On-orbit emergency reset mechanism

Abstract

The invention particularly relates to an on-orbit emergency reset mechanism, and solves the technical problems that an on-orbit emergency scheme of an existing main optical system light path movement mechanism has more transmission links and higher complexity, the on-orbit reliability is reduced, a coil spring always participates in rotation of a rotating shaft, the coil spring and the rotating shaft are not decoupled, the driving torque of a motor is increased, and the failure risk of the coil spring is 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, a first limiting block and a second limiting block, wherein the swing module, the first limiting block and the second limiting block are arranged on the other side wall of the base; the emergency reset module comprises a supporting seat, a rotating shaft, a pin puller, a reset disc and an emergency deflector rod; the swinging module comprises a swinging rotating shaft, a swinging movable rod and a swinging piece; and the emergency deflector rod is matched with the swing part and is used for pushing the swing part to reset during emergency reset so that the load is cut out of the light path.

Description

Technical Field

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

[0002] For on-orbit optical payloads, motion mechanisms are designed to cut in and out of the optical path. When the optical payload is working normally, this type of motion mechanism does not cut into the main optical path and does not affect the imaging of the main optical path. When a specific function needs to be performed, such as inserting a calibration optical path, this type of motion mechanism drives the load to rotate or translate into the main optical path of the system through a driving source to perform a specific function. After the execution is completed, the driving source drives the load to cut out of the main optical path of the system.

[0003] The motion mechanism that needs to cut in and out of the main optical system optical path to perform specific functions may fail to cut out of the optical path and return to the initial position due to increased resistance, insufficient motor driving force, motor failure, control circuit failure, etc. At this time, the load is located at a certain position in the main optical path of the system, which will block the main optical path of the main optical system, resulting in the ground radiation of the remote sensing payload not being able to reach the detector, and the remote sensing camera is completely ineffective.

[0004] Traditional on-orbit emergency plans include: during the design, two or more sets of motors are used for driving, which serve as backup for each other. This emergency plan cannot solve failures caused by motor control failures, motor cable breakage, etc., and because the motor itself has a toothed torque, the driving resistance is increased. In addition, it will also cause a significant increase in costs. Chinese patent CN104932606A discloses "an emergency reset device for faults in satellite-borne calibration mechanisms", which utilizes the telescopic effect of memory alloy rods to disengage the gears in the calibration mechanism through a lever effect, so that the rotating shaft returns to its original position under the action of a coil spring. The above-mentioned emergency device has many transmission links and high complexity, which reduces the on-orbit reliability, and the coil spring is always involved in the rotation of the rotating shaft, and the two are not decoupled, which increases the risk of motor drive torque and coil spring failure. Summary of the invention

[0005] The purpose of the present invention is to solve the technical problems that the on-orbit emergency solution of the existing main optical system optical path motion mechanism has many transmission links and high complexity, which reduces the on-orbit reliability, and the coil spring is always involved in the rotation of the rotating shaft, and the two are not decoupled, which increases the motor driving torque and the risk of coil spring failure, and provides an on-orbit emergency reset mechanism.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] An on-track emergency reset mechanism, which is special in that it 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 limit block and a second limit block;

[0008] The emergency reset module includes a support seat, a rotating shaft coaxially rotatably arranged in the support seat, a pin puller connected to the outer wall of the support seat, a reset disk connected to one 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 provided with a pin puller pin, and the reset disk is evenly distributed along the circumference with a plurality of external pin holes that cooperate with the pin puller pin; the pin puller is electrically connected to an external device and is used to retract the pin puller pin when power is turned on for emergency reset;

[0010] A flat coil spring is sleeved between the rotating shaft and the support seat; the inner interface of the flat coil spring is connected to the rotating shaft, and the outer interface is clamped with the support seat. 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 movable rod, and a swing member; the swing shaft is connected to the base through a bearing, one end of the swing shaft passes through the base and is fixedly connected to the swing member, and one side of the swing shaft is used to set a load; the swing movable rod is connected to the other side of the swing shaft and is arranged close to the base, and is used for swinging the swing movable rod between the first limit block and the second limit block when the swing shaft rotates;

[0012] The emergency lever cooperates with the swing member and is used to push the swing member to reset during emergency reset so that the load cuts out of the light path.

