Unlocking device with on-orbit manual unlocking function

Abstract

The invention relates to the technical field of spaceflight movement mechanisms, in particular to an unlocking device with an on-orbit manual unlocking function. The base mechanism is arranged in the fixing frame, the base mechanism comprises a heat release unlocking device and a base rebounding assembly, and the heat release unlocking device is arranged on the base rebounding 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; and the unlocking assembly drives the transmission assembly to rotate and move until the transmission assembly is inserted into 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 heat release unlocking device has the advantages that on the basis of a traditional heat release unlocking device, the on-orbit manual unlocking function is added, an astronaut can conduct on-orbit unlocking through the manually-unlocked driving shaft, and the unlocking reliability of the cover plate is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of aerospace activity mechanisms, and in particular to an unlocking device with an on-orbit manual unlocking function. Background Art

[0002] Space optical payloads are usually equipped with a cover structure at the light entrance. The cover structure is locked on the ground and needs to be unlocked after the spacecraft is launched into orbit. Usually, a thermal release unlocking device or pyrotechnics are used to achieve on-orbit unlocking, which places very high demands on the reliability of the unlocking device. With the construction of my country's space station, astronauts can perform a lot of on-orbit work. Adding an interface for astronauts to operate on the unlocking device will greatly improve the reliability of the system. Summary of the invention

[0003] In view of this, the present invention aims to provide an unlocking device with an on-track manual unlocking function, by which the first bevel gear and the second bevel gear are driven by the driving shaft to drive the unlocking shaft to rotate, and the unlocking spring drives the unlocking shaft to move, so as to separate the unlocking screw from the thermal release unlocking device, and then the return spring drives the rebound seat to move the thermal release unlocking device downward, thereby completing the unlocking of the cover mechanism and the base mechanism.

[0004] To achieve the above-mentioned purpose, the technical solution created by the present invention is implemented as follows: an unlocking device with an on-track manual unlocking function, comprising: a fixed frame; a base mechanism, the base mechanism is arranged in the fixed frame, the base mechanism comprises a thermal release unlocking device and a base rebound assembly, and the thermal release unlocking device is arranged on the base rebound assembly; a cover mechanism, the cover mechanism comprises a cover, a first mounting seat, an unlocking assembly, a transmission assembly and an unlocking screw; one end of the unlocking assembly is connected to the cover through the first mounting seat; the unlocking assembly is connected to the transmission assembly, and the unlocking screw is located below the transmission assembly; when the cover mechanism and the base mechanism are in a locked state, the unlocking screw is screwed to the thermal release unlocking device; when the cover 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 in the interior of the unlocking screw, and drives the unlocking screw to rotate together; at the same time, the base rebound assembly drives the thermal release unlocking device to move downward, so that the unlocking screw is separated from the thermal release unlocking device to complete the unlocking.

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

[0006] Furthermore, a second limiting seat is provided on the fixing 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 matched with the first conical surface.

[0007] Furthermore, the unlocking assembly includes a connecting seat, a second mounting seat, a driving 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 limit seat; the second mounting seat is arranged on the connecting seat, and the driving shaft passes through the second mounting seat through the first bearing and is connected to the first bevel gear.

[0008] Furthermore, the transmission assembly includes a second bevel gear, an unlocking shaft and an unlocking spring; the second bevel gear is meshed with the first bevel gear; the unlocking shaft passes through the second bevel gear and is clearance-matched with the second bevel gear; the unlocking spring is arranged on the cover plate and sleeved on the unlocking shaft; when the cover plate mechanism and the base mechanism are in a locked state, 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.

[0009] Furthermore, a penetrating 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-fitted.

[0010] Furthermore, the unlocking shaft is provided with a first threaded portion, and the first mounting seat is provided with a second threaded portion matching 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. Furthermore, the cover mechanism also includes a guide member, the guide member has an accommodating cavity, and the end of the unlocking screw is located in the accommodating cavity.

[0011] 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 arranged 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 in the interior of the fixed seat, the other end of the rebound seat is connected to the thermal release unlocking device, and the rebound seat can 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 one end of the rebound seat located inside the fixed seat; the limit block is arranged on the outer wall of the rebound seat.

[0012] Furthermore, the inner wall of the fixed seat has a third conical surface, and the outer wall of the rebound seat has a fourth conical surface that matches the third conical surface; when the cover mechanism and the base mechanism are locked, the fourth conical surface fits the third conical surface; when the cover mechanism and the base mechanism are unlocked, the return spring drives the rebound seat to move downward, so that the fourth conical surface is separated from the third conical surface until the limit block abuts against the fixed seat.

