length of the single-stage sleeve. Therefore, there is no limit on the total extension length of the sleeve; no guide mechanism is required, the reliability is high, the sleeve diameter difference is small, and the expansion and folding ratio is large.

Description

Technical Field

[0001] The present invention relates to the technical field of variable structure space remote sensors, and in particular to a follower variable diameter inner drive sleeve deployment device for driving the on-orbit deployment of a multi-stage sleeve to achieve on-orbit reorganization of an ultra-large variable structure space remote sensor. Background Art

[0002] To overcome launch capacity limitations and build larger-aperture space sensors in orbit, deployable space sensors have become a new development direction. The basic principle of this technology is to systematically fold the system to reduce its footprint before launch. Once in orbit, it automatically unfolds and reassembles, achieving imaging capabilities equivalent to the designed aperture. Deployable space sensors require a deployment mechanism to achieve their desired shape. Traditional deployment mechanisms include articulated trusses, thin-walled tubes, sleeves, coils, and inflatables.

[0003] The telescopic type has good stiffness and strength performance due to the large moment of inertia of the cylinder section and the certain length of overlap retained between each two-stage 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] Depending on the method of sleeve deployment, it can be categorized as rope-driven, screw-driven, and thin-walled open-tube-driven. Rope-driven systems offer advantages such as good deployment synchronization, simple structure and principle, and lightweight drive components. However, in microgravity, the ropes present the risk of entanglement, resulting in low reliability. The elasticity of the ropes can cause oscillations during the deployment process, making system control difficult. Screw-driven systems offer significant advantages such as a simple principle, stable structure, high strength, and high deployment driving force. However, they require very high screw machining precision and nut assembly accuracy. Limited by screw manufacturing capacity, the sleeve cannot achieve a very long single-stage extension length, resulting in a relatively low deployment-folding ratio. Screw-driven systems are prone to bending and deformation, leading to mechanism jamming and low reliability. Thin-walled open-tube-driven systems offer a high axial driving force. However, their deployment and retraction mechanisms are complex, heavy, and inconvenient. Asymmetrical deformation of the thin-walled open-tube after deployment can cause axial rotation of the sleeve, squeezing the guide mechanism and causing deformation of the deployment mechanism. Furthermore, manufacturing thin-walled open-tube systems with long travels is difficult and costly.

[0005] Based on the above technical problems, technicians in this field urgently need to develop a follow-up variable-diameter inner-driven sleeve deployment device to drive the on-orbit deployment of multi-stage sleeves and realize the on-orbit reorganization of ultra-large variable-structure space remote sensors. Summary of the Invention

[0006] The purpose of the present invention is to provide a follow-up variable-diameter inner-driven sleeve deployment device for driving the on-orbit deployment of a multi-stage sleeve to achieve the on-orbit reorganization of a super-large variable-structure space remote sensor.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] The present invention provides a follow-up variable diameter inner drive sleeve deployment device, which comprises:

[0009] a first connecting seat and a second connecting seat;

[0010] At least one set of variable diameter pre-tightening drive mechanism fixedly connected to the end of the first connecting seat, and one end of the second connecting seat having a claw structure is fixedly connected to the variable diameter pre-tightening drive mechanism on one side of the first connecting seat, and the other end of the second connecting seat is installed with a sleeve assembly;

[0011] The variable diameter pre-tightening driving mechanism abuts against the inner wall of the fixed stage sleeve of the sleeve assembly.

