In-orbit emergency reset mechanism

Abstract

The application specifically relates to an on-orbit emergency reset mechanism, and aims at solving the technical problems of the on-orbit emergency scheme transmission link of the existing main optical system light path movement mechanism, high complexity, reduced on-orbit reliability, and the fact that a coil spring always participates in the rotation of a rotating shaft, the two are not decoupled, and the motor driving torque and the coil spring failure risk are increased. The on-orbit emergency reset mechanism comprises a base, an emergency reset module arranged on one side wall of the base, a swing module arranged on the other side wall of the base, a first limiting block and a second limiting block; the emergency reset module comprises a supporting seat, a rotating shaft, a pin puller, a reset disc and an emergency lever; the swing module comprises a swing rotating shaft, a swing movable rod and a swing piece; the emergency lever is matched with the swing piece and is used for pushing the swing piece to reset so that the load is cut off from the light path during emergency reset.

Description

Technical Field

[0001] This invention specifically relates to an on-orbit emergency reset mechanism. Background Technology

[0002] For on-orbit optical payloads, motion mechanisms are designed to enter and exit the optical path. During normal operation, these mechanisms do not enter the main optical path and do not affect imaging. When a specific function needs to be performed, such as inserting a calibration optical path, these mechanisms, driven by a drive source, rotate or translate the load to enter the system's main optical path to perform the specific function. After completion, the drive source drives the load to exit the system's main optical path.

[0003] The motion mechanism that needs to switch in and out of the main optical system's optical path to perform specific functions may fail to switch out of the optical path and return to its initial position due to reasons such as increased resistance, insufficient motor driving force, motor failure, or control circuit failure. At this time, because the load is located at a certain position in the main optical path of the system, it will block the main optical system's optical path, causing the ground object radiation of the remote sensing payload to not reach the detector, and the remote sensing camera to completely fail.

[0004] Traditional on-orbit emergency solutions involve using two or more sets of motors for backup during the design phase. This approach cannot address failures caused by motor control malfunctions or broken motor cables, and the inherent cogging torque of the motors increases driving resistance. Furthermore, it significantly increases costs. Chinese patent CN104932606A discloses an "Emergency Reset Device for a Spaceborne Calibration Mechanism Failure," which utilizes the expansion and contraction effect of a shape memory alloy rod to disengage the gears in the calibration mechanism through leverage, allowing the rotating shaft to return to its original position under the action of a coil spring. However, this emergency device involves numerous transmission components, resulting in high complexity and reduced on-orbit reliability. Additionally, the coil spring is always involved in the shaft's rotation, and the lack of decoupling increases the motor driving torque and the risk of coil spring failure. Summary of the Invention

[0005] The purpose of this invention is to solve the technical problems of existing main optical system optical path motion mechanism on-orbit emergency solutions having many transmission links, high complexity, reduced on-orbit reliability, and the coil spring always participating in the rotation of the shaft, without decoupling, which increases the motor drive torque and the risk of coil spring failure. Therefore, this invention provides an on-orbit emergency reset mechanism.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An on-orbit emergency reset mechanism is characterized by comprising a base, an emergency reset module disposed on one side wall of the base, a swing module disposed on the other side wall of the base, a first limiting block, and a second limiting block;

[0008] The emergency reset module includes a support base, a rotating shaft coaxially rotatably disposed within the support base, a puller connected to the outer wall of the support base, a reset plate connected to the end of the rotating shaft away from the base, and an emergency lever connected to the other end of the rotating shaft.

[0009] The pin puller is equipped with a pin puller pin, and the reset plate has multiple outer pin holes evenly distributed around its circumference to mate with the pin puller pin; the pin puller is electrically connected to external equipment and is used to retract the pin puller pin when the emergency reset is powered on.

[0010] A flat coil spring is sleeved between the rotating shaft and the support base; the inner interface of the flat coil spring is connected to the rotating shaft, and the outer interface is engaged with the support base. The flat coil spring is used to drive the emergency lever to rotate during emergency reset.

[0011] The swing module includes a swing shaft, a swing rod, and a swing component; the swing shaft is connected to the base via a bearing, one end of the swing shaft passes through the base and is fixed to the swing component, and one side of the swing shaft is used to set a load; the swing rod is connected to the other side of the swing shaft and is located close to the base, and is used to swing between the first limit block and the second limit block when the swing shaft rotates.