[0013] Compared with the prior art, the invention can achieve the following beneficial effects: 1) Based on the traditional thermal release unlocking device, the present invention adds an on-orbit manual unlocking function. Astronauts can unlock the cover on-orbit through the manual unlocking drive shaft, which improves the reliability of cover unlocking.

[0014] 2) Through the clearance fit between the unlocking shaft and the second bevel gear, the unlocking shaft and the second bevel gear can rotate together, and the unlocking spring can drive the unlocking shaft to move, thereby simplifying the unlocking structure.

[0015] 3) By setting a finishing pad, the problem that the rebound seat and the fixed seat cannot be completely locked during assembly due to processing errors of the two seats is solved.

[0016] 4) In order to prevent the rebound seat from rotating when the rebound seat moves inside the fixed seat, convex parts are evenly arranged on the outer wall of the rebound seat, and concave parts matching with the convex parts are arranged on the inner wall of the fixed seat.

[0017] 5) The rotation direction of the third threaded portion of the unlocking screw is set to be opposite to the rotation direction of the first threaded portion of the unlocking shaft. When the driving 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, which simplifies the unlocking process and improves the convenience and efficiency of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings: Figure 1 is a structural schematic diagram of a locked state of an unlocking device with an on-track manual unlocking function provided in an embodiment of the present invention; Figure 2 is a schematic structural diagram of an unlocking shaft and a first mounting seat in a separated state according to an embodiment of the present invention; Figure 3 is a structural schematic diagram of the unlocking completion of the unlocking device with the on-track manual unlocking function provided by an embodiment of the present invention; Figure 4 is a structural schematic diagram of a base mechanism provided according to an embodiment of the present invention; Figure 5 is a structural schematic diagram of a cover plate mechanism provided according to an embodiment of the present invention.

[0019] The accompanying drawings include: 1. fixed frame; 11. second limit seat; 12. bottom plate; 13. top plate; 14. vertical plate; 2. base mechanism; 21. thermal release unlocking device; 22. base rebound assembly; 221. rebound seat; 2211. fourth cone surface; 222. fixed seat; 2221. third cone surface; 223. return spring; 224. limit block; 225. adjustment pad; 3. cover plate mechanism; 31. unlocking assembly; 311. connecting seat; 312. second mounting seat; 313. driving 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 limit seat; 37. guide member. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the invention more clear, the invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the invention and do not constitute a limitation of the invention.

[0021] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0023] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0024] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0025] like Figures 1 to 5 As shown, an unlocking device with an on-track manual unlocking function provided by an embodiment of the present invention includes: a fixing frame 1, a base mechanism 2 and a cover mechanism 3.

[0026] The fixing frame 1 includes a bottom plate 12, a top plate 13 and two vertical plates 14 connecting the bottom plate 12 and the top plate 13, and the bottom plate 12, the top plate 13 and the two vertical plates 14 form a rectangular frame. A second limit seat 11 is also provided on the lower surface of the top plate 13, and the interior of the second limit seat 11 has a first conical surface.

[0027] The base mechanism 2 is fixed on the base plate 12, and the base mechanism 2 includes a thermal release unlocking device 21 and a base rebound assembly 22. The base rebound assembly 22 includes a rebound seat 221, a fixed seat 222, a return spring 223, a limit block 224 and an adjustment pad 225. On the rebound seat 221, a first cavity is provided along its axial direction, and on the outer wall of the rebound seat 221, convex portions are evenly provided along its circumferential direction. On the fixed seat 222, a second cavity is provided along its axial direction, and on the inner wall of the fixed seat 222, a recess matched with the convex portion is provided along its circumferential direction. In this embodiment, the thermal release unlocking device 21 is a purchased part, model: YJSF-RFL5000, purchasing manufacturer: Shanghai Satellite Engineering Research Institute.

[0028] The adjustment pad 225 is arranged on the bottom 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 rebound seat 221 is embedded in the second cavity of the fixed seat 222, and the convex part of the rebound seat 221 is embedded in the concave part of the fixed seat 222. The rebound seat 221 can move along the axial direction of the second cavity. During the movement, the rebound seat 221 is prevented from rotating due to the cooperation between the convex part and the concave part. The other end of the rebound seat 221 is connected to the thermal release unlocking device 21, one end of the reset spring 223 is connected to the fixed end of the fixed seat 222, and the other end of the reset spring 223 is connected to one end of the rebound seat 221 located in the second cavity. The limit block 224 is arranged on the outer wall of the rebound seat 221. When the rebound seat 221 moves downward, the limit block 224 abuts against the fixed seat 222 to limit the rebound seat 221.

