Large aperture space remote sensing camera recoverable unlocking support

Abstract

The application relates to a large-diameter space remote sensing camera recoverable unlocking support, in a locking state, two explosive bolts are respectively connected with upper and lower sections of a threaded connecting cylinder after penetrating through central holes of an upper pressing block and a conical block, four wedge blocks are uniformly distributed along the circumference of the threaded connecting cylinder, two wedge grooves on the wedge blocks are matched with a first conical boss of an upper support and a second conical boss of a lower support respectively, a rectangular groove is used for installing and placing an annular spring, a leaf spring is hung on a lower support annular groove through a through hole of the wedge block and a rectangular hole of the upper pressing block, and the upper end of the leaf spring is fixed with the upper pressing block; the explosive bolts are exploded and unlocked, the wedge grooves are separated from the conical bosses, the conical block is withdrawn, and the four wedge blocks are recovered together and clamped on the threaded connecting cylinder. After unlocking, all free structural members in the support are constrained and recovered, the risk that the free structural members are irregularly moved to cause the support to be stuck or the free structural members are moved to the outside of the support to become redundant objects is eliminated, and the requirement of a large movement distance after the support is unlocked can be met.

Description

Technical Field

[0001] The present invention relates to the technical field of space remote sensing cameras, and in particular to a recyclable unlocking bracket for a large-aperture space remote sensing camera. Background Art

[0002] With the rapid development of large-aperture space payloads, camera imaging capabilities are constantly increasing. As the connecting and disconnecting device for space remote sensing cameras and satellite platforms, unlockable camera brackets must possess excellent overall rigidity during transport to withstand gravitational overloads during launch and orbital maneuvers. Upon reaching the designated orbit, explosive bolts within the bracket detonate, destroying the overall rigidity and eliminating internal stresses. This allows the satellite payload to adjust the camera's attitude in response to the movement of the flexible support. This increased demand for camera attitude adjustment places higher demands on the unlockable camera bracket's load-bearing capacity, the clearance after unlocking, and the control of the bracket's internal components after unlocking.

[0003] Currently, unlockable brackets for space remote sensing cameras fall into two main categories. The first is a wrap-around unlocking device. This type of structure exerts minimal impact on the connected components during unlocking, and all components are retracted after unlocking, leaving no free structural parts. However, this method has a weak load-bearing capacity and is unsuitable for the high-load-bearing requirements of large-aperture space payloads. The second type is a wedge-type unlockable bracket. However, this bracket has a more complex internal structure, resulting in a large number of free structural parts after unlocking. In the space environment of large-distance and high-frequency movement of satellite payloads, the erratic movement of the free structural parts can cause the bracket to become stuck or move out of the bracket, becoming redundant in space, posing a significant risk to both the satellite and the payload. Therefore, the need to develop a recyclable unlocking bracket for large-aperture space remote sensing cameras is urgent. Summary of the Invention

[0004] To address these issues, the present invention provides a recyclable unlocking bracket for large-aperture space remote sensing cameras. While retaining the advantages of a wedge-type unlocking bracket, it also adds the ability to recycle the freed parts after unlocking. This recyclable unlocking bracket provides greater clearance after unlocking, extending its service life and better meeting the needs of large camera posture adjustments.

[0005] In order to solve the above problems, the present invention adopts the following technical solutions:

[0006] A recyclable unlocking bracket for a large-aperture space remote sensing camera comprises an upper explosive bolt, a lower explosive bolt, an upper pressure block, a threaded connection tube, a wedge, a conical block, an upper protective cover, an upper bracket, a lower bracket, a lower protective cover, a compression screw, a leaf spring, and an annular spring, wherein the upper protective cover is threadedly connected to the top end of the upper bracket, a flange on the upper bracket is fixedly connected to the space remote sensing camera, the lower protective cover is threadedly connected to the bottom end of the lower bracket, the flange on the lower bracket is fixedly connected to the satellite platform, and the upper explosive bolt, the lower explosive bolt, the upper pressure block, the threaded connection tube, the wedge, the conical block, the compression screw, the leaf spring, and the annular spring are all located in a space formed by the upper protective cover, the upper bracket, the lower bracket, and the lower protective cover;