[0012] The emergency lever works in conjunction with the swing element to push the swing element to reset during an emergency reset, causing the load to cut off the optical path.

[0013] Furthermore, the emergency lever includes a lever body and a lever tab disposed on the side wall of the lever body; the lever body is a cylindrical structure and has a first blind hole that is adapted to the other end of the rotating shaft.

[0014] The swing component includes a swing body connected to one end of the swing shaft and a swing plate disposed on the side wall of the swing body; the swing body is a cylindrical structure, and a second blind hole is provided at the end away from the swing shaft.

[0015] The oscillating plate has an L-shaped structure; the oscillating body and the lever body are coaxially arranged; one end of the L-shaped structure of the oscillating plate is connected to the side wall of the oscillating body, and the other end protrudes from the oscillating body along the axis to cooperate with the lever plate.

[0016] Furthermore, the reset disk is provided with a plurality of inner pin holes along the circumference; the circumference where the plurality of inner pin holes are located and the circumference where the plurality of outer pin holes are located form a concentric circle, and the inner pin holes and the outer pin holes correspond one-to-one radially.

[0017] The cross-section of the other end of the shaft is a regular polygon, and the sides of the regular polygon correspond one-to-one with multiple outer pin holes and multiple inner pin holes in the radial direction, which is used to adjust the stored torque of the planar coil spring; the first blind hole is correspondingly set as a regular polygon.

[0018] Furthermore, the emergency reset module also includes an upper cover plate located between the reset plate and one end of the support base, and a locking nut for fixing the reset plate;

[0019] One end of the rotating shaft passes through the upper cover plate, the reset plate, and the locking nut in sequence.

[0020] The upper cover plate has multiple upper cover plate pin holes at positions corresponding to multiple inner pin holes. The upper cover plate is coaxially connected to the reset plate through the upper cover plate pin holes and multiple inner pin holes. The outer side of the upper cover plate is connected to the support base. A flat coil spring is set between the upper cover plate and the support base.

[0021] An observation window is provided on the side wall of the support base at a position corresponding to the emergency lever and the swing component.

[0022] Furthermore, the swing lever includes a U-shaped frame adapted to the swing axis and a movable section fixedly connected to the U-shaped frame; the U-shaped frame is fixedly connected to the swing axis; the movable section is located between the first limiting block and the second limiting block.

[0023] Furthermore, the swing module also includes a bearing outer end cover connected to one side wall of the base; one end of the swing shaft passes through the bearing outer end cover and is coaxially fixed to the swing component; a spacer is provided between the swing shaft and the base, and the spacer is located near the other side wall of the base.

[0024] Furthermore, the emergency reset module also includes a first friction pad disposed between the support base and the emergency lever, a second friction pad disposed between the reset plate and the upper cover plate, and a heat-insulating trimming pad disposed between the outer wall of the support base and the pin puller.

[0025] Furthermore, the rotating shaft is provided with a rotating shaft groove along the axial direction; a coil spring interface is provided on the side wall of the support base; the inner interface of the planar coil spring is connected to the rotating shaft groove, and the outer interface is engaged with the coil spring interface.

[0026] A positioning step is provided on the side wall of the other end of the rotating shaft; a partition is provided inside the support base, and a step hole adapted to the positioning step is provided on the partition; the other end of the rotating shaft is rotatably connected to the support base through the step hole.

[0027] Furthermore, there are twelve outer pin holes and twelve inner pin holes. The twelve outer pin holes are all radially arranged waist-shaped grooves, and the width of the waist-shaped grooves is adapted to the pin of the pin puller. The reset plate is provided with a waist-shaped hole of the rotating shaft adapted to one end of the rotating shaft. One end of the rotating shaft passes through the waist-shaped hole of the rotating shaft and is connected to the locking nut. The cross-section of the other end of the rotating shaft and the first blind hole are both regular dodecagons.

[0028] Furthermore, the sides of the first limiting block and the second limiting block that are close to each other form a reset angle with the line connecting the central axis of the swing shaft in the same radial plane, and the reset angle is 95 degrees.

[0029] The beneficial effects of this invention are:

[0030] (1) The present invention provides an on-orbit emergency reset mechanism that can reset the load that has entered the optical path to its initial position, thereby avoiding complete blinding of the main optical system due to the obstruction of the optical path and improving the reliability of the on-orbit remote sensing payload.