[0013] Furthermore, the emergency lever comprises a lever body and a lever paddle arranged on the side wall of the lever body; the lever body is a cylindrical structure, and a first blind hole adapted to the other end of the rotating shaft is arranged thereon;

[0014] The swing member includes a swing body connected to one end of the swing shaft and a swing sheet arranged on the side wall of the swing body; the swing body is a cylindrical structure, and a second blind hole is arranged at one end away from the swing shaft;

[0015] The swing piece is an L-shaped structure; the swing body and the lever body are coaxially arranged; one end of the L-shaped structure of the swing piece is connected to the side wall of the swing body, and the other end protrudes axially from the swing body to cooperate with the lever paddle.

[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 forms concentric circles with the circumference where the plurality of outer pin holes are located, and the inner pin holes correspond to the outer pin holes one by one along the radial direction;

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

[0018] Furthermore, the emergency reset module further comprises an upper cover plate located between the reset disk and one end of the support seat and a locking nut for fixing the reset disk;

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

[0020] A plurality of upper cover plate pin holes are arranged on the upper cover plate at positions corresponding to the plurality of inner pin holes. The upper cover plate is coaxially connected to the reset disk through the upper cover plate pin holes and the plurality of inner pin holes. The outer side of the upper cover plate is connected to the support seat. The plane coil spring is arranged between the upper cover plate and the support seat.

[0021] An observation window is arranged on the side wall of the support seat at a position corresponding to the emergency lever and the swinging member.

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

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

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

[0025] Furthermore, the rotating shaft is provided with a rotating shaft notch along the axial direction; a coil spring interface is provided on the side wall of the support seat; the inner interface of the planar coil spring is connected with the rotating shaft notch, and the outer interface is clamped with the coil spring interface;

[0026] A positioning step is arranged on the side wall at the other end of the rotating shaft; a partition is arranged inside the supporting seat, and a step hole matching the positioning step is arranged on the partition; the other end of the rotating shaft is rotatably connected to the supporting seat through the step hole.

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

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

[0029] Beneficial effects of the present invention:

[0030] (1) The on-orbit emergency reset mechanism of the present invention can reset the load that cuts into the optical path to the initial position, avoiding blocking the optical path and causing the main optical system to be completely blinded, thereby improving the reliability of the on-orbit remote sensing payload.

[0031] (2) The on-track emergency reset mechanism of the present invention has the advantages of not increasing extra power consumption, large storage torque, not affecting the normal operation of the main mechanism, and being able to perform no less than one emergency operation. It is only powered on and reset when an abnormality occurs on the track and cannot be resolved.

[0032] (3) The present invention provides an on-track emergency reset mechanism, which solves the problem of blocking the main light path when the motion mechanism performing a specific function on-track is abnormal. When the motion mechanism performing a specific function works normally, the emergency reset mechanism does not participate in the work (i.e., does not participate in the rotation of the load), and no coupling occurs. It is only executed when the load position is abnormal, thereby reducing the complexity of the system.

[0033] (4) The on-orbit emergency reset mechanism of the present invention has no long-term energized components and does not occupy satellite power consumption. It is energized only in an emergency, during which time the satellite's main functional components are not working. Therefore, its temporary power consumption is much lower than the satellite's peak power consumption.

[0034] (5) The present invention provides an on-track 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 larger than the friction torque.

[0035] (6) The present invention provides an on-orbit emergency reset mechanism that can perform ≥1 emergency operations. When the driving source torque is greater than the sum of the storage torque and the friction torque of the planar coil spring design, the load can be driven to rotate while driving the planar coil spring in the emergency reset to rotate, thereby ensuring that after the first emergency operation, the load can still cut into the optical path to perform a specific function.

