Unlocking device with on-track manual unlocking function

Abstract

The application relates to the technical field of space activity mechanisms, in particular to an unlocking device with an on-orbit manual unlocking function, which comprises a fixed frame, a base mechanism, a cover plate mechanism, a heat release unlocking device and a base spring assembly, wherein the base mechanism is arranged in the fixed frame and comprises the heat release unlocking device and the base spring assembly, the heat release unlocking device is arranged on the base spring assembly, the cover plate mechanism comprises an unlocking assembly, a transmission assembly and an unlocking screw rod, the unlocking assembly is connected with the transmission assembly, and the unlocking screw rod is located below the transmission assembly; the unlocking assembly drives the transmission assembly to rotate and move until the transmission assembly is inserted into the inside of the unlocking screw rod and drives the unlocking screw rod to rotate together, so that the cover plate mechanism is separated from the base mechanism, and unlocking is completed. The application has the advantages that the on-orbit manual unlocking function is added on the basis of the traditional heat release unlocking device, astronauts can perform on-orbit unlocking through a manual unlocking driving shaft, and the reliability of the cover plate unlocking is improved.

Description

Technical Field

[0001] This invention relates to the field of aerospace activity mechanism technology, and in particular to an unlocking device with on-orbit manual unlocking function. Background Technology

[0002] Spaceborne optical payloads typically have a cover structure at the light inlet, which is locked on the ground and needs to be unlocked after the spacecraft is launched into orbit. On-orbit unlocking is usually achieved using a thermal release unlocking device or pyrotechnics, which places extremely high demands on the reliability of the unlocking device. With the construction of my country's space station, astronauts can perform many on-orbit tasks. Adding an interface that allows astronauts to operate the unlocking device will greatly improve the system's reliability. Summary of the Invention

[0003] In view of this, the present invention aims to provide an unlocking device with on-track manual unlocking function. The unlocking device is driven by a drive shaft to drive the first bevel gear and the second bevel gear to rotate, and the unlocking spring drives the unlocking shaft to move, thereby separating the unlocking screw from the thermal release unlocking device. Then, the return spring drives the return seat to move the thermal release unlocking device down, thereby completing the unlocking of the cover plate mechanism and the base mechanism.

[0004] To achieve the above objectives, the technical solution of this invention is implemented as follows: An unlocking device with on-orbit manual unlocking function includes: a fixed frame; a base mechanism disposed within the fixed frame, the base mechanism including a thermal release unlocking device and a base spring-loaded assembly, the thermal release unlocking device being disposed on the base spring-loaded assembly; a cover plate mechanism including a cover plate, a first mounting base, an unlocking assembly, a transmission assembly, and an unlocking screw; one end of the unlocking assembly is connected to the cover plate via the first mounting base; the unlocking assembly is connected to the transmission assembly, and the unlocking screw is located below the transmission assembly; when the cover plate mechanism and the base mechanism are in a locked state, the unlocking screw is screwed to the thermal release unlocking device; when the cover plate mechanism and the base mechanism are unlocked, the unlocking assembly drives the transmission assembly to rotate and move until one end of the transmission assembly is embedded inside the unlocking screw, and drives the unlocking screw to rotate together; simultaneously, the base spring-loaded assembly drives the thermal release unlocking device to move downward, causing the unlocking screw to separate from the thermal release unlocking device, thus completing the unlocking.

[0005] Furthermore, the cover plate mechanism also includes a first limiting seat, and the other end of the unlocking component is connected to the first limiting seat.

[0006] Furthermore, a second limiting seat is provided on the fixed frame. The inner surface of the second limiting seat is a first conical surface, and the outer wall of the first limiting seat has a second conical surface that matches the first conical surface.

[0007] Furthermore, the unlocking component includes a connecting seat, a second mounting seat, a drive shaft, and a first bevel gear; one end of the connecting seat is connected to the first mounting seat, and the other end of the connecting seat is connected to the first limiting seat; the second mounting seat is disposed on the connecting seat, and the drive shaft passes through the second mounting seat and is connected to the first bevel gear via a first bearing.