[0012] Furthermore, the variable diameter preload drive mechanism has two or more preload drive arm assemblies that are axially symmetrically distributed;

[0013] The preload drive arm assembly comprises:

[0014] A first small shaft, wherein the first small shaft is configured as a stepped structure, and a large bevel gear is fixedly connected to the left side of the first small shaft;

[0015] driving wheels fixedly connected to both ends of the first small shaft; and

[0016] a first supporting arm and a second supporting arm rotatably connected to two ends of the first small shaft respectively;

[0017] The pre-tightening drive arm assembly further includes a drive motor assembly, the drive motor assembly is fixedly connected to the second support arm, and a small bevel gear is fixedly connected to the output end of the drive motor assembly;

[0018] A third small shaft is sleeved on one end of the first support arm and the second support arm away from the driving wheel, a pre-tightening large spur gear is sleeved on the middle part of the third small shaft, and a second small shaft is installed in the shaft hole on the upper part of the pre-tightening large spur gear;

[0019] The two ends of the second small shaft are respectively connected to the flexible holes of the first support arm and the second support arm;

[0020] The large bevel gear and the small bevel gear are meshed for transmission;

[0021] The variable diameter preload drive mechanism further includes:

[0022] A special-shaped pre-tightening mounting base, wherein a pre-tightening rack is slidably connected to a central light hole of the special-shaped pre-tightening mounting base, and a pre-tightening motor assembly is installed at the lower part of the special-shaped pre-tightening mounting base;

[0023] The output end of the pre-tightening motor assembly is fixedly connected to a pre-tightening small spur gear, and the pre-tightening small spur gear is engaged with the pre-tightening rack to drive the pre-tightening rack to move;

[0024] The pre-tightening drive arm assembly is rotatably connected to the upper portion of the special-shaped pre-tightening mounting base via the third small shaft, and the pre-tightening rack is meshed and driven with the pre-tightening drive arm assembly via the pre-tightening large spur gear.

[0025] Furthermore, the sleeve assembly includes:

[0026] an outer sleeve assembly, an intermediate sleeve assembly, and a center sleeve assembly;

[0027] The outer sleeve assembly comprises:

[0028] outer sleeve;

[0029] an outer connecting ring fixedly connected to one end of the outer sleeve; and

[0030] an outer limiting ring fixedly connected to the other end of the outer sleeve;

[0031] The outer sleeve is provided with axially symmetrically distributed deployment locking holes, and the intermediate sleeve and the outer sleeve are locked and maintained in relative position after being deployed into place through the deployment locking holes;

[0032] The driving wheel of the pre-tightening driving arm assembly abuts against the inner wall of the outer sleeve.

[0033] Furthermore, the central sleeve assembly includes:

[0034] center sleeve;

[0035] a central connecting ring fixedly connected to an end portion of one end of the central sleeve;

[0036] a central locking ring fixedly connected to the other end of the central sleeve, wherein the central locking ring is fixedly connected to the second connecting seat;

[0037] The outer side surface of the central locking ring is provided with axially symmetrically distributed folding locking holes, and the central sleeve is locked with the intermediate sleeve assembly through an interlocking structure.

[0038] Furthermore, the intermediate sleeve assembly includes a plurality of intermediate sleeves with the same structure and gradually increasing diameters from the inside to the outside;

[0039] One end of the intermediate sleeve is provided with an intermediate limiting ring;

[0040] The other end of the intermediate sleeve is fixedly connected with an intermediate locking ring;

[0041] The outer side surface of the intermediate locking ring has axially symmetrically distributed folding locking holes, and the intermediate sleeve has axially symmetrically distributed unfolding locking holes;

[0042] The adjacent intermediate sleeves and the intermediate sleeves and the central sleeve are locked at the corresponding folding locking holes through an interlocking structure;

[0043] When the sleeve assembly is deployed, the adjacent intermediate sleeves, the intermediate sleeves and the central sleeve, and the intermediate sleeves and the outer sleeve are locked at the corresponding deployment locking holes through the interlocking structure.

[0044] Furthermore, the central locking ring and the intermediate locking ring are both provided with axially symmetrically distributed stepped holes, and the interlocking structure is integrated into the corresponding stepped holes;

[0045] The interlocking structure includes:

[0046] interlocking pins slidably coupled to corresponding stepped holes; and

[0047] A compression spring is sleeved on the interlocking pin, wherein one end of the compression spring abuts against the end surface of the corresponding stepped hole, and the other end abuts against the stepped surface of the interlocking pin.

