Non-pyrotechnic secondary satellite and rocket locking and separating device

Abstract

The invention relates to a non-pyrotechnic secondary satellite and rocket locking and separating device which comprises a shape memory alloy primary separating assembly, a pressing and releasing assembly and a turntable four-claw secondary clamping and separating assembly, and the shape memory alloy primary separating assembly is arranged in a box body of the pressing and releasing assembly; one end, extending out of the shell, of a grooving bolt shaft of the shape memory alloy first-stage separation assembly penetrates through a through hole of the separation block to be connected with a nut, and the shape memory alloy rod provides driving force for the shape memory alloy first-stage separation assembly to jointly form a first-stage unlocking mechanism; a clamping jaw guide groove of the rotary table four-jaw two-stage clamping and separating assembly is fixed to the bottom plate, a rotary table controls a clamping jaw set to be locked, and clamping jaws are connected with a separating block of the pressing and releasing assembly to jointly form a two-stage unlocking mechanism. When the device is locked, after being locked by the shape memory alloy first-stage separation assembly, the device is locked by the turntable four-claw second-stage clamping separation assembly; when the device is separated, the device is unlocked by the turntable four-claw secondary clamping and separating assembly, and then is unlocked by the shape memory alloy primary separating assembly.

Description

Technical Field

[0001] The invention relates to an aerospace satellite-rocket locking and separating device, in particular to a non-pyrotechnic, two-stage satellite-rocket locking and separating device. Background Art

[0002] The rocket-satellite separation device is used to separate the rocket from the satellite during space launch. At present, the separation device is divided into two types: pyrotechnic release and non-pyrotechnic release. The pyrotechnic release has a particularly large impact, which poses a safety hazard, pollutes the environment, and cannot be tested and used repeatedly. Unlike the traditional pyrotechnic separation device, the non-pyrotechnic, two-stage rocket-satellite locking separation device has the advantages of reducing impact, alleviating the burden on the ignition system, eliminating safety protection issues, and ensuring the reliability of the device. Therefore, only the non-pyrotechnic, two-stage rocket-satellite locking separation device is allowed to undergo full flight environment testing and full-function inspection.

[0003] With the widespread popularity of satellite applications and the continuous increase in space missions, the requirements for separation mechanisms are becoming higher and higher. For example, the separation mechanism is required to have higher reliability, more precise control, and lighter design to meet the needs of different types of satellites and improve the performance and efficiency of the overall space system.

[0004] Although the traditional pyrotechnic separation mechanism can achieve the expected effect, it has the following significant defects: large separation shock, poor safety, non-repeatability, etc. Therefore, it is necessary to develop non-pyrotechnic, low-impact connection and separation devices for advanced space launch missions. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a non-pyrotechnic two-stage satellite-rocket locking and separation device, which can realize non-pyrotechnic unlocking and separation of satellites and spacecraft, and improve the problems of poor satellite separation posture and low satellite separation reliability.

[0006] To achieve the above-mentioned purpose, the technical solution of the present invention is: a non-pyrotechnic two-stage star-rocket locking and separation device, comprising: a shape memory alloy first-stage separation component, a clamping and releasing component, a turntable four-claw second-stage clamping and separating component, a pressure plate, and a base plate, the box body of the clamping and releasing component is fixed on the base plate, and the shape memory alloy first-stage separation component is installed inside; the slotted bolt shaft of the shape memory alloy first-stage separation component extends out of one end of the shell body and passes through the through hole of the separation block to be connected with the nut, and the shape memory alloy first-stage separation component is provided with driving force by the shape memory alloy rod, and together constitutes a first-stage unlocking mechanism; the claw guide groove of the turntable four-claw second-stage clamping and separating component is fixed on the base plate, the turntable controls the locking of the claw group, and the claw connects the separation block of the clamping and releasing component, and together constitutes a second-stage unlocking mechanism; when the device is locked, it is first locked by the shape memory alloy first-stage separation component, and then locked by the turntable four-claw second-stage clamping and separating component; when the device is separated, it is first unlocked by the turntable four-claw second-stage clamping and separating component, and then unlocked by the shape memory alloy first-stage separation component.