[0008] Furthermore, the transmission assembly includes a second bevel gear, an unlocking shaft, and an unlocking spring; the second bevel gear meshes with the first bevel gear; the unlocking shaft passes through the second bevel gear and is clearance-fitted with the second bevel gear; the unlocking spring is disposed on the cover plate and sleeved on the unlocking shaft; when the cover plate mechanism and the base mechanism are in the locked state, the unlocking shaft is screwed to the first mounting seat, and the unlocking spring is in the pre-tightened state; at the same time, the unlocking screw is screwed to the thermal release unlocking device.

[0009] Furthermore, a through hexagonal hole is provided at the center of the second bevel gear, and the unlocking shaft is a hexagonal shaft; the unlocking shaft passes through the hexagonal hole, and the unlocking shaft and the hexagonal hole are clearance fit.

[0010] Furthermore, the unlocking shaft is provided with a first threaded portion, and the first mounting seat is provided with a second threaded portion that matches the first threaded portion; the unlocking screw is provided with a third threaded portion, and the direction of rotation of the third threaded portion is opposite to that of the first threaded portion.

[0011] Furthermore, the cover plate mechanism also includes a guide with a receiving cavity, in which the end of the unlocking screw is located.

[0012] Furthermore, the base rebound assembly includes a rebound seat, a fixed seat, a return spring, a limit block, and an adjustment pad; the adjustment pad is located at the bottom of the fixed frame, the fixed end of the fixed seat is connected to the adjustment pad, one end of the rebound seat is embedded inside the fixed seat, and the other end of the rebound seat is connected to the thermal release unlocking device, allowing the rebound seat to move relative to the fixed seat axis; one end of the return spring is connected to the fixed end of the fixed seat, and the other end of the return spring is connected to the end of the rebound seat located inside the fixed seat; the limit block is located on the outer wall of the rebound seat.

[0013] Furthermore, the inner wall of the fixed seat has a third conical surface, and the outer wall of the spring seat has a fourth conical surface that matches the third conical surface; when the cover plate mechanism and the base mechanism are locked, the fourth conical surface fits into the third conical surface; when the cover plate mechanism and the base mechanism are unlocked, the return spring drives the spring seat to move down, causing the fourth conical surface to separate from the third conical surface, until the limit block abuts against the fixed seat.

[0014] Compared with the prior art, the present invention can achieve the following beneficial effects:

[0015] 1) Based on the traditional thermal release unlocking device, the present invention adds an on-orbit manual unlocking function, which allows astronauts to unlock the cover plate on-orbit through the manual unlocking drive shaft, thereby improving the reliability of the cover plate unlocking.

[0016] 2) By using the clearance fit between the unlocking shaft and the second bevel gear, both the unlocking shaft and the second bevel gear can rotate together, and the unlocking spring can drive the unlocking shaft to move, thus simplifying the unlocking structure.

[0017] 3) By setting a trimming pad, the problem that the springback seat and the fixed seat could not be fully locked during assembly due to machining errors was solved.

[0018] 4) To prevent the spring seat from rotating during its movement inside the fixed seat, protrusions are evenly distributed on the outer wall of the spring seat, and recesses that match the protrusions are provided on the inner wall of the fixed seat.

[0019] 5) The direction of rotation of the third thread of the unlocking screw is set to be opposite to that of the first thread of the unlocking shaft. When the drive shaft rotates in the same direction, the threaded connection between the unlocking shaft and the first mounting seat can be separated, and the unlocking screw can be separated from the thermal release unlocking device at the same time. This simplifies the unlocking process and improves the convenience and efficiency of operation. Attached Figure Description

[0020] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0021] Figure 1 This is a schematic diagram of the locked state of the unlocking device with on-orbit manual unlocking function provided in an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure provided by an embodiment of the present invention, showing the unlocking shaft and the first mounting base in a separated state;

[0023] Figure 3 This is a schematic diagram of the unlocking device with on-orbit manual unlocking function provided in an embodiment of the present invention after unlocking is completed;

[0024] Figure 4 This is a schematic diagram of the base mechanism provided according to an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the cover plate mechanism provided according to an embodiment of the present invention.

[0026] The reference numerals in the attached drawings include: 1. Fixed frame; 11. Second limiting seat; 12. Base plate; 13. Top plate; 14. Vertical plate; 2. Base mechanism; 21. Thermal release unlocking device; 22. Base spring-loaded assembly; 221. Spring-loaded seat; 2211. Fourth conical surface; 222. Fixed seat; 2221. Third conical surface; 223. Return spring; 224. Limiting block; 225. Adjustment pad; 3. Cover plate mechanism; 31. Unlocking assembly; 311. Connecting seat; 312. Second mounting seat; 313. Drive shaft; 314. First bevel gear; 32. Transmission assembly; 321. Second bevel gear; 322. Unlocking shaft; 323. Unlocking spring; 33. Unlocking screw; 34. First mounting seat; 35. Cover plate; 36. First limiting seat; 37. Guide component. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not constitute a limitation thereof.