[0031] (2) The present invention provides an on-orbit emergency reset mechanism, which has the advantages of not increasing additional power consumption, having a large stored torque, not affecting the normal operation of the main mechanism, and being able to perform at least one emergency operation. It only resets when there is an on-orbit abnormality that cannot be resolved.

[0032] (3) The present invention provides an on-orbit emergency reset mechanism, which solves the problem of blocking the main optical path when the motion mechanism performing a specific function on the orbit is abnormal. When the motion mechanism performing the specific function is working normally, the emergency reset mechanism does not participate in the work (i.e., does not participate in the rotation of the load) and does not couple. It only executes when the load position is abnormal, which reduces the complexity of the system.

[0033] (4) The present invention provides an on-orbit emergency reset mechanism that has no long-term energized components, does not occupy satellite power consumption, and is only energized in an emergency. At this time, the main functional components of the satellite are not working, so its temporary power consumption is far lower than the peak power consumption of the satellite.

[0034] (5) The present invention provides an on-orbit emergency reset mechanism in which the stored torque of the planar coil spring can be adaptively adjusted according to the characteristics of the assembled product. The stored torque is large and can be adjusted in multiple gears, which is much greater than the friction torque.

[0035] (6) The present invention provides an on-orbit emergency reset mechanism that can perform ≥1 emergency. When the driving source torque is greater than the sum of the stored torque and friction torque designed by the planar coil spring, it can drive the load to rotate while driving the planar coil spring in the emergency reset to rotate, thereby ensuring that after the first emergency, the load can still enter the optical path to perform specific functions.

[0036] (7) The on-orbit emergency reset mechanism of the present invention can replace the planar coil spring with a tension spring or a compression spring, and after adaptive modification of the protected mechanism, the on-orbit emergency reset mechanism of the present invention can be applied from the field of rotary mechanism to the field of linear motion. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of an embodiment of an on-orbit emergency reset mechanism according to the present invention;

[0038] Figure 2 This is a schematic diagram of the reset disk structure in an embodiment of the present invention;

[0039] Figure 3 This is a schematic diagram of the emergency reset module in an embodiment of the present invention;

[0040] Figure 4This is a schematic diagram of the support base in an embodiment of the present invention;

[0041] Figure 5 This is a schematic diagram of the structure of the rotating shaft in an embodiment of the present invention;

[0042] Figure 6 This is a schematic diagram of the internal structure of the emergency reset mechanism in an embodiment of the present invention;

[0043] Figure 7 This is a schematic diagram of the emergency lever in an embodiment of the present invention;

[0044] Figure 8 This is a schematic diagram of the structure of the swinging component in an embodiment of the present invention;

[0045] Figure 9 This is a schematic diagram of the installation structure of the planar coil spring, rotating shaft, emergency lever, swing component, and swing rotating shaft in an embodiment of the present invention;

[0046] Figure 10 This is a partial cross-sectional view of the emergency reset module in an embodiment of the present invention;

[0047] Figure 11 This is a schematic diagram of the structure of the first limiting block, the second limiting block, and the swing rod disposed on the base in an embodiment of the present invention;

[0048] Figure 12 This is a schematic diagram of the installation structure of the swing module in an embodiment of the present invention;

[0049] Figure 13 This is a schematic diagram of the structure when the load is inserted into the optical path in an embodiment of the present invention;

[0050] Figure 14 This is a schematic diagram of the structure when the load cuts out the optical path in an embodiment of the present invention.

[0051] Explanation of reference numerals in the attached figures:

[0052] 1. Emergency Reset Module; 101. Pin Puller; 10101. Pin Puller Pin; 102. Reset Plate; 10201. Outer Pin Hole; 10202. Inner Pin Hole; 10203. Rotary Shaft Waist Hole; 103. Heat Insulation Trimming Pad; 104. Support Base; 10401. Observation Window; 10402. Spring Coil Interface; 10403. Stepped Hole; 105. Flat Spring Coil; 10501. Outer Interface; 10502. Inner Interface; 106. Top Cover Plate; 10601. Top Cover Plate Pin Hole; 107. Emergency Lever; 107 01. Lever and lever; 10702. Lever body; 108. First friction pad; 109. Second friction pad; 110. Shaft; 11002. Shaft groove; 111. Locking nut; 2. Swing module; 201. Load; 202. Swing shaft; 203. Base; 204. Swing movable rod; 205. Spacer; 206. Bearing; 207. Swing component; 20701. Swing plate; 20702. Swing body; 208. Bearing outer end cover; 209. First limiting block; 210. Second limiting block. Detailed Implementation