[0036] (7) The on-rail emergency reset mechanism of the present invention can replace the planar coil spring with a tension spring, or a compression spring, and after adaptively modifying the protected mechanism, the on-rail emergency reset mechanism of the present invention can be applied from the field of rotary mechanisms to the field of linear motion. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a structural schematic diagram of an embodiment of an on-track emergency reset mechanism of the present invention;

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

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

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

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

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

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

[0044] Figure 8 is a schematic structural diagram of a swinging member in an embodiment of the present invention;

[0045] Fig. 9 It is a schematic diagram of the installation structure of the flat coil spring, the rotating shaft, the emergency lever, the swinging member and the swing rotating shaft in the embodiment of the present invention;

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

[0047] Fig.11 It is a structural schematic diagram of a first limit block, a second limit block and a swing movable rod arranged on a base in an embodiment of the present invention;

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

[0049] Fig.13 is a schematic diagram of the structure when a load is cut into the optical path in an embodiment of the present invention;

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

[0051] Description of reference numerals:

[0052] 1. Emergency reset module; 101. Pin puller; 10101. Pin puller pin; 102. Reset plate; 10201. External pin hole; 10202. Internal pin hole; 10203. Shaft waist hole; 103. Heat insulation trimming pad; 104. Support seat; 10401. Observation window; 10402. Coil spring interface; 10403. Step hole; 105. Plane coil spring; 10501. External interface; 10502. Internal interface; 106. Upper cover; 10601. Upper cover pin hole; 107. Emergency lever; 107 01. lever paddle; 10702. lever body; 108. first friction pad; 109. second friction pad; 110. shaft; 11002. shaft slot; 111. locking nut; 2. swing module; 201. load; 202. swing shaft; 203. base; 204. swing movable rod; 205. spacer; 206. bearing; 207. swing member; 20701. swing piece; 20702. swing body; 208. outer end cover of bearing; 209. first limit block; 210. second limit block. DETAILED DESCRIPTION

[0053] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0054] like Figure 1 As shown, an on-track emergency reset mechanism includes a base 203, an emergency reset module 1 arranged on one side wall of the base 203, and a first limit block 209, a second limit block 210 and a swing module 2 arranged on the other side wall of the base 203; the emergency reset module 1 is used to push the load 201 of the swing module 2 out of the main optical path and return to the initial position to avoid blocking the optical path. The swing module 2 is used 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 pin puller 101, a reset disk 102, a support seat 104 coaxially arranged 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 seat 104, a locking nut 111, a first friction pad 108 arranged between the support seat 104 and the emergency lever 107, and a second friction pad 109 arranged 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 shaft 202 , a bearing 206 and a swing member 207 coaxially arranged on the swing shaft 202 , and a bearing outer end cover 208 connected to a side wall of the base 203 .

[0055] like Figure 2 As shown, twelve outer pin holes 10201, twelve inner pin holes 10202 and a shaft waist hole 10203 matched with one end of the shaft 110 are uniformly distributed on the reset disk 102 along the circumference; the number of outer pin holes 10201 on the reset disk 102 can be finely adjusted according to the torque curve of the actual plane coil spring 105. The reset disk 102 is fixed radially by the waist hole at one end of the shaft 110, and axially by the locking nut 111; the circumference where the twelve outer pin holes 10201 are located forms a concentric circle with the circumference where the twelve inner pin holes 10202 are located, and the inner pin holes 10202 correspond to the outer pin holes 10201 one by one in the radial direction, and the phases are consistent. Both end faces of each group of inner pin holes 10202 and outer pin holes 10201 are chamfered, and the chamfers can be chamfered at right angles (or rounded corners) to facilitate the smooth entry or exit of the pin puller pin 10101 and the smooth entry and exit of the process pins. Among them, the outer pin hole 10201 is a waist-shaped groove that matches the pin puller pin 10101 in the radial direction. The waist-shaped groove length is 1mm, and the waist-shaped groove width tolerance is +0.1mm, which is convenient for adapting to the position of the pin puller pin 10101 and plays a guiding role; the diameter tolerance of the inner pin hole 10202 is +0.02mm, that is, the gap between the inner pin holes 10202 of the inner circle of the reset disk 102 is small, and the gap between the outer pin holes 10201 of the outer circle is large. This design can greatly reduce the difficulty of assembly operation and avoid introducing large installation stress to 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 power is turned on for emergency reset; the pin puller 101 is connected to the outer wall of the support seat 104 by screws through the heat-insulating trimming pad 103; the pin puller pin 10101 can extend or retract into the outer pin hole 10201 along the pin axis. In this embodiment, the pin puller 101 is a memory alloy pin puller that retracts when power is turned on. In other embodiments, it can also be an electromagnet pin puller, a pyrotechnic pin puller, and a locking device such as a separating nut, a tensioner, and a hot knife. When the pin puller pin 10101 is pulled out, the reset disk 102 is connected through the pin puller pin 10101, and the pin puller pin 10101 cooperates with the outer pin hole 10201 to limit the rotation of the emergency lever 107. The heat-insulating trimming pad 103 is made of glass fiber reinforced plastic or polyimide material, which can adjust the position of the pin puller 101 and isolate the heat from the pin puller 101, thereby preventing the pin puller 101 from being triggered or failing due to exceeding the operating temperature range.