[0007] Furthermore, the shape memory alloy primary separation component is located inside the box body in the compression release component, the shape memory alloy primary separation component and the box body are fastened and connected via through hole group III and through hole group V bolts, and the upper part of the slotted bolt shaft in the shape memory alloy primary separation component passes through through hole III in the separation block and is connected to the nut.

[0008] Furthermore, there are four sets of clamping and releasing components which are evenly distributed on the upper part of the bottom plate and are fastened and connected via bolts of through hole group IV and through hole group V. The inclined groove of the separation block in the clamping and releasing components is clamped by the inclined surface in the secondary clamping and separating components of the four claws of the turntable.

[0009] Furthermore, the turntable four-claw secondary clamping and separation assembly is located between the pressure plate and the base plate, and the boss of the turntable and the through hole I in the pressure plate are clearance-matched; the clamping claw guide groove and the base plate in the turntable four-claw secondary clamping and separation assembly are fastened and connected via countersunk hole group I and countersunk hole group IV bolts; the pressure plate and the base plate are fastened and connected via through hole group I and through hole group VI bolts.

[0010] Furthermore, the shape memory alloy primary separation component includes a shell, a base, a slotted bolt shaft, a spring II, a sleeve, a spring III, a slider, a steel ball, a shape memory alloy rod and a power cable; the through hole V on the upper part of the shell passes through the slotted bolt shaft, and the internal thread of the shell is fastened with the external thread I of the base; the shoulder I of the slotted bolt shaft is movably connected to the limiting part I of the shell; the spherical concave surface of the slotted bolt shaft is movably connected to the steel ball; the upper part of the spring II is installed in the groove I of the shell, and the lower part is movably connected to the shoulder II of the slotted bolt shaft; there is a square hole in the middle of the sleeve, and the steel ball Located in the square hole; there are two limit blocks evenly distributed on the horizontal plane in the limit block group of the sleeve, and the two limit blocks are located in the guide groove group III of the slotted bolt shaft; the upper part of the spring III is movably connected to the hole VI of the sleeve, and the lower part is movably connected to the hole VII of the slider; the slider is located in the sleeve, and the lower part is located in the hole III of the base and is movably connected to the shape memory alloy rod; one side of the steel ball is movably connected to the slotted bolt shaft, and the other side is movably connected to the slider; the shape memory alloy rod is located in the hole IV of the base, and the bottom is connected to the power cable; the power cable is connected to the external power supply through the hole V of the base.

[0011] Furthermore, the compression and release assembly includes a separation block, a housing, a spring I and a side plate. The through hole group III of the separation block has four through holes evenly distributed on the same horizontal end surface, which are connected to the satellite through threads; the spring I is located in the cylinder of the housing, the column on the separation block is located in the spring I, and continues to extend downward into the hole II of the housing; the countersunk hole group II on the side plate has a total of six countersunk holes arranged on both sides of the side plate, which are fastened to the threaded hole group of the housing through screws; the through hole IV in the side plate is movably connected to the base boss in the shape memory alloy primary separation assembly; the through hole group II in the housing is fastened to the through hole group V in the shell of the shape memory alloy primary separation assembly through bolts, the slotted bolt shaft in the shape memory alloy primary separation assembly passes through the through hole III of the separation block, and a hexagonal flange nut is installed on the top of the slotted bolt shaft.

[0012] Furthermore, the turntable four-claw two-stage clamping and separation assembly consists of a claw guide groove, a claw group, a bearing, a motor and a turntable; the claw guide groove has four "T"-shaped guide grooves evenly distributed on the horizontal plane, and the four claws in the claw group are respectively installed in the "T"-shaped grooves; the guide rod in the claw is simultaneously located in the guide groove group I of the claw guide groove and the guide groove group II of the turntable; the bearing is located in the groove I of the claw guide groove, and is an interference fit with the groove I and the shaft neck of the turntable; the motor is located inside the claw guide groove, and the rotating shaft of the motor and the hole I of the turntable are connected by a pin.