[0053] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0054] like Figure 1 As shown, an on-orbit emergency reset mechanism includes a base 203, an emergency reset module 1 disposed on one side wall of the base 203, and a first limiting block 209, a second limiting block 210, and a swing module 2 disposed on the other side wall of the base 203. The purpose of the emergency reset module 1 is to push the load 201 of the swing module 2 out of the main optical path and return it to its initial position to avoid blocking the optical path. The purpose of the swing module 2 is to cut the load 201 into or out of the main system optical path and perform specific functions. The emergency reset module 1 includes a puller 101, a reset disk 102, a support base 104 coaxially disposed with the reset disk 102, an emergency lever 107, a rotating shaft 110, an upper cover plate 106 located between the reset disk 102 and one end of the support base 104, a locking nut 111, and a first friction pad 108 disposed between the support base 104 and the emergency lever 107, and a second friction pad 109 disposed between the reset disk 102 and the upper cover plate 106. The pin puller 101 is provided with a pin puller pin 10101; the swing module 2 includes a swing movable rod 204, a swing rotating shaft 202, a bearing 206 and a swing component 207 coaxially arranged on the swing rotating shaft 202, and a bearing outer end cover 208 connected to one side wall of the base 203.

[0055] like Figure 2 As shown, the reset plate 102 has twelve external pin holes 10201, twelve internal pin holes 10202, and one shaft waist-shaped hole 10203 that matches one end of the rotating shaft 110, evenly distributed along its circumference. The number of external pin holes 10201 on the reset plate 102 can be finely adjusted according to the torque curve of the actual planar coil spring 105. The radial direction of the reset plate 102 is fixed by the waist-shaped hole at one end of the rotating shaft 110, and the axial direction is fixed by the locking nut 111. The circumference of the twelve external pin holes 10201 and the circumference of the twelve internal pin holes 10202 form concentric circles, and the internal pin holes 10202 and external pin holes 10201 correspond one-to-one radially and are in phase. Both ends of the inner pin hole 10202 and the outer pin hole 10201 of each set are chamfered. The chamfer can be a right angle (or a rounded corner) to facilitate the smooth entry and exit of the pin puller pin 10101 and the process pins. The outer pin hole 10201 has a radially oriented slot that mates with the pin puller pin 10101. The slot is 1mm long and has a width tolerance of +0.1mm, facilitating the adaptation to the position of the pin puller pin 10101 and serving a guiding function. The inner pin hole 10202 has a diameter tolerance of +0.02mm. This design minimizes the gap between the inner pin holes 10202 in the inner ring of the reset plate 102 and maximizes the gap between the outer pin holes 10201 in the outer ring. This design significantly reduces assembly difficulty and avoids introducing excessive installation stress into the pin puller 101.

[0056] like Figure 3 As shown, the pin puller 101 is electrically connected to an external device and is used to retract the pin puller pin 10101 when the emergency reset is powered on. The pin puller 101 is connected to the outer wall of the support base 104 by screws through the heat-insulating trimming pad 103. The pin puller pin 10101 can extend or retract along the pin axis into the outer pin hole 10201. In this embodiment, the pin puller 101 is a shape memory alloy pin puller that retracts when powered on. In other embodiments, it can also be an electromagnet pin puller, a pyrotechnic pin puller, or a locking device such as a release nut, a break-through device, or a hot knife. When the pin puller pin 10101 is pulled out, it connects to the reset plate 102, and the pin puller pin 10101 engages with the outer pin hole 10201, restricting the rotation of the emergency lever 107. The heat-insulating trimming pad 103 is made of fiberglass, but can also be made of polyimide. It can be used to adjust the position of the pin puller 101 and also to isolate heat from the pin puller 101, thus preventing the pin puller 101 from being accidentally triggered or malfunctioning due to exceeding the operating temperature range.