[0057] Twelve upper cover pin holes 10601 are evenly distributed on the upper cover 106 at positions corresponding to the twelve inner pin holes 10202. The twelve upper cover pin holes 10601 correspond one-to-one with the twelve inner pin holes 10202 along the axial direction and are connected from top to bottom, which is convenient for installing process pins to accurately position the outer pin holes 10201, 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 disk 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 matched with one end of the support seat 104 through a stopper and connected with screws, which is used to set the flat coil spring 105 between the upper cover plate 106 and the support seat 104; the upper cover plate 106 is coaxial with the inner circular hole of the support seat 104, and the inner circular hole is matched with the outer circle of the rotating shaft 110, and the matching clearance is 0.06mm.

[0058] like Figure 4 As shown, an observation window 10401 and a coil spring interface 10402 are provided at positions corresponding to the emergency lever 107 and the swing member 207 on the side wall of the support seat 104, and a partition is provided inside the support seat 104, and a step hole 10403 matching the positioning step is provided on the partition. The observation window 10401 is used to observe the status of the emergency lever 107 and the swing member 207; the coil spring interface 10402 is a flat straight slot that passes through one side, and the side edges are all chamfered for connection with the external interface 10501. The step hole 10403 is used to cooperate with the other end of the rotating shaft 110 in the radial and axial direction to prevent the rotating shaft 110 from moving axially. In addition, the support seat 104 is also designed with a threaded interface fixed to the pin puller 101, a flange interface fixed to the upper cover plate 106, and a flange interface fixed to the base 203.

[0059] like Figure 3 , Figure 5 , Figure 6As shown, the rotating shaft 110 can be rotatably arranged in the support seat 104, and a flat coil spring 105 is sleeved between the rotating shaft 110 and the support seat 104; one end of the rotating shaft 110 passes through the upper cover plate 106, the waist-shaped hole and is connected to the locking nut 111 in sequence, and the other end passes through the flat coil spring 105, the support seat 104 partition and is fixedly connected to the emergency lever 107; the rotating shaft 110 is axially provided with a through rotating shaft slot 11002 to facilitate the installation of the flat coil spring 105, and the rotating shaft slot 11002 has a certain curvature, which is consistent with the flat coil spring 105, which can greatly reduce the installation stress of the flat coil spring 105 and reduce the risk of on-track failure. The inner interface 10502 of the planar coil spring 105 is connected to the shaft slot 11002, and the outer interface 10501 is clamped with the coil spring interface 10402. The curvature of the shaft slot 11002 is consistent with the curvature of the inner interface 10502, avoiding excessive installation stress. The planar coil spring 105 is used to drive the emergency lever 107 to rotate during emergency reset.