[0048] Furthermore, when the adjacent two-stage sleeve assemblies are in the folded state, except for the outermost stage sleeve assembly, the remaining sleeve assemblies are configured as follows: the interlocking pin of the outer stage sleeve assembly extends into the folding locking hole of the inner stage sleeve assembly to achieve locking.

[0049] When the two adjacent sleeve assemblies are unfolded to the mechanical limit, the interlocking pin of the inner sleeve assembly is driven by the compression spring to be embedded in the unfolding locking hole of the outer sleeve assembly to achieve locking after unfolding.

[0050] Furthermore, the variable diameter preload drive mechanism further includes:

[0051] a grating ruler fixed to one side of the preloaded rack; and

[0052] A reading head is fixed to the lower part of the special-shaped pre-tightening mounting base and cooperates with the grating ruler.

[0053] Furthermore, the flexible hole includes:

[0054] Deformed beams of long strip structures; and

[0055] A circular connecting hole is located at the top of the deformable beam.

[0056] Furthermore, strain gauges are attached to both sides of the deformation beam.

[0057] In the above technical solution, the present invention provides a follow-up variable diameter inner drive sleeve deployment device, which has the following beneficial effects:

[0058] The follow-up variable-diameter internal drive expansion device of the present invention has a simple structure and will not cause obvious technical obstacles in design, manufacturing, assembly and use due to the increase in the extension length of the sleeve; and the driving mechanism is embedded in the sleeve, with high integration, easy use, good scalability, and no limit on the length of the single-stage sleeve. Therefore, there is no limit on the total extension length of the sleeve; no guiding mechanism is required, the reliability is high, the sleeve diameter difference is small, and the expansion and folding ratio is large.

[0059] The follow-up variable-diameter internal drive deployment device of the present invention can be used in all occasions where a drive sleeve is deployed, especially in the field of space remote sensing where high deployment accuracy is required. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0061] Figure 1 A schematic structural diagram of a variable diameter pre-tightening drive mechanism of a follow-up variable diameter inner drive sleeve deployment device provided by an embodiment of the present invention;

[0062] Figure 2 A front view of a variable diameter pre-tightening drive mechanism of a follow-up variable diameter inner drive sleeve deployment device provided by an embodiment of the present invention;

[0063] Figure 3 A left side view of a variable diameter pre-tightening drive mechanism of a follow-up variable diameter inner drive sleeve deployment device provided by an embodiment of the present invention;

[0064] Figure 4 for Figure 2 Middle AA section view;

[0065] Figure 5 A schematic structural diagram of a follower-type variable-diameter inner drive sleeve deployment device in a folded state provided by an embodiment of the present invention;

[0066] Figure 6 for Figure 5 Middle partial enlarged view;

[0067] Figure 7 A schematic structural diagram of a fully deployed follow-up variable-diameter inner drive sleeve deployment device provided by an embodiment of the present invention;

[0068] Figure 8 for Figure 7 A partial enlarged view.

[0069] Description of reference numerals:

[0070] A. Variable diameter preload drive mechanism; B. Preload drive arm assembly; C. Sleeve assembly;

[0071] 1. Driving wheel; 2. First small shaft; 3. Large bevel gear; 4. Small bevel gear; 5. Driving motor assembly; 6. First support arm; 7. Second support arm; 8. Preload large spur gear; 9. Second small shaft; 10. Third small shaft; 11. Special-shaped preload mounting base; 12. Preload rack; 13. Preload small spur gear; 14. Preload motor assembly; 15. First connecting seat; 16. Second connecting seat; 17. Grating scale; 18. Reading head; 19. Outer connecting ring; 20. Outer sleeve; 21. Outer limit ring; 22. Intermediate locking ring; 23. Intermediate sleeve; 24. Intermediate limit ring; 25. Intermediate locking ring; 26. Center sleeve; 27. Center connecting ring; 28. Interlocking pin; 29. ​​Compression spring

[0072] 103. Connecting hole; 104. Deformable beam; 105. Folding locking hole; 106. Unfolding locking hole. DETAILED DESCRIPTION

[0073] 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.