[0057] The upper cover plate 106 has twelve upper cover plate pin holes 10601 evenly distributed at positions corresponding to the twelve inner pin holes 10202. The twelve upper cover plate pin holes 10601 and the twelve inner pin holes 10202 are axially aligned and connected vertically, which facilitates the precise positioning of the process pins in the outer pin holes 10201 during installation, making the assembly work simpler and avoiding additional stress on the pins of the pin puller 101 when installing the pin puller 101. The upper cover plate 106 is coaxially connected to the reset plate 102 through the upper cover plate pin hole 10601 and twelve inner pin holes 10202. The outer side of the upper cover plate 106 away from the rotating shaft 110 is connected to one end of the support base 104 through a stop joint and screws, which is used to set the flat coil spring 105 between the upper cover plate 106 and the support base 104. The inner hole of the upper cover plate 106 and the support base 104 are coaxial, and the inner hole is engaged with the outer circle of the rotating shaft 110, with a clearance of 0.06mm.

[0058] like Figure 4 As shown, the side wall of the support base 104 is provided with an observation window 10401 and a spring coil interface 10402 at positions corresponding to the emergency lever 107 and the swing component 207. The support base 104 has an internal partition with a stepped hole 10403 adapted to the positioning step. The observation window 10401 is used to observe the status of the emergency lever 107 and the swing component 207. The spring coil interface 10402 is a straight, flat slot extending through one side, with rounded corners on both sides, used for connection to the external interface 10501. The stepped hole 10403 is used for radial and axial engagement with the other end of the rotating shaft 110 to prevent axial movement of the rotating shaft 110. In addition, the support base 104 is also designed with a threaded interface for fixing to the puller 101, a flange interface for fixing to the upper cover plate 106, and a flange interface for fixing to the base 203.

[0059] like Figure 3 , Figure 5 , Figure 6As shown, the rotating shaft 110 is rotatably mounted inside the support base 104, and a flat coil spring 105 is sleeved between the rotating shaft 110 and the support base 104. One end of the rotating shaft 110 passes through the upper cover plate 106 and the waist-shaped hole and is connected to the locking nut 111 in sequence, while the other end passes through the flat coil spring 105 and the partition of the support base 104 and is fixedly connected to the emergency lever 107. The rotating shaft 110 is provided with a through rotating shaft slot 11002 along the axial direction, which facilitates the installation of the flat coil spring 105. The rotating shaft slot 11002 has a certain curvature, which is consistent with the curvature of the flat coil spring 105, which can greatly reduce the installation stress of the flat coil spring 105 and reduce the risk of on-orbit failure. The inner interface 10502 of the planar coil spring 105 connects to the rotating shaft slot 11002, and the outer interface 10501 engages with the coil spring interface 10402. The curvature of the rotating shaft slot 11002 is consistent with the curvature of the inner interface 10502 to avoid excessive installation stress. The planar coil spring 105 is used to rotate the emergency lever 107 during emergency reset.

[0060] The swing shaft 202 is connected to the base 203 by a bearing 206. One end of the swing shaft 202 passes through the base 203 and is fixed to the swing member 207. One side of the swing shaft 202 is used to set the load 201. The swing movable rod 204 is connected to the other side of the swing shaft 202 and is set close to the base 203. It is used to swing between the first limit block 209 and the second limit block 210. The swing member 207 cooperates with the emergency lever 107 to push the swing member 207 to reset so that the load 201 cuts out of the optical path.

[0061] like Figure 7 As shown, the emergency lever 107 includes a lever body 10702 and a lever tab 10701 disposed on the side wall of the lever body 10702. The lever body 10702 is a cylindrical structure with a first blind hole adapted to the other end of the rotating shaft 110. The first blind hole is a regular dodecagon. To facilitate adjustment of the stored torque of the planar coil spring 105, the cross-section of the other end of the rotating shaft 110 is a regular dodecagon, and the regular dodecagon corresponds radially to twelve external pin holes 10201 and twelve internal pin holes 10202. The lever body 10702 and the rotating shaft 110 are radially connected by a regular dodecagonal stop and are axially fixed by screws. The lever body 10702 and the rotating shaft 110 have 12 positions when they are in contact with the stop, which ensures that the lever tab 10701 is always in the set position when the planar coil spring 105 stores different torque values.