[0007] In the locked state, the upper explosive bolt passes through the center hole of the upper pressure block and is connected to the upper section of the threaded connection tube, and the lower explosive bolt passes through the center hole of the tapered block and is connected to the lower section of the threaded connection tube. The four wedge blocks are located between the upper pressure block and the tapered block and are evenly distributed along the circumference of the threaded connection tube. The bottom of each wedge block cooperates with the conical surface of the tapered block. Each wedge block is provided with two wedge-shaped grooves, two rectangular grooves and a through hole. The two wedge-shaped grooves cooperate with the first conical boss on the upper bracket and the second conical boss on the lower bracket respectively. The two rectangular grooves are respectively It is specially used for installing and placing an annular spring in an extended state. Four rectangular holes for the leaf spring to pass through and four threaded holes for fixing the leaf spring are provided around the upper pressing block. The lower end of the leaf spring is hook-shaped. After the leaf spring passes through the through hole and the rectangular hole, the lower end is hooked on the annular groove reserved in the lower bracket. The upper end of the leaf spring is installed on the threaded hole through a tightening screw. The upper pressing block and the conical block move axially along the threaded connection tube under the action of the pre-tightening force of the upper and lower explosive bolts screwed into the threaded connection tube. The four wedge blocks move radially under the action of the upper pressing block and the conical block.

[0008] When unlocked, the upper and lower explosive bolts detonate, the axial preload force disappears, the wedge groove disengages from the first conical boss of the upper bracket and the second conical boss of the lower bracket, the conical block is withdrawn, and the four wedge blocks are recovered together under the contraction force of the annular spring and clamp the threaded connection tube. The lower end of the leaf spring is still hooked on the annular groove of the lower bracket.

[0009] The present invention has the following beneficial effects: The large-aperture space remote sensing camera proposed in this invention features a retractable unlocking bracket. After unlocking, all free structural components within the bracket are constrained and retracted, eliminating the risk of the bracket becoming stuck or becoming redundant due to the irregular movement of free structural components during high-frequency movement. Furthermore, a large gap between the upper and lower brackets ensures the bracket can move over a large distance after unlocking. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 Schematic diagram of the internal structure of the bracket in the locked state;

[0011] Figure 2 is a sectional view of the bracket in the locked state;

[0012] Figure 3 is a structural schematic view of the upper pressing block;

[0013] Figure 4 is a structural schematic view of the wedge block;

[0014] Figure 5 is a structural schematic view of the internal structure of the bracket in the unlocked state;

[0015] Figure 6 is a sectional view of the bracket in the unlocked state.

[0016] The reference signs are as follows: 1, upper explosive bolt; 2, lower explosive bolt; 3, upper pressing block; 31, central hole; 32, threaded hole; 33, rectangular hole; 4, threaded connecting cylinder; 5, wedge block; 51, wedge-shaped groove; 52, rectangular groove; 53, through hole; 6, conical block; 7, upper protective cover; 71, first wire hole; 8, upper bracket; 81, first conical boss; 9, lower bracket; 91, second conical boss; 10, lower protective cover; 101, second wire hole; 11, compression screw; 12, leaf spring; 13, annular spring. DETAILED DESCRIPTION

[0017] The technical solutions of the present application will be described in detail below with reference to the drawings and preferred embodiments.