[0013] Furthermore, the through hole Ⅰ of the pressure plate and the boss clearance of the turntable of the four-claw two-level clamping and separation assembly of the turntable are matched, and the matching clearance is S, and the value range of S is 0.2-0.3mm, which can ensure the neutrality of the turntable movement and does not hinder the rotation of the turntable; the pressure plate is provided with a weight reduction structure group Ⅰ and a weight reduction structure group Ⅱ, the weight reduction structure group Ⅰ includes four round head slot holes evenly distributed on the same circumference, and the weight reduction structure group Ⅱ includes four round head slot holes evenly distributed in the horizontal plane; the pressure plate is installed on the top of the four-claw two-level clamping and separation assembly of the turntable, and the through hole group Ⅰ of the pressure plate is fastened to the through hole group Ⅵ of the bottom plate by bolts.

[0014] Furthermore, the countersunk hole group III of the base plate is fastened to the rocket; a lattice structure group, a weight reduction structure group V and a weight reduction structure group VI are provided on the base plate; the lattice structure group includes four parts evenly distributed on the horizontal plane, the weight reduction structure group V includes four parts evenly distributed on the horizontal plane, the weight reduction structure group VI is located on the connecting rod, and the two round head slots and the holes are a group, distributed around each connecting rod.

[0015] Furthermore, the lattice structure adopts a four-layer variable diameter and variable height gradient lattice structure. The diameter of the rods in each layer decreases continuously from bottom to top, which are 3.0-2.5mm, 2.5-2.0mm, 2.0-1.5mm, and 1.5-1.0mm respectively. The size of the lowest layer unit cell is 15mm×15mm×15mm. From bottom to top, the size is 3mm shorter than the previous layer, that is, the remaining sizes are 12mm, 9mm, and 6mm respectively. The size change is that each multi-layer gradient structure is divided into 4 layers of space in the vertical direction, and the overall four-layer space size is 15mm×15mm×42mm.

[0016] The beneficial effects of the present invention compared with the prior art are:

[0017] 1 The device of the present invention adopts a two-stage unlocking method and is equipped with a turntable-type four-claw clamping mechanism to prevent the unlocking part of the shape memory alloy primary separation component from being unlocked prematurely due to vibration. Compared with the traditional single-stage separation device, the separation reliability can be further improved.

[0018] 2 The device of the present invention realizes separation distance adjustment, satellite attitude control and orbit adjustment through the shape memory alloy primary separation component, thereby ensuring the satellite orbit accuracy. It overcomes the shortcomings of traditional pyrotechnic separation devices such as large separation impact and poor separation safety.

[0019] 3 The bottom plate structure of the device of the present invention adopts a lattice structure, which is arranged at intervals, can effectively reduce the dead weight of the structure, improve the strength and stability of the structure, and reduce the amount of material used, thereby achieving multiple optimizations of the structural performance.

[0020] The overall lightweight design of the present invention is adopted. Under the premise of ensuring sufficient strength and stability, the weight of the structure is reduced as much as possible by reducing unnecessary structural components, optimizing the structural shape, etc., thereby reducing the launch cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional diagram of a non-pyrotechnic two-stage star-rocket locking and separation device;

[0022] Figure 2 is a cross-sectional view of a shape memory alloy primary separation component;

[0023] Figure 3 is a cross-sectional view of a shape memory alloy primary separation component shell;

[0024] Figure 4 is a cross-sectional view of a base of a shape memory alloy primary separation component;

[0025] Figure 5 It is a front view of the slotted bolt shaft of the shape memory alloy primary separation component;

[0026] Figure 6 is a cross-sectional view of a sleeve of a shape memory alloy primary separation component;

[0027] Figure 7 is a cross-sectional view of a shape memory alloy primary separation component slider;

[0028] Figure 8 is a perspective view of a compression release assembly;

[0029] Fig. 9 A three-dimensional diagram of the quick separation of the compression release assembly;

[0030] Fig.10 A three-dimensional diagram of a compression release assembly housing;

[0031] Fig.11 is a perspective view of a side panel of a compression release assembly;

[0032] Fig.12 It is a three-dimensional diagram of the turntable four-claw two-stage clamping and separation assembly;

[0033] Fig.13 It is a three-dimensional diagram of the claw guide groove of the turntable four-claw secondary clamping and separation assembly;

[0034] Fig.14 This is a left view of the claws of the turntable four-claw secondary clamping and separation assembly;

[0035] Fig.15 It is a top view of the turntable of the turntable four-claw two-stage clamping and separation assembly;

[0036] Fig.16 is a three-dimensional diagram of a pressure plate;

[0037] Fig.17 A three-dimensional diagram of the base plate. DETAILED DESCRIPTION

[0038] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of this patent, not all of them. 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 this patent. The implementation methods of the present invention are described in detail. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0039] The existing satellite unlocking and separation devices have no redundant design at the separation and unlocking point, which will lead to low reliability of satellite separation. In addition, most satellite unlocking and separation devices use pyrotechnic separation mechanisms, which will generate large impact force and pollutants when unlocking, which may have a significant impact on the space mission and may even cause the space mission to fail.