[0062] like Figure 8 , Figure 9 , Figure 10As shown, the swing element 207 includes a swing body 20702 connected to one end of the swing shaft 202 and a swing piece 20701 disposed on the side wall of the swing body 20702. The swing body 20702 has a cylindrical structure, and a second blind hole is provided at the end away from the swing shaft 202. The swing piece 20701 has an L-shaped structure. The swing element 207 is an irregularly shaped part, which serves as an inner end cap to limit the axial movement of the inner ring of the bearing 206. On the other hand, its extended swing piece 20701 is positioned in front of the emergency lever 107, so that in an emergency, the lever and lever 10701 can push the swing piece 20701 back to the initial position. The emergency lever 107 has the characteristics of the swing element 207. The lever and lever 10701 and the swing piece 20701 are in the same radial position and are in a forward and backward position in the swing direction. The swing body 20702 is coaxially arranged with the lever body 10702; one end of the L-shaped structure of the swing piece 20701 is connected to the side wall of the swing body 20702, and the other end protrudes from the swing body 20702 along the axis, cooperating with the lever piece 10701.

[0063] like Figure 11 As shown, the swing rod 204 includes a movable section that is adapted to the swing shaft 202 and fixedly connected to a U-shaped frame; the U-shaped frame is fixedly connected to the swing shaft 202; the movable section is located between the first limiting block 209 and the second limiting block 210, and the sides of the first limiting block 209 and the second limiting block 210 that are close to each other form a reset angle with the connecting line of the central axis of the swing shaft 202 in the same radial plane, and the reset angle is 95 degrees. In other embodiments, the reset angle can also be other angles less than 360 degrees, such as 180 degrees. The swing module 2 is a rotary mechanism that performs a specific function, cutting the load 201 into or out of the optical path by swinging 95 degrees. When the load 201 is a blackbody radiating plate, the calibration function of medium and long-wave infrared is achieved by cutting into the blackbody. When the load 201 is a reflective glass, the optical path is deflected by cutting into the reflector. The first limiting block 209 and the second limiting block 210 are respectively set at two extreme positions of the base 203. Under normal operating conditions, the first limit block 209 and the second limit block 210 do not contact the swing rod 204. When the control system malfunctions, contact between the swing rod 204 and either the first limit block 209 or the second limit block 210 prevents the load 201 from exceeding its operating range. In an emergency, contact between the swing rod 204 and the first limit block 209 prevents the load 201 from exceeding its operating range and being damaged.

[0064] like Figure 12As shown, one end of the swing shaft 202 extending from the bearing 206 passes through the bearing outer end cover 208 and is coaxially fixed to the swing body 20702; a spacer 205 is provided between the swing shaft 202 and the base 203; the spacer 205 is located near the other side wall of the base 203 and is used to adjust the axial position of the bearing 206; the bearing outer end cover 208 is connected to the base 203 by screws and is used to limit the position of the outer ring of the bearing 206.

[0065] In this embodiment, the movable parts of the emergency reset module 1 are the reset disk 102, the planar coil spring 105, the emergency lever 107, the rotating shaft 110, and the locking nut 111; the fixed parts are the pull pin 101, the support base 104, and the upper cover plate 106. The inner circular holes of the support base 104 and the upper cover plate 106 form a rotational axis system with the rotating shaft 110, allowing the rotating shaft 110 to rotate around the central axis of the support base 104. The first friction pad 108 and the second friction pad 109 are both made of aerospace self-lubricating polytetrafluoroethylene, which reduces the sliding friction torque and avoids adhesion and seizing between the movable and fixed parts of the emergency reset module 1. The material of the rotating shaft 110 is different from that of the support base 104 and the upper cover plate 106. The rotating shaft 110 and the stepped hole 10403, the inner circular hole of the upper cover plate 106, and the planar coil spring 105 that contact it are all treated with anti-cold welding solid lubrication to avoid on-orbit vacuum cold welding.

[0066] like Figure 13 As shown, when the load 201 enters the optical path and is located in the middle of the optical path, in the working position, the swinging rod 204 is located near the second limit block 210, with a rotation angle difference of 1.5 degrees between the two. After the pin 10101 extends out, it is inserted into the outer pin hole 10201, restricting the rotation of the emergency lever 107 driven by the planar coil spring 105; at this time, the emergency reset module 1 is in the unreleased state. The swinging module 2 and the emergency reset module 1 are two independent modules and are not coupled.

