Recoverable unlocking support for large-aperture space remote sensing camera

Abstract

The invention relates to a recoverable unlocking bracket for a large-aperture space remote sensing camera, which is characterized in that in a locking state, two explosive bolts respectively penetrate through central holes of an upper pressing block and a conical block and then are connected with an upper section and a lower section of a threaded connecting cylinder, and four wedge blocks are uniformly distributed along the periphery of the threaded connecting cylinder; two wedge-shaped grooves in the wedge block are matched with a first conical boss of the upper support and a second conical boss of the lower support respectively, an annular spring is arranged in a rectangular groove, a plate spring penetrates through a through hole of the wedge block and a rectangular hole of the upper pressing block, then the lower end of the plate spring is hooked on the annular groove of the lower support, and the upper end of the plate spring is fixed to the upper pressing block. And the explosive bolt is detonated and unlocked, the wedge-shaped groove is separated from the conical boss, the conical block is withdrawn, and the four wedge blocks are recovered together and clamp the threaded connecting cylinder. After unlocking, all the free structural parts in the support are restrained and recycled, the risk that the support is stuck due to irregular movement of the free structural parts or the free structural parts move to the outside of the support to become redundant objects is eliminated, and meanwhile the requirement for the large movement distance after the support is unlocked can be met.

Description

Technical Field

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

[0002] With the rapid development of large-caliber space payloads, the imaging capabilities of cameras are constantly increasing. As a connection and separation device between space remote sensing cameras and satellite platforms, unlockable camera brackets need to have good overall rigidity in the transport state to resist gravity overload during launch and orbit change. After reaching the designated orbit, the explosive bolts inside the bracket are detonated, the overall rigidity is destroyed, and the internal stress is eliminated. The satellite payload can adjust the camera posture under the movement of the flexible support. With the increase in the requirements for adjusting the camera posture, higher requirements are placed on the load-bearing capacity of the unlockable camera bracket, the movement clearance after unlocking, and the control of the internal components of the bracket after unlocking.

[0003] At present, there are two main types of unlocking brackets for space remote sensing cameras. The first type is a belt-type connection unlocking device. This type of structure has less impact on the connected parts during the unlocking process, and all components are recovered after unlocking, without free structural parts. However, the load-bearing capacity of this method is weak and cannot meet the high load-bearing capacity requirements of large-caliber space payloads. The second type is a wedge-type unlockable bracket. However, the internal structure of this bracket is relatively complex, and a large number of free structural parts will appear after unlocking. In a space environment with a large movement distance and high movement frequency of satellite payloads, the irregular movement of free structural parts may cause the bracket to get stuck or move out of the bracket, becoming redundant in space, which poses a great risk to both the satellite and the payload. Therefore, the need to develop a recyclable unlocking bracket for large-caliber space remote sensing cameras is very urgent. Summary of the invention

[0004] In view of the above problems, the present invention provides a recyclable unlocking bracket for a large-caliber space remote sensing camera, which retains the advantages of a wedge-type unlocking bracket and adds a function of recovering the free parts after unlocking. This recyclable unlocking bracket has a larger movement gap after unlocking, and the service life of the unlocking bracket is longer, which can better meet the needs of large adjustment of camera posture.

[0005] To solve the above problems, the present invention adopts the following technical solutions:

[0006] A recyclable unlocking bracket for a large-caliber space remote sensing camera comprises an upper explosive bolt, a lower explosive bolt, an upper pressure block, a threaded connection tube, a wedge block, a conical block, an upper protective cover, an upper bracket, a lower bracket, a lower protective cover, a clamping 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 a satellite platform, and the upper explosive bolt, the lower explosive bolt, the upper pressure block, the threaded connection tube, the wedge block, the conical block, the clamping 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 conical block and is connected to the lower section of the threaded connection tube. Four wedge blocks are located between the upper pressure block and the conical 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 conical block. Each wedge block is provided with two wedge grooves, two rectangular grooves and a through hole. The two wedge 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 used to install and place 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 arranged 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 clamping screw. The upper pressing block and the conical block move axially along the threaded connection tube under 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, and the lower end of the leaf spring is still hooked on the annular groove of the lower bracket.