[0018] Reference is made to Figures 1-6 The present application provides a large-diameter space remote sensing camera recyclable unlocking bracket, which comprises an upper explosive bolt 1, a lower explosive bolt 2, an upper pressing block 3, a threaded connecting cylinder 4, a wedge block 5, a conical block 6, an upper protective cover 7, an upper bracket 8, a lower bracket 9, a lower protective cover 10, a compression screw 11, a leaf spring 12, and an annular spring 13. The upper protective cover 7 is threadedly connected to the top end of the upper bracket 8, the flange plate on the upper bracket 8 is fixedly connected to the space remote sensing camera, the lower protective cover 10 is threadedly connected to the bottom end of the lower bracket 9, the flange plate on the lower bracket 9 is fixedly connected to the satellite platform, and the upper explosive bolt 1, the lower explosive bolt 2, the upper pressing block 3, the threaded connecting cylinder 4, the wedge block 5, the conical block 6, the compression screw 11, the leaf spring 12, and the annular spring 13 are all located in the space formed by the upper protective cover 7, the upper bracket 8, the lower bracket 9, and the lower protective cover 10.

[0019] The large-diameter space remote sensing camera recyclable unlocking bracket of the present embodiment has two working states, namely a locked state and an unlocked state.

[0020] In the locked state, the recoverable unlocking bracket is as follows: the threaded connecting cylinder 4 is a middle through-threaded cylinder, the upper pressing block 3 is a conical block with a central hole 31, the upper pressing block 3 has four threaded holes 32 and four rectangular holes 33 around it, the threaded holes 32 are used for fixing the leaf spring 12, the rectangular holes 33 are used for passing the leaf spring 12, the upper explosive bolt 1 passes through the central hole 31 of the conical block 3 and is connected with the upper section of the threaded connecting cylinder 4, the lower explosive bolt 2 passes through the central hole of the conical block 6 and is connected with the lower section of the threaded connecting cylinder 4, the four wedge blocks 5 are evenly distributed along the circumference of the threaded connecting cylinder 4, and the bottom of the wedge block 5 is matched with the conical surface of the conical block 6. The wedge block 5 has two wedge-shaped grooves 51 matched with the first conical boss 81 of the upper bracket 8 and the second conical boss 91 on the lower bracket 9. The flange plate of the upper bracket 8 is connected with the space remote sensing camera, the flange plate of the lower bracket 9 is connected with the satellite platform, the upper protective cover 7 is threadedly connected with the upper bracket 8, the upper protective cover 7 has a first wiring hole 71, and the diameter of the first wiring hole 71 is smaller than that of the upper explosive bolt 1, so as to prevent the upper explosive bolt 1 from flying out after unlocking. The lower protective cover 10 is threadedly connected with the lower bracket 9, the lower protective cover 10 has a second wiring hole 101, and the diameter of the second wiring hole 101 is smaller than that of the lower explosive bolt 2, so as to prevent the lower explosive bolt 2 from flying out after unlocking. The wedge block 5 is further provided with two rectangular grooves 52, an annular spring 13 is installed at the position of each rectangular groove 52, and the annular spring 13 is in an elongated state, and each wedge block 5 is further provided with a through hole 53, and the leaf spring 12 passes through the through hole 53. The lower end of the leaf spring 12 is designed as a hook shape and is hooked on the annular groove reserved on the lower bracket 9, the upper end of the leaf spring 12 passes through the rectangular hole 33 of the upper pressing block 3 and is connected with the upper pressing block 3, specifically by being installed on the threaded hole 32 through the compression screw 11. Optionally, a fixing hole is opened at the upper end of the leaf spring 12, the compression screw 11 passes through the fixing hole and is threadedly connected with the threaded hole 32, so as to fix the leaf spring 12 with the upper pressing block 3. The upper pressing block 3 and the conical block 6 move axially along the threaded connecting cylinder 4 under the action of the force of the upper explosive bolt 1 and the lower explosive bolt 2 screwed into the threaded connecting cylinder 4, and the four wedge blocks 5 move radially under the action of the force of the upper pressing block 3 and the conical block 6.