[0040] In view of this, the present invention proposes a non-pyrotechnic two-stage star-rocket locking and separation device, such as Figures 1 to 17 As shown, it includes: a shape memory alloy primary separation component 1, a clamping release component 2, a turntable four-claw secondary clamping and separation component 3, a pressure plate 4, and a bottom plate 5. Figure 1 As shown, the pressing plate 4 is installed in the middle of the four sides of the bottom plate 5, so that the boss of the rotating disk 305 in the rotating disk four-claw secondary clamping and separating assembly 3 and the through hole gap in the pressing plate 4 are matched, and the claw guide groove 301 in the rotating disk four-claw secondary clamping and separating assembly 3 is connected to the bottom plate 5; the rotating disk four-claw secondary clamping and separating assembly 3 is installed in the middle of the bottom plate 5, and its upper part is in contact with the pressing plate 4; the inclined groove of the separation block 201 in the clamping and releasing assembly 2 is clamped by the inclined surface of the claw group 302 in the rotating disk four-claw secondary clamping and separating assembly 3; the clamping and releasing assembly 2 is installed at the four corners of the bottom plate 5, including the shape The shape memory alloy primary separation component 1 and the separation block 201 for connecting to the outside, the separation block 201 is connected to the clamping release component 2, and the clamping release component 2 provides the separation block 201 with an elastic force away from the mounting base plate 5; the shape memory alloy primary separation component 1 is located inside the box body 202 in the clamping release component 2, the shape memory alloy primary separation component 1 is connected to the box body 202, and the upper part of the slotted bolt shaft 103 in the shape memory alloy primary separation component 1 passes through the through hole of the separation block 201 and is connected to the outside; the base plate 5 serves to connect to the outside.

[0041] The structure and working principle of the shape memory alloy primary separation component 1 are described in detail below:

[0042] like Figures 2 to 7As shown, the shape memory alloy primary separation component 1 includes a shell 101, a base 102, a slotted bolt shaft 103, a spring II 104, a sleeve 105, a spring III 106, a slider 107, a steel ball 108, a shape memory alloy rod 109 and a power cable 110; the through hole V 1011 on the upper part of the shell 101 can pass through the slotted bolt shaft 103, the internal thread 1012 of the shell 101 and the external thread I 1021 of the base 102 are fastened and connected; the shoulder I 1031 of the slotted bolt shaft 103 is movably connected to the limiting part I 1013 of the shell 101; the spherical concave surface 1032 of the slotted bolt shaft 103 is movably connected to the steel ball 108; the upper part of the spring II 104 is installed in the groove I 1014 of the shell 101, and the lower part is movably connected to the shoulder II 1033 of the slotted bolt shaft 103; the middle part of the sleeve 105 has a square Hole 1051, the steel ball 108 is located in the square hole 1051; there are two limit blocks evenly distributed on the horizontal plane in the limit block group 1052 of the sleeve 105, and the two limit blocks are located in the guide groove group III1034 of the slotted bolt shaft 103; the upper part of the spring III106 is movably connected to the hole VI1053 of the sleeve 105, and the lower part is movably connected to the hole VII1071 of the slider 107; the slider 107 is located in the sleeve 105, and the lower part is located in the hole III1022 of the base 102 and is movably connected to the shape memory alloy rod 109; one side of the steel ball 108 is movably connected to the slotted bolt shaft 103, and one side is movably connected to the slider 107; the shape memory alloy rod 109 is located in the hole IV1023 of the base 102, and the bottom is connected to the power cable 110; the power cable 110 is connected to the external power supply through the hole V1024 of the base 102.