[0060] The swing shaft 202 is connected to the base 203 via a bearing 206, one end of the swing shaft 202 passes through the base 203 and is fixedly connected to the swing member 207, and 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, and 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 paddle 10701 disposed on the side wall of the lever body 10702; the lever body 10702 is a cylindrical structure, on which a first blind hole matching the other end of the rotating shaft 110 is disposed, and the first blind hole is a regular dodecagon; in order to facilitate the adjustment of the stored torque of the plane coil spring 105, the cross section of the other end of the rotating shaft 110 is a regular dodecagon, and the regular dodecagon corresponds to the twelve outer pin holes 10201 and the twelve inner pin holes 10202 in a radial direction. The lever body 10702 and the rotating shaft 110 are matched through the regular dodecagon stopper to be radially connected, and are fixed axially by screws. The lever body 10702 matches the stopper of the rotating shaft 110, and there are 12 positions, which can ensure that when the plane coil spring 105 stores different torque values, the lever paddle 10701 is always located at the set position.

[0062] like Figure 8 , Fig. 9 , Fig.10As shown, the swing member 207 includes a swing body 20702 connected to one end of the swing shaft 202 and a swing piece 20701 arranged on the side wall of the swing body 20702; the swing body 20702 is a cylindrical structure, and a second blind hole is arranged at one end thereof away from the swing shaft 202; the swing piece 20701 is an L-shaped structure; the swing member 207 is a special-shaped member, which, on the one hand, acts as an inner end cover to limit the axial movement of the inner ring of the bearing 206, and on the other hand, the swing piece 20701 extending out is placed in front of the emergency lever 107, so that the lever paddle 10701 can push the swing piece 20701 back to the initial position in an emergency state. The emergency lever 107 has the characteristics of the swing member 207, and the lever paddle 10701 and the swing piece 20701 are both in the same radial position and in front and back positions in the swinging 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 axially from the swing body 20702 to cooperate with the lever paddle 10701 .

[0063] like Fig.11 As shown, the swing movable rod 204 includes a U-shaped frame adapted to the swing shaft 202 and an active section fixedly connected to the U-shaped frame; the U-shaped frame is fixedly connected to the swing shaft 202; the active section is located between the first limit block 209 and the second limit block 210, and the first limit block 209 and the second limit block 210 are close to each other. The side connecting the central axis of the swing shaft 202 on the same radial plane forms a reset angle, 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, and the load 201 is cut into or out of the optical path by a 95-degree swing. When the load 201 is a black body radiation plate, the calibration function of the medium and long wave infrared is realized by cutting into the black body. When the load 201 is a reflector glass, the folding of the optical path is realized by cutting into the reflector. The first limit block 209 and the second limit block 210 are respectively arranged at two extreme positions of the base 203. In normal working state, the first limit block 209 and the second limit block 210 do not contact the swing movable rod 204. When the control system is abnormal, the swing movable rod 204 contacts the first limit block 209 or the second limit block 210 to prevent the load 201 from exceeding the working range. In emergency, the swing movable rod 204 contacts the first limit block 209 to prevent the load 201 from exceeding the working range and being damaged.

[0064] like Fig.12As shown, one end of the swing shaft 202 extends out of the bearing 206 and passes through the outer end cover 208 of the bearing and is coaxially fixed to the swing body 20702; a spacer ring 205 is arranged between the swing shaft 202 and the base 203; the spacer ring 205 is arranged close to the other side wall of the base 203, and is used to adjust the axial position of the bearing 206. The outer end cover 208 of the bearing is connected to the base 203 by screws, which 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 flat coil spring 105, the emergency lever 107, the rotating shaft 110 and the locking nut 111; the fixed parts are the pin puller 101, the support seat 104 and the upper cover plate 106. The inner circular hole of the support seat 104, the inner circular hole of the upper cover plate 106 and the rotating shaft 110 form a rotary shaft system, so that the rotating shaft 110 can rotate around the central axis of the support seat 104. The first friction pad 108 and the second friction pad 109 are both aerospace self-lubricating material polytetrafluoroethylene, which reduces the sliding friction torque and avoids the adhesion and bite of the movable part and the fixed part of the emergency reset module 1. The material of the rotating shaft 110 is different from that of the support seat 104 and the upper cover plate 106. The rotating shaft 110 and the step hole 10403, the inner circular hole of the upper cover plate 106 and the flat coil spring 105 in contact with it are all treated with anti-cold welding solid lubrication to avoid vacuum cold welding on track.