[0074] See also Figures 1 to 8 As shown;

[0075] A follow-up variable diameter inner drive sleeve deployment device of this embodiment includes:

[0076] A first connecting seat 15 and a second connecting seat 16;

[0077] At least one set of variable diameter pre-tightening drive mechanism A fixedly connected to the end of the first connecting seat 15, and one end of the second connecting seat 16 with a claw structure is fixedly connected to the variable diameter pre-tightening drive mechanism A on one side of the first connecting seat 15, and the other end of the second connecting seat 16 is installed with a sleeve assembly C;

[0078] The variable diameter preload drive mechanism A abuts against the inner wall of the fixed stage sleeve of the sleeve assembly C.

[0079] Specifically, this embodiment discloses a follow-up variable diameter internal drive sleeve deployment device, which includes a first connecting seat 15, a second connecting seat 16, a variable diameter pre-tightening drive mechanism A and a sleeve assembly C; the variable diameter pre-tightening drive mechanism A is fixedly connected to the left and right ends of the first connecting seat 15, and the second connecting seat 16 has a claw-type structure, one end of which is fixedly connected to the variable diameter pre-tightening drive mechanism A on the corresponding side, and the sleeve assembly C is installed on the other side.

[0080] Preferably, the variable diameter preload drive mechanism A of this embodiment has two or more preload drive arm assemblies B that are axially symmetrically distributed;

[0081] The preload drive arm assembly B includes:

[0082] The first small shaft 2 is configured as a stepped structure, and a large bevel gear 3 is fixedly connected to the left side of the first small shaft 2;

[0083] A driving wheel 1 fixedly connected to both ends of the first small shaft 2; and

[0084] A first support arm 6 and a second support arm 7 are rotatably connected to both ends of the first small shaft 2;

[0085] The pre-tightening drive arm assembly B further includes a drive motor assembly 5, which is fixedly connected to the second support arm 7, and a small bevel gear 4 is fixedly connected to the output end of the drive motor assembly 5;

[0086] A third small shaft 10 is sleeved on one end of the first support arm 6 and the second support arm 7 away from the driving wheel 1. A pre-tightening large spur gear 8 is sleeved on the middle part of the third small shaft 10, and a second small shaft 9 is installed in the shaft hole on the upper part of the pre-tightening large spur gear 8;

[0087] The two ends of the second small shaft 9 are respectively connected to the flexible holes of the first support arm 6 and the second support arm 7;

[0088] The large bevel gear 3 and the small bevel gear 4 are meshed for transmission;

[0089] The variable diameter preload drive mechanism A also includes:

[0090] A special-shaped pre-tightening mounting base 11, a central light hole of the special-shaped pre-tightening mounting base 11 is slidably connected to a pre-tightening rack 12, and a pre-tightening motor assembly 14 is installed at the lower part of the special-shaped pre-tightening mounting base 11;

[0091] The output end of the preload motor assembly 14 is fixedly connected with a preload pinion 13 , which is engaged with the preload rack 12 to drive the preload rack 12 to move;

[0092] The preload drive arm assembly B is rotatably connected to the upper portion of the special-shaped preload mounting base 11 via the third small shaft 10 , and the preload rack 12 is meshed with the preload drive arm assembly B via the preload large spur gear 8 for transmission.

[0093] In addition, the sleeve assembly C of this embodiment includes:

[0094] an outer sleeve assembly, an intermediate sleeve assembly, and a center sleeve assembly;

[0095] First, the structure of the outer sleeve assembly is defined. The outer sleeve assembly of this embodiment includes:

[0096] Outer sleeve 20;

[0097] An outer connecting ring 19 fixedly connected to one end of the outer sleeve 20; and

[0098] An outer limiting ring 21 fixedly connected to the other end of the outer sleeve 20;

[0099] The outer sleeve 20 is provided with axially symmetrically distributed deployment locking holes 106, and the deployment locking holes 106 lock and maintain the relative position of the intermediate sleeve 23 and the outer sleeve 20 after they are deployed into place;

[0100] The driving wheel 1 of the preload driving arm assembly B abuts against the inner wall of the outer sleeve 20 .