[0043] Further, in the initial locking state, the memory alloy rod 109 is in a low-temperature deformation state, that is, a compressed state. At this time, the upper end of the memory alloy rod 109 just contacts the bottom of the slider 107, and the bottom of the slider 107 contacts the upper end surface of the base 102 under the action of the spring III 106. Under the action of the spring II 104, the inner semicircular surface of the lower end of the slotted bolt shaft 103 and the slider 107 jointly constrain the radial movement of the steel ball 108, that is, to ensure that the slotted bolt shaft 103 will not be retracted. At this time, the spring II 104 is in a compressed state. When the device reaches the specified track, the separation device starts to perform the separation task. When the first separation unlocking is performed after the second separation unlocking is completed, the memory alloy rod 109 is energized through the power cable 110. The memory alloy rod 109 restores its original length after powering on, pushing the slider 107 to move axially until it contacts the upper end of the sleeve 105. The steel ball 108 moves toward the axis under the action of the lower end of the slotted bolt shaft 103 until it contacts the minimum cylindrical surface (limiting portion III 1072) of the slider 107. Under the action of spring II 104, the slotted bolt shaft 103 moves axially downward, and after the slotted opening 1035 breaks, the slotted bolt shaft 103 is retracted into the housing 101, completing the first-level unlocking.

[0044] The structure and working principle of the compression release assembly 2 are described in detail below:

[0045] like Figures 8 to 11 As shown, the compression release assembly 2 includes a separation block 201, a box body 202, a spring I 203 and a side plate 204; the through hole group III 2011 of the separation block 201 has four through holes evenly distributed on the same horizontal end surface, which are connected to the satellite through threads; the spring I 203 is located in the cylinder 2021 of the box body 202, and the column 2012 on the separation block 201 is located in the spring I 203 and continues to extend downward into the hole II 2024 of the box body 202; the countersunk hole group II 2041 on the side plate 204 has a total of six countersunk holes arranged on both sides of the side plate, which are fastened to the threaded hole group 2022 of the box body 202 by screws. The through hole IV2042 in the side plate 204 is movably connected to the boss of the base 102 in the shape memory alloy primary separation component 1; the through hole group II2023 in the box body 202 is fastened with the through hole group V1015 in the shell 101 of the shape memory alloy primary separation component 1 by bolts, the slotted bolt shaft 103 in the shape memory alloy primary separation component 1 passes through the through hole III2014 of the separation block 201, and a hexagonal flange nut is installed on the external thread 1036 at the top of the slotted bolt shaft 103, so that the shape memory alloy primary separation component 1 and the clamping release component 2 are installed, and together constitute a primary unlocking mechanism.

[0046] The structure and working principle of the turntable four-claw secondary clamping and separation component 3 are described in detail below:

[0047] like Fig.12 (a), (b), Figures 13 to 15 As shown, the turntable four-claw two-stage clamping and separating assembly 3 includes a claw guide groove 301, a claw group 302, a bearing 303, a motor 304 and a turntable 305. The claw guide groove 301 has four "T"-shaped guide grooves evenly distributed on the horizontal plane, and the four claws in the claw group 302 are respectively installed in the "T"-shaped grooves; the guide rod 3021 in the claw is simultaneously located in the guide groove group I 3011 of the claw guide groove 301 and the arc guide groove group II 3051 of the turntable 305; the bearing 303 is located in the groove I 3012 of the claw guide groove 301, and is interference fit with the groove I 3012 and the journal 3052 of the turntable 305; the motor 304 is located inside the claw guide groove 301, and the rotating shaft of the motor 304 and the hole I of the turntable 305 are connected by a pin.

[0048] Furthermore, before unlocking, i.e., in the initial locking state, the motor 304 is not powered on and remains in a self-locking state. The cylindrical protrusion on the claw group 302 is located at the farthest end of the arc-shaped guide groove group II 3051 on the turntable 305, and the four claws of the claw group 302 are respectively clamped on the corresponding inclined grooves 2013 on the four separation blocks 201, which play a clamping role. When reaching the designated track, the separation task begins, and the secondary unlocking is first performed. At this time, the motor 304 is powered on, and the motor 304 drives the turntable 305 to rotate counterclockwise, so that the cylindrical protrusion on the claw moves along the guiding direction of the arc-shaped guide groove group II 3051 on the turntable 305, driving the four claws to move toward the center of the circle; when the cylindrical protrusion on the claw moves to the innermost of the arc-shaped notch on the turntable, the motor 304 stops rotating and remains self-locking, completing the secondary unlocking.