[0066] like Fig.13 As shown, when the load 201 cuts into the optical path and is located in the middle of the optical path and is in the working position, the swing movable rod 204 is located near the second limit block 210, and the two are in contact with each other at a rotation angle of 1.5 degrees. The pin puller pin 10101 is extended and inserted into the outer pin hole 10201, which limits the plane coil spring 105 from driving the emergency lever 107 to rotate; at this time, the emergency reset module 1 is in an unreleased state. The swing module 2 and the emergency reset module 1 are two independent modules and are not coupled.

[0067] like Fig.14As shown, when the load 201 cuts out of the optical path, the emergency reset mechanism is reset 95 degrees and is in the initial position. During normal operation, the load 201 reaches this position by being driven by the driving source (not shown) in the swing module 2, and cuts out the optical path. At this time, the swing movable rod 204 is located near the first limit block 209, and the two are 1.5 degrees away from each other. However, when the swing module 2 works abnormally, the emergency reset module 1 needs to be released. At this time, the pin puller 101 is powered on, and the pin puller pin 10101 retracts from the outer pin hole 10201. The plane coil spring 105 drives the emergency lever 107 to rotate, and the emergency lever 107 pushes the swing member 207 to rotate. Since the swing member 207, the swing shaft 202 and the load 201 are all connected by screws, the plane coil spring 105 is released to the free state, and the load 201 is pushed back to the initial position until the swing movable rod 204 stops after contacting the first limit block 209, and the load 201 cuts out of the optical path.

[0068] The stored torque of the planar coil spring 105 is adjustable. After emergency resetting, if the designed driving source driving torque is greater than the sum of the stored torque of the planar coil spring 105 and the friction torque, the driving source can still drive the load 201 to cut into the optical path to achieve a specific function, so that the number of emergency times is ≥ 1. After storing enough torque, the planar coil spring 105 limits the rotation of the emergency lever 107 by inserting the pin 10101 of the pin puller into the outer pin hole 10201. In this embodiment, the inner interface 10502 and the outer interface 10501 of the planar coil spring 105 are fixed by notches with arcs, but 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, which are used to reduce the friction resistance torque between the fixed part and the movable part.

[0069] In this embodiment, the friction torque is 50 Nm, and the storage torque of the planar coil spring 105 is 2000 Nm. The planar coil spring 105 has 12 gears for each winding. If it is wound 2 times, the gears of the planar coil spring 105 increase by 12, for a total of 24.

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

Claims

1. An on-orbit emergency reset mechanism, characterized in that: It 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 limit block (209) and a second limit block (210); The emergency reset module (1) comprises a support seat (104), a rotating shaft (110) coaxially rotatably arranged in the support seat (104), a pin puller (101) connected to the outer wall of the support seat (104), a reset disk (102) connected to one 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 puller (101) is provided with a pin puller pin (10101), and the reset disk (102) is evenly distributed along the circumference with a plurality of external pin holes (10201) that cooperate with the pin puller pin (10101); the pin puller (101) is electrically connected to an external device and is used to retract the pin puller pin (10101) when power is turned on for emergency reset; A planar coil spring (105) is sleeved between the rotating shaft (110) and the support seat (104); the inner interface (10502) of the planar coil spring (105) is connected to the rotating shaft (110), and the outer interface (10501) is clamped to the support seat (104); the planar coil spring (105) is used to drive the emergency lever (107) to rotate during emergency reset; The swing module (2) comprises a swing shaft (202), a swing movable rod (204), and a swing member (207); the swing shaft (202) is connected to the base (203) via a bearing (206); one end of the swing shaft (202) passes through the base (203) and is fixedly connected to the swing member (207); one side of the swing shaft (202) is used to set a load (201); the swing movable rod (204) is connected to the other side of the swing shaft (202) and is arranged close to the base (203), and is used for swinging the swing movable rod (204) between a first limit block (209) and a second limit block (210) when the swing shaft (202) rotates; The emergency lever (107) cooperates with the swing member (207) and is used to push the swing member (207) to reset during emergency reset so that the load (201) cuts out of the optical path.