[0029] Furthermore, a third conical surface 2221 is provided on the inner wall surface 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 rebound seat 221. When the cover mechanism 3 and the base mechanism 2 are locked, the fourth conical surface 2211 fits with the third conical surface 2221. When the cover mechanism 3 and the base mechanism 2 are unlocked, the return spring 223 drives the rebound seat 221 to move downward, so that the fourth conical surface 2211 is separated from the third conical surface 2221 until the limit block 224 abuts against the fixed seat 222. The outer wall of the fixed seat 222 is also provided with reinforcing ribs for enhancing the strength of the fixed seat 222.

[0030] In this embodiment, when the rebound seat 221 and the fixed seat 222 are in a locked state, due to a processing error, a gap will be generated between the third cone surface 2221 and the fourth cone surface 2211, resulting in the rebound seat 221 and the fixed seat 222 not being able to reach a completely locked state, and the adjustment pad 225 is required to make up for the gap. The adjustment pad 225 is used to raise the fixed seat 222, eliminate the gap between the third cone surface 2221 and the fourth cone surface 2211, and thus the rebound seat 221 and the fixed seat 222 are completely locked. Therefore, the thickness of the adjustment pad 225 is determined according to the gap between the third cone surface 2221 and the fourth cone surface 2211, and the present invention does not limit the specific thickness of the adjustment pad 225.

[0031] The cover mechanism 3 includes an unlocking assembly 31, a transmission assembly 32, an unlocking screw 33, a first mounting seat 34, a cover 35, a first limiting seat 36 and a guide member 37. A second conical surface adapted to the first conical surface is provided on the outer wall of the first limiting seat 36. A third cavity is provided along the axial direction of the first limiting seat 36. The first mounting seat 34 is provided on the cover 35, and the two ends of the unlocking assembly 31 are respectively connected to the first mounting seat 34 and the first limiting seat 36. The guide member 37 is provided in the third cavity of the first limiting seat 36 and is connected to the third cavity. A fourth cavity is provided along the axial direction of the guide member 37, and the end of the unlocking screw 33 is located in the fourth cavity.

[0032] The unlocking assembly 31 includes a connecting seat 311, a second mounting seat 312, a driving 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 arranged on the connecting seat 311, and the driving shaft 313 passes through the second mounting seat 312 through the first bearing and is connected to the first bevel gear 314.

[0033] The transmission assembly 32 includes a second bevel gear 321, an unlocking shaft 322 and an unlocking spring 323. The second bevel gear 321 is meshed with the first bevel gear 314. The unlocking shaft 322 passes through the second bevel gear 321 and is clearance-matched with the second bevel gear 321. The unlocking spring 323 is arranged on the cover plate 35 and sleeved on the unlocking shaft 322.

[0034] A hexagonal hole is provided at the center of the second bevel gear 321, 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 clearance-matched, and the clearance is set in the range of 0.15mm~0.3mm. A first threaded portion is provided on the unlocking shaft 322. A second threaded portion adapted to the first threaded portion is provided on the first mounting seat 34.

[0035] In this embodiment, the first threaded portion is an external thread, and the second threaded portion is an internal thread.

[0036] Furthermore, the connecting seat 311 includes a base, a connecting flange, and a plurality of connecting columns evenly arranged between the base and the connecting flange. The base is connected to the first limit seat 36, and the connecting flange is connected to the first mounting seat 34. A mounting hole is provided on the base, and the second bevel gear 321 is installed in the mounting hole through a second bearing. The second mounting seat 312 is arranged on the connecting column.

[0037] When the cover mechanism 3 and the base mechanism 2 are in a locked state, the first threaded portion of the unlocking shaft 322 is screwed to the second threaded portion of the first mounting seat 34, and the unlocking spring 323 is in a pre-tightened state. The first conical surface and the second conical surface fit each other, which is used to limit the position of the cover mechanism 3. At the same time, the unlocking screw 33 is screwed to the thermal release unlocking device 21, the fourth conical surface 2211 fits the third conical surface 2221, and the reset spring 223 is in a stretched state.