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0029] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0030] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0031] The invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0032] like Figures 1 to 5 As shown in the figure, an unlocking device with on-track manual unlocking function provided by an embodiment of the present invention includes: a fixed frame 1, a base mechanism 2 and a cover plate mechanism 3.

[0033] The fixed frame 1 includes a base plate 12, a top plate 13, and two upright plates 14 connecting the base plate 12 and the top plate 13. The base plate 12, the top plate 13, and the two upright plates 14 form a rectangular frame. A second limiting seat 11 is also provided on the lower surface of the top plate 13. The interior of the second limiting seat 11 has a first conical surface.

[0034] The base mechanism 2 is fixed to the base plate 12. The base mechanism 2 includes a thermal release unlocking device 21 and a base spring assembly 22. The base spring assembly 22 includes a spring seat 221, a fixed seat 222, a return spring 223, a limiting block 224, and an adjusting pad 225. A first cavity is provided through the spring seat 221 along its axial direction, and protrusions are evenly provided along its circumference on the outer wall of the spring seat 221. A second cavity is provided through the fixed seat 222 along its axial direction, and recesses that match the protrusions are provided along the circumference on the inner wall of the fixed seat 222. In this embodiment, the thermal release unlocking device 21 is a purchased component, model: YJSF-RFL5000, purchased from the Shanghai Satellite Engineering Research Institute.

[0035] Adjustment pad 225 is mounted on the base plate 12 of the fixed frame 1, and the fixed end of the fixed seat 222 is connected to the adjustment pad 225. One end of the spring seat 221 is embedded in the second cavity of the fixed seat 222, and the protrusion of the spring seat 221 is embedded in the recess of the fixed seat 222. The spring seat 221 can move axially along the second cavity. During the movement, the cooperation between the protrusion and the recess prevents the spring seat 221 from rotating. The other end of the spring seat 221 is connected to the thermal release unlocking device 21. One end of the return spring 223 is connected to the fixed end of the fixed seat 222, and the other end of the return spring 223 is connected to the end of the spring seat 221 located in the second cavity. Limiting block 224 is mounted on the outer wall of the spring seat 221. When the spring seat 221 moves downward, the limiting block 224 abuts against the fixed seat 222, thereby limiting the movement of the spring seat 221.

[0036] Furthermore, a third conical surface 2221 is provided on the inner wall of the second cavity of the fixed seat 222, and a fourth conical surface 2211 adapted to the third conical surface 2221 is provided on the outer wall of the spring seat 221. When the cover plate mechanism 3 is locked with the base mechanism 2, the fourth conical surface 2211 is in contact with the third conical surface 2221. When the cover plate mechanism 3 is unlocked from the base mechanism 2, the return spring 223 drives the spring seat 221 to move downward, causing the fourth conical surface 2211 to separate from the third conical surface 2221, until the limiting block 224 abuts against the fixed seat 222. The outer wall of the fixed seat 222 is also provided with reinforcing ribs to enhance the strength of the fixed seat 222.

[0037] In this embodiment, when the spring return seat 221 and the fixed seat 222 are in the locked state, a gap may occur between the third conical surface 2221 and the fourth conical surface 2211 due to machining errors. This prevents the spring return seat 221 and the fixed seat 222 from achieving a fully locked state, requiring an adjustment shim 225 to compensate for this gap. By raising the fixed seat 222 with the adjustment shim 225, the gap between the third conical surface 2221 and the fourth conical surface 2211 is eliminated, thereby enabling the spring return seat 221 and the fixed seat 222 to be fully locked. Therefore, the thickness of the adjustment shim 225 is determined based on the gap between the third conical surface 2221 and the fourth conical surface 2211, and the present invention does not limit the specific thickness of the adjustment shim 225.