[0067] like Figure 14As shown, when load 201 cuts out of the optical path, the emergency reset mechanism resets by 95 degrees and returns to its initial position. During normal operation, load 201 reaches this position via a drive source (not shown) in the swing module 2, cutting out the optical path. At this time, the swing rod 204 is near the first limit block 209, with a rotation angle difference of 1.5 degrees between them. However, when the swing module 2 malfunctions, the emergency reset module 1 needs to be released. At this time, the pull pin 101 is energized, and the pull pin 10101 retracts from the outer pin hole 10201. The flat coil spring 105 drives the emergency lever 107 to rotate, and the emergency lever 107 pushes the swing component 207 to rotate. Since the swing component 207, the swing shaft 202, and the load 201 are all connected by screws, during the release of the flat coil spring 105 to the free state, the load 201 is pushed back to its initial position until the swing rod 204 contacts the first limit block 209 and stops, at which point load 201 cuts out of the optical path.

[0068] The planar coil spring 105 has an adjustable stored torque. After an emergency reset, if the designed driving torque of the drive source is greater than the sum of the stored torque of the planar coil spring 105 and the friction torque, the load 201 can still be driven by the drive source to enter the optical path to achieve a specific function, ensuring that the number of emergency resets is ≥1. After storing sufficient torque, the planar coil spring 105 restricts the rotation of the emergency lever 107 by inserting the pin 10101 into the outer pin hole 10201. In this embodiment, both the inner interface 10502 and the outer interface 10501 of the planar coil spring 105 are fixed by arc-shaped slots. However, in other embodiments, they are fixed by screws or pins. The first friction pad 108 and the second friction pad 109 are both polytetrafluoroethylene pads with a thickness of 0.5 mm, used to reduce the frictional resistance torque between the fixed part and the moving part.

[0069] In this embodiment, the frictional torque is 50 Nm, and the stored torque of the planar coil spring 105 is 2000 Nm. The planar coil spring 105 has 12 positions per turn. If it is wound twice, the number of positions increases by 12, for a total of 24.

[0070] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present invention should be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An on-orbit emergency reset mechanism, characterized by: The in-orbit emergency reset mechanism comprises a base (203), an emergency reset module (1) arranged on one side wall of the base (203), a swing module (2) arranged on the other side wall of the base (203), a first limiting block (209) and a second limiting block (210); The emergency reset module (1) comprises a support seat (104), a rotating shaft (110) coaxially and rotatably arranged in the support seat (104), a pin extractor (101) connected to the outer wall of the support seat (104), a reset disc (102) connected to the end of the rotating shaft (110) away from the base (203), and an emergency lever (107) connected to the other end of the rotating shaft (110); The pin extractor (101) is provided with a pin extractor pin (10101), and the reset disc (102) is uniformly distributed with a plurality of outer pin holes (10201) matched with the pin extractor pin (10101) along the circumference; the pin extractor (101) is electrically connected with an external device, and is used for retracting the pin extractor pin (10101) when power is supplied in an emergency reset mode; The rotating shaft (110) and the support seat (104) are sleeved with a planar coil spring (105); the inner interface (10502) of the planar coil spring (105) is connected with the rotating shaft (110), the outer interface (10501) is clamped with the support seat (104), and the planar coil spring (105) is used for rotating the emergency lever (107) in an emergency reset mode; The swing module (2) comprises a swing rotating shaft (202), a swing movable rod (204) and a swing piece (207); the swing rotating shaft (202) is connected with the base (203) through a bearing (206), one end of the swing rotating shaft (202) penetrates through the base (203) and is fixedly connected with the swing piece (207), and one side of the swing rotating shaft (202) is used for arranging a load (201); the swing movable rod (204) is connected to the other side of the swing rotating shaft (202) and is arranged close to the base (203), and is used for swinging between the first limiting block (209) and the second limiting block (210) when the swing rotating shaft (202) rotates; The emergency lever (107) cooperates with the swing piece (207), and is used for pushing the swing piece (207) to reset so as to cut off the light path of the load (201) in an emergency reset mode.

2. The in-orbit emergency reset mechanism according to claim 1, wherein: The emergency lever (107) comprises a lever body (10702) and a lever tab (10701) arranged on the side wall of the lever body (10702); the lever body (10702) is a cylindrical structure, and is provided with a first blind hole matched with the other end of the rotating shaft (110); The swing piece (207) comprises a swing body (20702) connected to one end of the swing rotating shaft (202) and a swing tab (20701) arranged on the side wall of the swing body (20702); the swing body (20702) is a cylindrical structure, and is provided with a second blind hole at the end away from the swing rotating shaft (202); The swing tab (20701) is an L-shaped structure. The swing body (20702) is coaxially arranged with the lever body (10702); One end of the L-shaped structure of the swing piece (20701) is connected to the side wall of the swing body (20702), and the other end protrudes from the swing body (20702) in the axial direction and cooperates with the lever piece (10701).