[0038] In this embodiment, the thread rotation direction of the unlocking screw 33 is opposite to the thread rotation direction of the first thread portion of the unlocking shaft 322 .

[0039] The unlocking process of the unlocking device with the on-track manual unlocking function is described in conjunction with the accompanying drawings. When the cover mechanism 3 needs to be unlocked, the drive shaft 313 is manually rotated so that the drive shaft 313 drives the second bevel gear 321 to rotate through the first bevel gear 314 and then drives the unlocking shaft 322 to rotate, so that the first threaded portion of the unlocking shaft 322 is separated from the second threaded portion on the first mounting seat 34. At the same time, the unlocking spring 323 drives the unlocking shaft 322 to move toward the unlocking screw 33, so that the unlocking shaft 322 is separated from the first mounting seat 34, until one end of the unlocking shaft 322 is embedded in the unlocking screw 33. The drive shaft 313 is continued to be manually rotated to disengage the unlocking screw 33 from the thermal release unlocking device 21, and the return spring 223 drives the rebound seat 221 to drive the thermal release unlocking device 21 to move downward, so that the cover mechanism 3 is separated from the base mechanism 2, and the unlocking is completed.

[0040] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An unlocking device with on-track manual unlocking function, characterized in that: include: Fixed frame; A base mechanism, the base mechanism is arranged in the fixing frame, the base mechanism comprises a thermal release unlocking device and a base rebound component, the thermal release unlocking device is arranged on the base rebound component; A cover plate mechanism, the cover plate mechanism comprising a cover plate, a first mounting seat, an unlocking assembly, a transmission assembly and an unlocking screw; one end of the unlocking assembly is connected to the cover plate through the first mounting seat; 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 mechanism is unlocked from the base mechanism, the unlocking assembly drives the transmission assembly to rotate and move until one end of the transmission assembly is embedded in the unlocking screw and drives the unlocking screw to rotate together; at the same time, the base rebound assembly drives the thermal release unlocking device to move downward, so that the unlocking screw is separated from the thermal release unlocking device to complete the unlocking.

2. The unlocking device with on-track manual unlocking function according to claim 1, characterized in that: The cover 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-track manual unlocking function according to claim 2, characterized in that: The fixing 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 is provided with a second conical surface matched with the first conical surface.

4. The unlocking device with on-track manual unlocking function according to claim 2, characterized in that: The unlocking assembly includes a connecting seat, a second mounting seat, a driving 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 arranged on the connecting seat, and the driving shaft passes through the second mounting seat through a first bearing and is connected to the first bevel gear.

5. The unlocking device with on-track 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 is meshed with the first bevel gear; the unlocking shaft passes through the second bevel gear and is clearance-matched with the second bevel gear; The unlocking spring is arranged on the cover plate and sleeved on the unlocking shaft; When the cover mechanism and the base mechanism are in a locked state, the unlocking shaft is threadedly connected to the first mounting seat, and the unlocking spring is in a pre-tightened state; at the same time, the unlocking screw is threadedly connected to the thermal release unlocking device.

6. The unlocking device with on-track manual unlocking function according to claim 5, characterized in that: A penetrating 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-fitted.

7. The unlocking device with on-track manual unlocking function according to claim 6, characterized in that: The unlocking shaft is provided with a first threaded portion, and the first mounting seat is provided with a second threaded portion matching 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-track manual unlocking function according to claim 2, characterized in that: The cover mechanism further comprises a guide member, wherein the guide member has a receiving cavity, and the end of the unlocking screw is located in the receiving cavity.

9. The unlocking device with on-track manual unlocking function according to claim 1, characterized in that: The base rebound assembly includes a rebound seat, a fixing seat, a return spring, a limit block and an adjustment pad; The adjustment pad is arranged 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 in the interior of the fixed seat, the other end of the rebound seat is connected to the thermal release unlocking device, and the rebound seat can 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 one end of the rebound seat located inside the fixed seat; the limit block is arranged on the outer wall of the rebound seat.

10. The unlocking device with on-track manual unlocking function according to claim 9, characterized in that: The inner wall of the fixing seat is provided with a third conical surface, and the outer wall of the rebound seat is provided with a fourth conical surface matched with the third conical surface; When the cover mechanism and the base mechanism are locked, the fourth conical surface fits the third conical surface; when the cover mechanism and the base mechanism are unlocked, the return spring drives the rebound seat to move downward, so that the fourth conical surface is separated from the third conical surface until the limit block abuts against the fixed seat.

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