[0038] The cover plate mechanism 3 includes an unlocking assembly 31, a transmission assembly 32, an unlocking screw 33, a first mounting base 34, a cover plate 35, a first limiting base 36, and a guide member 37. The outer wall of the first limiting base 36 has a second conical surface adapted to the first conical surface. A through-hole third cavity is provided on the first limiting base 36 along its axial direction. The first mounting base 34 is disposed on the cover plate 35, and both ends of the unlocking assembly 31 are connected to the first mounting base 34 and the first limiting base 36, respectively. The guide member 37 is disposed within and connected to the third cavity of the first limiting base 36. A through-hole fourth cavity is provided on the guide member 37 along its axial direction, and the end of the unlocking screw 33 is located within the fourth cavity.

[0039] The unlocking assembly 31 includes a connecting seat 311, a second mounting seat 312, a drive shaft 313, and a first bevel gear 314. One end of the connecting seat 311 is connected to the first mounting seat 34, and the other end of the connecting seat 311 is connected to the first limiting seat 36. The second mounting seat 312 is disposed on the connecting seat 311, and the drive shaft 313 passes through the second mounting seat 312 via a first bearing and is connected to the first bevel gear 314.

[0040] The transmission assembly 32 includes a second bevel gear 321, an unlocking shaft 322, and an unlocking spring 323. The second bevel gear 321 meshes with the first bevel gear 314. The unlocking shaft 322 passes through the second bevel gear 321 and is clearance-fitted with it. The unlocking spring 323 is mounted on the cover plate 35 and sleeved on the unlocking shaft 322.

[0041] The second bevel gear 321 has a through hexagonal hole at its center, and the unlocking shaft 322 is a hexagonal shaft. When the unlocking shaft 322 passes through the hexagonal hole, the unlocking shaft 322 and the hexagonal hole are in clearance fit, with the clearance set in the range of 0.15mm to 0.3mm. The unlocking shaft 322 has a first threaded portion. The first mounting base 34 has a second threaded portion that matches the first threaded portion.

[0042] In this embodiment, the first threaded portion is an external thread, and the second threaded portion is an internal thread.

[0043] Furthermore, the connecting seat 311 includes a base, a connecting flange, and a plurality of connecting posts evenly disposed between the base and the connecting flange. The base is connected to the first limiting seat 36, and the connecting flange is connected to the first mounting seat 34. The base is provided with mounting holes, and the second bevel gear 321 is mounted in the mounting holes via a second bearing. The second mounting seat 312 is disposed on the connecting posts.

[0044] When the cover plate mechanism 3 and the base mechanism 2 are locked, the first threaded portion of the unlocking shaft 322 is screwed into the second threaded portion of the first mounting seat 34, and the unlocking spring 323 is in a pre-tightened state. The first and second conical surfaces fit together to limit the cover plate mechanism 3. At the same time, the unlocking screw 33 is screwed into the thermal release unlocking device 21, the fourth conical surface 2211 fits into the third conical surface 2221, and the return spring 223 is in a stretched state.

[0045] In this embodiment, the thread direction of the unlocking screw 33 is opposite to the thread direction of the first thread portion of the unlocking shaft 322.

[0046] The unlocking process of the unlocking device with on-orbit manual unlocking function is described with reference to the accompanying drawings. When it is necessary to unlock the cover plate mechanism 3, the drive shaft 313 is manually rotated, causing the drive shaft 313 to drive the second bevel gear 321 to rotate via the first bevel gear 314, which in turn drives the unlocking shaft 322 to rotate, causing the first threaded portion of the unlocking shaft 322 to separate from the second threaded portion on the first mounting base 34. At the same time, the unlocking spring 323 drives the unlocking shaft 322 to move toward the unlocking screw 33, causing the unlocking shaft 322 to separate from the first mounting base 34 until one end of the unlocking shaft 322 is embedded inside the unlocking screw 33. The drive shaft 313 is then manually rotated again, causing the unlocking screw 33 to disengage from the thermal release unlocking device 21. The return spring 223 drives the return seat 221 to move the thermal release unlocking device 21 downward, thereby separating the cover plate mechanism 3 from the base mechanism 2, completing the unlocking process.