[0021] The recyclable unlocking bracket is in the unlocked state: when unlocked, the upper explosive bolt 1 and the lower explosive bolt 2 are detonated, the axial preload force disappears, and the bracket is unlocked. The four wedges 5 are retracted together under the contraction force of the annular spring 13, and the wedge groove 51 of the wedge 5 is disengaged from the first conical boss 81 of the upper bracket 8 and the second conical boss 91 of the lower bracket 9. The conical block 6 is withdrawn, and the threaded connection tube 4 is clamped by the four retracted wedges 5. The lower end of the leaf spring 12 is still hooked on the annular groove of the lower bracket 9, and the upper end of the leaf spring 12 is connected to the upper pressure block 3. After the bracket is unlocked, all the free structural parts inside are constrained, and all the structural parts are recovered. There is a large gap between the upper bracket 8 and the lower bracket 9, which can meet the requirement of a large movement distance after the bracket is unlocked. Since all the free structural parts are constrained after unlocking, the risk of the bracket getting stuck or the free structural parts moving to the outside of the bracket and becoming redundant due to the irregular movement of the free structural parts during high-frequency movement of the bracket is eliminated.

[0022] Each wedge block 5 is provided with two wedge-shaped grooves 51, two rectangular grooves 52 and a through hole 53. Figure 5 As shown, the two rectangular grooves 52 are close to the two ends of the wedge block 5 , and the two wedge-shaped grooves 51 are located between the two rectangular grooves 52 .

[0023] Optionally, the flange on the upper bracket 8 and the flange on the lower bracket 9 are both provided with six mounting holes to achieve reliable connection between the bracket and the space remote sensing camera and the satellite platform.

[0024] The retractable unlocking bracket of the large-aperture space remote sensing camera of the present invention adopts a wedge-type unlocking method. The upper explosive bolt passes through the upper pressure block and the lower explosive bolt passes through the conical block and then screwed into the threaded connection tube respectively. Under the action of axial force, the four wedge blocks evenly distributed along the circumference are driven to move radially. The two wedge-shaped grooves on the wedge blocks cooperate with the first conical boss of the upper bracket and the second conical boss of the lower bracket. The spring is installed in the rectangular groove of the wedge block. The spring is in an extended state. The leaf spring passes through the through hole of the wedge block. The lower end of the leaf spring is hooked on the annular groove of the lower bracket. The upper end of the leaf spring is connected to the upper pressure block by a tightening screw to achieve the locking of the unlocking bracket. After unlocking, the four wedge blocks are retracted together under the action of the contraction force of the spring. The threaded connection tube is clamped by the four retracted wedge blocks. The leaf spring passes through the wedge blocks to connect the lower bracket and the upper pressure block. After unlocking, all free structural parts inside the bracket are constrained and retracted. There is a large gap between the upper bracket and the lower bracket, which can meet the requirement of a large movement distance after the bracket is unlocked, and all free structural parts are constrained after unlocking, eliminating the risk of the bracket being stuck or the free structural parts moving to the outside of the bracket and becoming redundant due to irregular movement of the free structural parts during high-frequency movement of the bracket.

[0025] In addition, the recyclable unlocking bracket for large-aperture space remote sensing cameras proposed in the present invention has completed ground tests and on-orbit verification. The test and verification results show that the recyclable unlocking bracket can be unlocked successfully and reliably, with good recovery effect, and can fully meet the requirements of large movement distance and high-frequency movement of space remote sensing cameras.