[0101] Secondly, this embodiment defines the structure of the central sleeve assembly, which includes:

[0102] Center sleeve 26;

[0103] A central connecting ring 27 fixedly connected to the end of one end of the central sleeve 26;

[0104] A central locking ring 25 is fixedly connected to the other end of the central sleeve 26, and the central locking ring 25 is fixedly connected to the second connecting seat 16;

[0105] The outer side surface of the central locking ring 25 is provided with axially symmetrically distributed folding locking holes 105, and the central sleeve 26 is locked with the intermediate sleeve assembly through an interlocking structure.

[0106] Finally, the structure of the intermediate sleeve assembly is defined. The intermediate sleeve assembly of this embodiment includes multiple intermediate sleeves 23 with the same structure and gradually increasing diameter from the inside to the outside.

[0107] One end of the intermediate sleeve 23 is provided with an intermediate limiting ring 24;

[0108] The other end of the intermediate sleeve 23 is fixedly connected with an intermediate locking ring 22;

[0109] The outer side of the intermediate locking ring 22 has axially symmetrically distributed folding locking holes 105, and the intermediate sleeve 23 has axially symmetrically distributed unfolding locking holes 106;

[0110] Adjacent intermediate sleeves 23 and the intermediate sleeves 23 and the central sleeve 26 are locked at the corresponding folding locking holes 105 through an interlocking structure;

[0111] When the sleeve assembly C is deployed, adjacent intermediate sleeves 23 , the intermediate sleeves 23 and the center sleeve 26 , and the intermediate sleeves 23 and the outer sleeve 20 are locked at the corresponding deployment locking holes 106 through the interlocking structure.

[0112] This embodiment discloses that the outer sleeve assembly, the central sleeve assembly and the middle sleeve assembly of the sleeve assembly C require an interlocking structure to limit and lock the adjacent sleeve assemblies whether in the unfolded state or the folded state.

[0113] Specifically, the central locking ring 25 and the intermediate locking ring 22 are both provided with axially symmetrically distributed stepped holes, and the interlocking structure is integrated in the corresponding stepped holes;

[0114] The interlocking structure includes:

[0115] Interlocking pins 28 slidably connected to corresponding stepped holes; and

[0116] The compression spring 29 is sleeved on the interlocking pin 28 , and one end of the compression spring 29 abuts against the end surface of the corresponding stepped hole, and the other end abuts against the stepped surface of the interlocking pin 28 .

[0117] When two adjacent sleeve assemblies are in the folded state, except for the outermost sleeve assembly, the remaining sleeve assemblies are configured as follows: the interlocking pin 28 of the outer sleeve assembly extends into the folding locking hole 105 of the inner sleeve assembly to achieve locking, and the other end surface of the interlocking pin 28 abuts against the inner cylindrical surface of the outer sleeve assembly to maintain the locked state;

[0118] When the two adjacent sleeve assemblies are deployed to the mechanical limit, the interlocking pin 28 of the inner sleeve assembly is driven by the compression spring 29 to be embedded in the deployment locking hole 106 of the outer sleeve assembly to achieve locking after deployment.

[0119] As an extended implementation:

[0120] Assuming that there are n intermediate sleeves in the intermediate sleeve assembly, take the intermediate sleeve j+1 and intermediate sleeve j (where j is not equal to n and 1) of two adjacent sets as an example:

[0121] When in the folded state, the inner surface of the intermediate sleeve j is slidably connected to the outer surface of the intermediate sleeve j-1, the lower end cylindrical surface of the interlocking pin 28 of the intermediate sleeve j cooperates with the folding locking hole 105 on the intermediate sleeve j-1, and its upper end surface abuts against the inner cylindrical surface of the intermediate sleeve j+1, thereby interlocking the adjacent intermediate sleeves 23.