3. The on-orbit emergency reset mechanism according to claim 2, wherein: A plurality of inner pin holes (10202) are arranged on the reset disc (102) in a circumferential direction; the circumferences of the plurality of inner pin holes (10202) and the plurality of outer pin holes (10201) form concentric circles, and the inner pin holes (10202) and the outer pin holes (10201) correspond to each other in the radial direction; The other end of the shaft (110) is a regular polygon in cross section, and the edges of the regular polygon correspond to the plurality of outer pin holes (10201) and the plurality of inner pin holes (10202) in the radial direction, for adjusting the storage torque of the planar coil spring (105); the first blind hole is correspondingly a regular polygon.

4. The on-orbit emergency reset mechanism according to claim 3, wherein: The emergency reset module (1) further comprises an upper cover plate (106) between the reset disc (102) and one end of the support seat (104), and a locking nut (111) for fixing the reset disc (102); One end of the shaft (110) passes through the upper cover plate (106), the reset disc (102) and the locking nut (111) in sequence and is connected; The upper cover plate (106) is coaxially connected with the reset disc (102) through the upper cover plate pin holes (10601) and the plurality of inner pin holes (10202), and the outer side of the upper cover plate (106) is connected with the support seat (104); the planar coil spring (105) is arranged between the upper cover plate (106) and the support seat (104); The support seat (104) is provided with an observation window (10401) on the side wall corresponding to the emergency lever (107) and the swing member (207).

5. The on-orbit emergency reset mechanism according to claim 4, wherein: The swing movable lever (204) comprises a U-shaped frame matched with the swing shaft (202) and a movable section fixed to the U-shaped frame; The U-shaped frame is fixed to the swing shaft (202); and the movable section is located between the first limiting block (209) and the second limiting block (210).

6. The on-orbit emergency reset mechanism according to claim 5, wherein: The swing module (2) further comprises a bearing outer end cover (208) connected to one side wall of the base (203); One end of the swing shaft (202) passes through the bearing outer end cover (208) and is coaxially fixed to the swing member (207); A spacer (205) is arranged between the swing shaft (202) and the base (203), and is arranged close to the other side wall of the base (203).

7. The on-orbit emergency reset mechanism according to claim 6, wherein: The emergency reset module (1) further comprises a first friction pad (108) arranged between the support seat (104) and the emergency lever (107), a second friction pad (109) arranged between the reset disc (102) and the upper cover plate (106), and a heat insulation cutting pad (103) arranged between the outer wall of the support seat (104) and the pin puller (101).

8. The on-orbit emergency reset mechanism according to claim 7, wherein: The rotating shaft (110) is provided with a rotating shaft notch (11002) in the axial direction; the side wall of the support seat (104) is provided with a coil spring interface (10402); the inner interface (10502) of the planar coil spring (105) is connected with the rotating shaft notch (11002), and the outer interface (10501) is connected with the coil spring interface (10402); The other end of the rotating shaft (110) is provided with a positioning step on the side wall; the inside of the support seat (104) is provided with a partition plate, and the partition plate is provided with a step hole (10403) matched with the positioning step; the other end of the rotating shaft (110) is rotatably connected with the support seat (104) through the step hole (10403).

9. The on-orbit emergency reset mechanism according to claim 8, wherein: The outer pin hole (10201) and the inner pin hole (10202) are both twelve, and the twelve outer pin holes (10201) are all waist-shaped grooves arranged in the radial direction, and the width of the waist-shaped groove is matched with the pin (10101) of the pin puller; The reset disc (102) is provided with a rotating shaft waist hole (10203) matched with one end of the rotating shaft (110), and one end of the rotating shaft (110) is connected with the locking nut (111) through the rotating shaft waist hole (10203); The cross section of the other end of the rotating shaft (110) is a regular dodecagon.

10. The on-orbit emergency reset mechanism according to any one of claims 1 to 8, wherein: The first limiting block (209) and the second limiting block (210) are respectively arranged on the same radial plane with the center axis of the swing rotating shaft (202), and the side close to each other forms a reset included angle, and the reset included angle is 95 degrees.

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