[0026] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0027] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A recyclable unlocking bracket for a large-aperture space remote sensing camera, characterized in that: The invention comprises an upper explosive bolt (1), a lower explosive bolt (2), an upper pressure block (3), a threaded connection tube (4), a wedge block (5), a conical block (6), an upper protective cover (7), an upper bracket (8), a lower bracket (9), a lower protective cover (10), a pressing screw (11), a leaf spring (12) and an annular spring (13), wherein the upper protective cover (7) is threadedly connected to the top end of the upper bracket (8), a flange on the upper bracket (8) is fixedly connected to a space remote sensing camera, the lower protective cover (10) is threadedly connected to the bottom end of the lower bracket (9), the flange on the lower bracket (9) is fixedly connected to a satellite platform, and the upper explosive bolt (1), the lower explosive bolt (2), the upper pressure block (3), the threaded connection tube (4), the wedge block (5), the conical block (6), the pressing screw (11), the leaf spring (12) and the annular spring (13) are all located in a space formed by the upper protective cover (7), the upper bracket (8), the lower bracket (9) and the lower protective cover (10); In the locked state, the upper explosive bolt (1) passes through the center hole (31) of the upper pressure block (3) and is connected to the upper section of the threaded connection tube (4); the lower explosive bolt (2) passes through the center hole of the conical block (6) and is connected to the lower section of the threaded connection tube (4); four wedge blocks (5) are located between the upper pressure block (3) and the conical block (6) and are evenly distributed along the circumference of the threaded connection tube (4); the bottom of each wedge block (5) cooperates with the conical surface of the conical block (6); each wedge block (5) is provided with two wedge grooves (51), two rectangular grooves (52) and a through hole (53); the two wedge grooves (51) respectively cooperate with the first conical boss (81) on the upper bracket (8) and the second conical boss (91) on the lower bracket (9); the two rectangular grooves (52) respectively cooperate with the first conical boss (81) on the upper bracket (8) and the second conical boss (91) on the lower bracket (9); The annular spring (13) in the extended state is installed and placed. Four rectangular holes (33) for the leaf spring (12) to pass through and four threaded holes (32) for fixing the leaf spring (12) are provided around the upper pressing block (3). The lower end of the leaf spring (12) is hook-shaped. After the leaf spring (12) passes through the through hole (53) and the rectangular hole (33), the lower end is hooked on the annular groove reserved in the lower bracket (9). The upper end of the leaf spring (12) is installed on the threaded hole (32) through the tightening screw (11). The upper pressing block (3) and the conical block (6) move axially along the threaded connection tube (4) under the action of the pre-tightening force of the upper explosive bolt (1) and the lower explosive bolt (2) screwed into the threaded connection tube (4). The four wedge blocks (5) move radially under the action of the upper pressing block (3) and the conical block (6); When unlocked, the upper explosive bolt (1) and the lower explosive bolt (2) are detonated, the axial preload force disappears, the wedge groove (51) is disengaged from the first conical boss (81) and the second conical boss (91), the conical block (6) is withdrawn, and the four wedge blocks (5) are recovered together under the contraction force of the annular spring (13) and clamp the threaded connection tube (4), and the lower end of the leaf spring (12) is still hooked on the annular groove of the lower bracket (9).

2. The recyclable unlocking bracket for a large-aperture space remote sensing camera according to claim 1, characterized in that: A first wiring hole (71) is left at the top of the upper protective cover (7), and the diameter of the first wiring hole (71) is smaller than the diameter of the upper explosive bolt (1).

3. The recyclable unlocking bracket for a large-aperture space remote sensing camera according to claim 1, characterized in that: A second wiring hole (101) is left at the bottom of the lower protective cover (10), and the diameter of the second wiring hole (101) is smaller than the diameter of the lower explosive bolt (2).

4. The recyclable unlocking bracket for a large-aperture space remote sensing camera according to claim 1, characterized in that: A fixing hole is provided at the upper end of the leaf spring (12), and the pressing screw (11) passes through the fixing hole and is threadedly connected with the threaded hole (32).

5. The recyclable unlocking bracket for a large-aperture space remote sensing camera according to claim 1, characterized in that: On each wedge block (5), the two wedge-shaped grooves (51) are located between the two rectangular grooves (52).

6. The recyclable unlocking bracket for a large-aperture space remote sensing camera according to claim 1, characterized in that: The flanges on the upper bracket (8) and the lower bracket (9) are respectively provided with six mounting holes.

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