[0047] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. An unlocking device with on-orbit manual unlocking function, characterized in that, include: Fixed frame; A base mechanism is disposed within the fixed frame. The base mechanism includes a thermal release unlocking device and a base spring-back assembly. The thermal release unlocking device is disposed on the base spring-back assembly. A cover plate mechanism includes a cover plate, a first mounting base, an unlocking component, a transmission component, and an unlocking screw; one end of the unlocking component is connected to the cover plate through the first mounting base; the unlocking component is connected to the transmission component, and the unlocking screw is located below the transmission component; when the cover plate mechanism and the base mechanism are in a locked state, the unlocking screw is screwed to the thermal release unlocking device. When the cover plate mechanism is unlocked from the base mechanism, the unlocking component drives the transmission component to rotate and move until one end of the transmission component is embedded in the interior of the unlocking screw, and drives the unlocking screw to rotate together, so that the unlocking screw disengages from the thermal release unlocking device. The base spring-back component drives the thermal release unlocking device to move down, so that the cover plate mechanism is separated from the base mechanism, and the unlocking is completed.

2. The unlocking device with on-orbit manual unlocking function according to claim 1, characterized in that, The cover plate mechanism also includes a first limiting seat, and the other end of the unlocking component is connected to the first limiting seat.

3. The unlocking device with on-orbit manual unlocking function according to claim 2, characterized in that, The fixed frame is provided with a second limiting seat, the inner surface of the second limiting seat is a first conical surface, and the outer wall of the first limiting seat has a second conical surface that matches the first conical surface.

4. The unlocking device with on-orbit manual unlocking function according to claim 2, characterized in that, The unlocking assembly includes a connecting seat, a second mounting seat, a drive shaft, and a first bevel gear; one end of the connecting seat is connected to the first mounting seat, and the other end of the connecting seat is connected to the first limiting seat; the second mounting seat is disposed on the connecting seat, and the drive shaft passes through the second mounting seat and is connected to the first bevel gear via a first bearing.

5. The unlocking device with on-orbit manual unlocking function according to claim 4, characterized in that, The transmission assembly includes a second bevel gear, an unlocking shaft, and an unlocking spring; The second bevel gear meshes with the first bevel gear; the unlocking shaft passes through the second bevel gear and is clearance-fitted with the second bevel gear; The unlocking spring is disposed on the cover plate and sleeved on the unlocking shaft; When the cover plate mechanism and the base mechanism are locked, the unlocking shaft is screwed to the first mounting seat, and the unlocking spring is in a pre-tightened state; at the same time, the unlocking screw is screwed to the thermal release unlocking device.

6. The unlocking device with on-orbit manual unlocking function according to claim 5, characterized in that, The second bevel gear has a through hexagonal hole at its center, and the unlocking shaft is a hexagonal shaft; the unlocking shaft passes through the hexagonal hole, and the unlocking shaft and the hexagonal hole are in clearance fit.

7. The unlocking device with on-orbit manual unlocking function according to claim 6, characterized in that, The unlocking shaft is provided with a first threaded portion, and the first mounting base is provided with a second threaded portion that matches the first threaded portion; the unlocking screw is provided with a third threaded portion, and the rotation direction of the third threaded portion is opposite to that of the first threaded portion.

8. The unlocking device with on-orbit manual unlocking function according to claim 2, characterized in that, The cover plate mechanism further includes a guide member having a receiving cavity, and the end of the unlocking screw is located within the receiving cavity.

9. The unlocking device with on-orbit manual unlocking function according to claim 1, characterized in that, The base rebound assembly includes a rebound seat, a fixed seat, a return spring, a limit block, and an adjustment pad; The adjustment pad is disposed at the bottom of the fixed frame, the fixed end of the fixed seat is connected to the adjustment pad, one end of the spring seat is embedded inside the fixed seat, the other end of the spring seat is connected to the thermal release unlocking device, and the spring seat can move relative to the axis of the fixed seat; one end of the return spring is connected to the fixed end of the fixed seat, and the other end of the return spring is connected to the end of the spring seat located inside the fixed seat; the limiting block is disposed on the outer wall of the spring seat.

10. The unlocking device with on-orbit manual unlocking function according to claim 9, characterized in that, The inner wall of the fixed seat has a third conical surface, and the outer wall of the spring seat has a fourth conical surface that matches the third conical surface; When the cover plate mechanism is locked with the base mechanism, the fourth conical surface is in contact with the third conical surface; when the cover plate mechanism is unlocked from the base mechanism, the reset spring drives the rebound seat to move down, causing the fourth conical surface to separate from the third conical surface, until the limiting block abuts against the fixed seat.

Images