[0122] When j is 1, it is the first-stage intermediate sleeve. The inner surface of the second-stage intermediate sleeve is slidably connected to the outer surface of the first-stage intermediate sleeve. The lower end cylindrical surface of the interlocking pin 28 of the first-stage intermediate sleeve cooperates with the folding locking hole 105 on the center sleeve assembly, and the upper end surface abuts against the inner cylindrical surface of the second-stage intermediate sleeve, thereby interlocking the two groups.

[0123] When j is n, it is the last intermediate sleeve, the inner surface of the outer sleeve assembly is slidingly connected to the outer surface of the last intermediate sleeve, and the upper end surface of the interlocking pin 28 of the last intermediate sleeve abuts against the inner surface of the outer sleeve assembly, and no interlocking is performed between the two groups.

[0124] Preferably, the variable diameter preload drive mechanism A of this embodiment further includes:

[0125] A grating scale 17 fixed to one side of the preload rack 12; and

[0126] A reading head 18 is fixed to the lower part of the special-shaped pre-tightening mounting base 11 and cooperates with the grating ruler 17.

[0127] The flexible hole of this embodiment includes:

[0128] A deformable beam 104 of a long strip structure; and

[0129] A circular connecting hole 103 is located at the top of the deformable beam 104 .

[0130] Strain gauges 30 are attached to both sides of the deformation beam 104 .

[0131] The working principle of the follow-up variable diameter inner drive deployment device disclosed in this embodiment is:

[0132] Initially, the center sleeve assembly and the intermediate sleeve assembly are connected as a single unit (referred to as unit n) by interlocking pins 28. The upper and lower preload motor assemblies 14 are driven to bring the drive wheel 1 into contact with the inner wall of the outer sleeve assembly. The contact force of the drive wheel 1 is calculated using the force-measuring strain gauge 30 mounted on the support arm and the grating scale 17 on the preload drive assembly. When the contact force meets the required level, the drive assembly moves, causing the drive wheel 1 to rotate. The friction between the drive wheel 1 and the inner wall of the sleeve is converted into the driving force for the deployment of unit n. As the expansion movement continues, the outer sleeve assembly contacts the mechanical limit of the last-stage intermediate sleeve, and the interlocking pin 28 in the last-stage intermediate sleeve slides into the expansion locking hole 106 on the sleeve in the outer sleeve assembly, completing the axial locking of the outer sleeve assembly and the last-stage intermediate sleeve. At the same time, the axial locking of the last-stage intermediate sleeve and the intermediate sleeve of the inner level is released. In this way, the whole n is converted into the whole n-1, and the variable diameter pre-tightening drive mechanism A drives the whole n-1 to continue the axial expansion movement. As the expansion movement continues, the upper drive wheel 1 will touch the lower end face of the last-stage intermediate sleeve. At this time, on the upper variable diameter pre-tightening drive mechanism A The strain gauge 30 will have a sudden signal change. At this time, the upper preload motor assembly B moves, bringing the drive wheel 1 toward the center, using only the lower drive wheel 1 for axial expansion. The axial expansion continues for one wheelbase. The upper preload motor assembly 14 moves, causing the upper drive wheel 1 to contact the inner surface of the last intermediate sleeve. When the lower drive wheel 1 also contacts the lower end surface of the last intermediate sleeve, the lower preload motor assembly 14 moves, bringing the drive wheel 1 toward the center, continuing the expansion for one wheelbase. The lower preload motor assembly 14 moves, causing the lower drive wheel 1 to contact the inner surface of the last intermediate sleeve, completing the inter-stage diameter transition, and then continuing the expansion. Repeat this expansion action until the sleeve assembly C is fully expanded.