2. According to claim 1, an on-track emergency reset mechanism is characterized in that: The emergency lever (107) comprises a lever body (10702) and a lever paddle (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 adapted to the other end of the rotating shaft (110); The swing member (207) comprises a swing body (20702) connected to one end of the swing shaft (202) and a swing sheet (20701) arranged on the side wall of the swing body (20702); the swing body (20702) is a cylindrical structure, and a second blind hole is arranged at one end away from the swing shaft (202); The swing plate (20701) is an L-shaped structure; The swing body (20702) and the lever body (10702) are coaxially arranged; One end of the L-shaped structure of the swing plate (20701) is connected to the side wall of the swing body (20702), and the other end protrudes axially from the swing body (20702) to cooperate with the lever paddle (10701).

3. According to claim 2, an on-track emergency reset mechanism is characterized in that: The reset disk (102) is provided with a plurality of inner pin holes (10202) along the circumference thereof; the circumference where the plurality of inner pin holes (10202) are located and the circumference where the plurality of outer pin holes (10201) are located form concentric circles, and the inner pin holes (10202) correspond to the outer pin holes (10201) one by one in the radial direction; The cross-section of the other end of the rotating shaft (110) is a regular polygon, and the sides of the regular polygon correspond to the multiple outer pin holes (10201) and the multiple inner pin holes (10202) in a radial direction, so as to adjust the storage torque of the planar coil spring (105); the first blind hole is correspondingly set to a regular polygon.

4. According to claim 3, an on-track emergency reset mechanism is characterized in that: The emergency reset module (1) further comprises an upper cover plate (106) located between the reset disk (102) and one end of the support seat (104), and a locking nut (111) for fixing the reset disk (102); One end of the rotating shaft (110) passes through the upper cover plate (106), the reset plate (102) and is connected to the locking nut (111) in sequence; A plurality of upper cover plate pin holes (10601) are arranged on the upper cover plate (106) at positions corresponding to the plurality of inner pin holes (10202); the upper cover plate (106) is coaxially connected to the reset disk (102) via the upper cover plate pin holes (10601) and the plurality of inner pin holes (10202); the outer side of the upper cover plate (106) is connected to the support seat (104); and the planar coil spring (105) is arranged between the upper cover plate (106) and the support seat (104); An observation window (10401) is provided on the side wall of the support seat (104) at a position corresponding to the emergency lever (107) and the swing member (207).

5. The on-track emergency reset mechanism according to claim 4, characterized in that: The swing movable rod (204) comprises a U-shaped frame adapted to the swing rotating shaft (202) and a movable section fixedly connected to the U-shaped frame; The U-shaped frame is fixedly connected to the swing shaft (202); and the movable section is located between the first limit block (209) and the second limit block (210).

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

7. The on-track emergency reset mechanism according to claim 6, characterized in that: 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 disk (102) and the upper cover plate (106), and a heat-insulating trimming pad (103) arranged between the outer wall of the support seat (104) and the pin puller (101).

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

9. The on-track emergency reset mechanism according to claim 8, characterized in that: There are twelve outer pin holes (10201) and twelve inner pin holes (10202), and the twelve outer pin holes (10201) are waist-shaped grooves arranged along the radial direction, and the width of the waist-shaped grooves is adapted to the pin of the pin puller (10101); The reset disk (102) is provided with a shaft waist-shaped hole (10203) adapted to one end of the shaft (110); one end of the shaft (110) passes through the shaft waist-shaped hole (10203) and is connected to the locking nut (111); The cross section of the other end of the rotating shaft (110) and the first blind hole are both regular dodecagons.

10. An on-track emergency reset mechanism according to any one of claims 1 to 8, characterized in that: The lines connecting the sides of the first limit block (209) and the second limit block (210) that are close to each other and the central axis of the swing shaft (202) in the same radial plane form a reset angle of 95 degrees.

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