[0009] Beneficial effects of the present invention: The large-aperture space remote sensing camera proposed in the present invention can be retracted and unlocked. After unlocking, all the free structural parts inside the bracket are constrained and retracted, 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 the irregular movement of the free structural parts during high-frequency movement of the bracket. At the same time, 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the internal structure of the bracket in the locked state;

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

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

[0013] Figure 4 is a schematic diagram of the structure of the wedge;

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

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

[0016] Explanation of the accompanying drawings: 1. upper explosive bolt; 2. lower explosive bolt; 3. upper pressure block; 31. center hole; 32. threaded hole; 33. rectangular hole; 4. threaded connection tube; 5. wedge block; 51. wedge groove; 52. rectangular groove; 53. through hole; 6. conical block; 7. upper protective cover; 71. first wiring hole; 8. upper bracket; 81. first conical boss; 9. lower bracket; 91. second conical boss; 10. lower protective cover; 101. second wiring hole; 11. clamping screw; 12. leaf spring; 13. annular spring. DETAILED DESCRIPTION

[0017] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0018] See also Figure 1-Figure 6 The embodiment of the present invention provides a recyclable unlocking bracket for a large-caliber space remote sensing camera, comprising an upper explosive bolt 1, a lower explosive bolt 2, an upper pressing 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 clamping screw 11, a leaf spring 12, and an annular spring 13. Among them, the upper protective cover 7 is threadedly connected to the top of the upper bracket 8, the flange 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 of the lower bracket 9, the flange 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 connection tube 4, the wedge block 5, the conical block 6, the clamping 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 retractable unlocking bracket of the large-aperture space remote sensing camera of the present embodiment has two working states, namely a locked state and an unlocked state.

[0020] The recyclable unlocking bracket is in the locked state: the threaded connection cylinder 4 is a cylinder with a thread running through the middle, the upper pressing block 3 is a conical block with a center hole 31, and four threaded holes 32 and four rectangular holes 33 are left around the upper pressing block 3. The threaded hole 32 is used to fix the leaf spring 12, and the rectangular hole 33 is used for the leaf spring 12 to pass through. The upper explosive bolt 1 passes through the center hole 31 of the upper pressing block 3 and is connected to the upper section of the threaded connection cylinder 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 cylinder 4. Four wedge blocks 5 are evenly distributed along the circumference of the threaded connection cylinder 4, and the bottom of the wedge block 5 cooperates with the conical surface of the conical block 6. There are two wedge-shaped grooves 51 on the wedge block 5, which respectively cooperate with the first conical boss 81 of the upper bracket 8 and the second conical boss 91 on the lower bracket 9. The flange of the upper bracket 8 is connected to the space remote sensing camera, the flange of the lower bracket 9 is connected to the satellite platform, the upper protective cover 7 is threadedly connected to 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 the diameter of the upper explosive bolt 1, to prevent the upper explosive bolt 1 from flying out after unlocking. The lower protective cover 10 is threadedly connected to 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 the diameter of the lower explosive bolt 2, to prevent the lower explosive bolt 2 from flying out after unlocking. The wedge block 5 is also provided with two rectangular grooves 52, and an annular spring 13 is installed at the position of each rectangular groove 52, and the annular spring 13 is in an extended state. Each wedge block 5 is also 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 to be hook-shaped and hooked on the annular groove reserved in the lower bracket 9. The upper end of the leaf spring 12 passes through the rectangular hole 33 of the upper pressure block 3 and is connected to the upper pressure block 3, specifically, it is installed on the threaded hole 32 through the clamping screw 11. Optionally, a fixing hole is opened at the upper end of the leaf spring 12, and the clamping screw 11 passes through the fixing hole and is threadedly connected with the threaded hole 32 to achieve the fixation of the leaf spring 12 and the upper pressure block 3. The upper pressure block 3 and the conical block 6 move axially along the threaded connection tube 4 under the action of the force of the upper explosive bolt 1 and the lower explosive bolt 2 being screwed into the threaded connection tube 4, and the four wedge blocks 5 move in their respective radial directions under the action of the upper pressure block 3 and the conical block 6.

[0021] The recyclable unlocking bracket is in the unlocking state: when unlocking, 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, 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, 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 pressing block 3. After the bracket is unlocked, all the free structural parts inside are constrained to achieve the recovery of all structural parts. There is a large gap between the upper bracket 8 and the lower bracket 9, which can meet the requirements of a large movement distance after the bracket is unlocked. Since all free structural parts are constrained after unlocking, the risk of the bracket being 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 reliability of connection between the bracket and the space remote sensing camera and the satellite platform.

[0024] The recyclable unlocking bracket of the large-caliber 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 is screwed into the threaded connection tube respectively. Under the action of the axial force, the four wedges evenly distributed along the circumference are driven to move radially. The two wedge grooves on the wedge 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 clamping screw to achieve the locking of the unlocking bracket. After unlocking, the four wedge blocks are recovered together under the action of the contraction force of the spring, the threaded connection tube is clamped by the four recovered wedge blocks, and the leaf spring passes through the wedge block to connect the lower bracket and the upper pressure block. After unlocking, all free structural parts inside the bracket are constrained and recovered. 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 when the bracket moves at a high frequency.

[0025] In addition, the large-aperture space remote sensing camera retrievable unlocking bracket proposed in the present invention has completed ground tests and on-orbit verification. The test and verification results show that the retrievable 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-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached 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 clamping 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 clamping 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) are respectively used to The annular spring (13) in an 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 arranged 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 a clamping 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 unlocking, 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 reserved 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 reserved 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 clamping 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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