[0133] In the above technical solution, the present invention provides a follow-up variable diameter inner drive sleeve deployment device, which has the following beneficial effects:

[0134] The follow-up variable-diameter internal drive expansion device of the present invention has a simple structure and will not cause obvious technical obstacles in design, manufacturing, assembly and use due to the increase in the extension length of the sleeve; and the driving mechanism is embedded in the sleeve, with high integration, easy use, good scalability, and no limit on the length of the single-stage sleeve. Therefore, there is no limit on the total extension length of the sleeve; no guiding mechanism is required, the reliability is high, the sleeve diameter difference is small, and the expansion and folding ratio is large.

[0135] The follow-up variable-diameter internal drive deployment device of the present invention can be used in all occasions where a drive sleeve is deployed, especially in the field of space remote sensing where high deployment accuracy is required.

[0136] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. A follow-up variable diameter inner drive sleeve deployment device, characterized in that: The deployment device comprises: A first connecting seat (15) and a second connecting seat (16); At least one set of variable diameter pre-tightening drive mechanism (A) fixedly connected to the end of the first connecting seat (15), and one end of the second connecting seat (16) having a claw-shaped structure is fixedly connected to the variable diameter pre-tightening drive mechanism (A) on one side of the first connecting seat (15), and the other end of the second connecting seat (16) is installed with a sleeve assembly (C); The variable diameter preload drive mechanism (A) abuts against the inner wall of the fixed stage sleeve of the sleeve assembly (C); The variable diameter preload drive mechanism (A) has two or more preload drive arm assemblies (B) that are axially symmetrically distributed; The preload drive arm assembly (B) comprises: A first small shaft (2), the first small shaft (2) being configured as a stepped structure, and a large bevel gear (3) being fixedly connected to the left side of the first small shaft (2); a driving wheel (1) fixedly connected to both ends of the first small shaft (2); and a first supporting arm (6) and a second supporting arm (7) respectively rotatably connected to both ends of the first small shaft (2); The pre-tightening drive arm assembly (B) further comprises a drive motor assembly (5), wherein the drive motor assembly (5) is fixedly connected to the second support arm (7), and a small bevel gear (4) is fixedly connected to the output end of the drive motor assembly (5); A third small shaft (10) is sleeved on one end of the first support arm (6) and the second support arm (7) away from the driving wheel (1); a pre-tightening large spur gear (8) is sleeved on the middle part of the third small shaft (10); and a second small shaft (9) is installed in the shaft hole on the upper part of the pre-tightening large spur gear (8); The two ends of the second small shaft (9) are respectively sleeved with the flexible holes of the first support arm (6) and the second support arm (7); The large bevel gear (3) and the small bevel gear (4) are meshed and driven; The variable diameter preload drive mechanism (A) further comprises: A special-shaped pre-tightening mounting base (11), wherein a central light hole of the special-shaped pre-tightening mounting base (11) is slidably connected to a pre-tightening rack (12), and a pre-tightening motor assembly (14) is installed at the lower part of the special-shaped pre-tightening mounting base (11); The output end of the pre-tightening motor assembly (14) is fixedly connected with a pre-tightening small spur gear (13), and the pre-tightening small spur gear (13) is engaged with the pre-tightening rack (12) to drive the pre-tightening rack (12) to move; The pre-tightening drive arm assembly (B) is rotatably connected to the upper part of the special-shaped pre-tightening mounting base (11) through the third small shaft (10), and the pre-tightening rack (12) is meshed and transmitted with the pre-tightening drive arm assembly (B) through the pre-tightening large spur gear (8).

2. A follow-up variable diameter inner drive sleeve deployment device according to claim 1, characterized in that: The sleeve assembly (C) comprises: an outer sleeve assembly, an intermediate sleeve assembly, and a center sleeve assembly; The outer sleeve assembly comprises: Outer sleeve (20); an outer connecting ring (19) fixedly connected to one end of the outer sleeve (20); and an outer limiting ring (21) fixedly connected to the other end of the outer sleeve (20); The outer sleeve (20) is provided with axially symmetrically distributed deployment locking holes (106), and the intermediate sleeve (23) and the outer sleeve (20) are locked and maintained in relative position after being deployed into position through the deployment locking holes (106); The driving wheel (1) of the pre-tightening driving arm assembly (B) abuts against the inner wall of the outer sleeve (20).

3. The follow-up variable diameter inner drive sleeve deployment device according to claim 2, characterized in that: The center sleeve assembly includes: Center sleeve (26); a central connecting ring (27) fixedly connected to the end portion of one end of the central sleeve (26); a central locking ring (25) fixedly connected to the other end of the central sleeve (26), wherein the central locking ring (25) is fixedly connected to the second connecting seat (16); The outer side surface of the central locking ring (25) is provided with axially symmetrically distributed folding locking holes (105), and the central sleeve (26) is locked with the intermediate sleeve assembly through an interlocking structure.

4. The follow-up variable diameter inner drive sleeve deployment device according to claim 3, characterized in that: The intermediate sleeve assembly comprises a plurality of intermediate sleeves (23) with the same structure and gradually increasing diameters from the inside to the outside; One end of the intermediate sleeve (23) is provided with an intermediate limiting ring (24); The other end of the intermediate sleeve (23) is fixedly connected with an intermediate locking ring (22); The outer side surface of the intermediate locking ring (22) has axially symmetrically distributed folding locking holes (105), and the intermediate sleeve (23) has axially symmetrically distributed unfolding locking holes (106); Adjacent intermediate sleeves (23) and the intermediate sleeves (23) and the central sleeve (26) are locked at the corresponding folding locking holes (105) through an interlocking structure; When the sleeve assembly (C) is unfolded, the adjacent intermediate sleeves (23), the intermediate sleeves (23) and the center sleeve (26), and the intermediate sleeves (23) and the outer sleeve (20) are locked at the corresponding unfolding locking holes (106) through an interlocking structure.

5. The follow-up variable diameter inner drive sleeve deployment device according to claim 4, characterized in that: The central locking ring (25) and the intermediate locking ring (22) are both provided with stepped holes that are axially symmetrically distributed, and the interlocking structure is integrated in the corresponding stepped holes; The interlocking structure includes: interlocking pins (28) slidably coupled to corresponding stepped holes; and A compression spring (29) is sleeved on the interlocking pin (28), one end of the compression spring (29) abuts against the end surface of the corresponding stepped hole, and the other end abuts against the stepped surface of the interlocking pin (28).

6. The follow-up variable diameter inner drive sleeve deployment device according to claim 5, characterized in that: When two adjacent sleeve assemblies are in a folded state, except for the outermost sleeve assembly, the remaining sleeve assemblies are configured as follows: the interlocking pin (28) of the sleeve assembly at the outer level extends into the folding locking hole (105) of the sleeve assembly at the inner level to achieve locking, and the other end surface of the interlocking pin (28) abuts against the inner cylindrical surface of the sleeve assembly at the outer level to maintain the locked state; When two adjacent sleeve assemblies are unfolded to a mechanical limit, the interlocking pin of the inner sleeve assembly is driven by a compression spring (29) to be embedded in the unfolding locking hole (106) of the outer sleeve assembly to achieve locking after unfolding.

7. The follow-up variable diameter inner drive sleeve deployment device according to claim 1, characterized in that: The variable diameter preload drive mechanism (A) further comprises: a grating ruler (17) fixed to one side of the preloaded rack (12); and A reading head (18) is fixed to the lower part of the special-shaped pre-tightening mounting base (11) and cooperates with the grating ruler (17).

8. The follow-up variable diameter inner drive sleeve deployment device according to claim 1, characterized in that: The flexible hole comprises: A deformable beam (104) of a long strip structure; and A circular connecting hole (103) is located at the top of the deformable beam (104).

9. The follow-up variable diameter inner drive sleeve deployment device according to claim 8, characterized in that: Strain gauges (30) are attached to both sides of the deformation beam (104).

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