[0049] The structure and principle of the pressing plate 4 are described in detail below:

[0050] like Fig.16 As shown, the through hole Ⅰ41 of the pressure plate 4 and the boss clearance of the turntable of the four-claw two-stage clamping and separation assembly of the turntable are matched, and the matching clearance is S, and the value range of S is 0.2~0.3mm, which can ensure the neutrality of the turntable movement and does not hinder the rotation of the turntable; the pressure plate 4 is provided with a weight reduction structure group Ⅰ42 and a weight reduction structure group Ⅱ43, the weight reduction structure group Ⅰ42 includes four round-headed slots evenly distributed on the same circumference, and the weight reduction structure group Ⅱ43 includes four round-headed slots evenly distributed on the horizontal plane; the pressure plate 4 is installed on the top of the four-claw two-stage clamping and separation assembly of the turntable, and the through hole group Ⅰ44 of the pressure plate 4 is fastened to the through hole group Ⅵ55 of the bottom plate 5 by bolts.

[0051] The structure and principle of the bottom plate 5 are described in detail below:

[0052] like Fig.17 As shown, the countersunk hole group III 51 of the bottom plate 5 is fastened; the bottom plate 5 is provided with a lattice structure group 54 including four parts evenly distributed on the horizontal plane, the weight-reducing structure group V 52 includes four parts evenly distributed on the horizontal plane, and the weight-reducing structure group VI 53 is located on the connecting rod, and the two round head slots and holes are a group, distributed around each connecting rod. The bottom plate 5 adopts a lightweight design to reduce the overall weight, reduce the initial weight of the launch, and control the launch cost. The bottom plate 5 is provided with a through hole V 56 and a countersunk hole group IV 57.

[0053] Further, such as Fig.17As shown, the four corners of the bottom plate 5 are provided with a lattice structure group 54. The lattice structure 54 adopts a four-layer variable diameter and variable height gradient lattice structure design. The rod diameter of each layer is designed to decrease continuously from bottom to top, which is 3.0-2.5mm, 2.5-2.0mm, 2.0-1.5mm, and 1.5-1.0mm respectively. The size of the lowest layer unit cell is 15mm×15mm×15mm. From bottom to top, the size is 3mm shorter than the previous layer, that is, the remaining sizes are 12mm, 9mm, and 6mm respectively. The size change is that each multi-layer gradient structure is divided into four layers of space in the vertical direction, and the overall size of the four-layer space is 15mm×

[0054] 15mm×42mm. The lattice structure of the bottom plate 5 enables the satellite to have a buffering and energy absorbing effect, thereby improving the reliability of separation.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A non-pyrotechnic two-stage star-rocket locking and separation device, characterized in that: include: A shape memory alloy primary separation component, a clamping and releasing component, a turntable four-claw secondary clamping and separating component, a pressure plate, and a bottom plate. The box body of the clamping and releasing component is fixed on the bottom plate, and the shape memory alloy primary separation component is installed inside. The slotted bolt shaft of the shape memory alloy primary separation component extends out of one end of the shell body, passes through the through hole of the separation block and is connected with the nut. The shape memory alloy primary separation component is provided with driving force by the shape memory alloy rod, and together they constitute a primary unlocking mechanism. The claw guide groove of the turntable four-claw secondary clamping and separating component is fixed on the bottom plate, the turntable controls the locking of the claw group, and the claw connects the separation block of the clamping and releasing component, and together they constitute a secondary unlocking mechanism. When the device is locked, it is first locked by the shape memory alloy primary separation component, and then locked by the turntable four-claw secondary clamping and separating component; when the device is separated, it is first unlocked by the turntable four-claw secondary clamping and separating component, and then unlocked by the shape memory alloy primary separation component.

2. The non-pyrotechnic two-stage star-rocket locking and separation device according to claim 1 is characterized in that: The shape memory alloy primary separation component is located inside the box body in the compression release component. The shape memory alloy primary separation component and the box body are fastened and connected via through hole group III and through hole group V bolts, and the upper part of the slotted bolt shaft in the shape memory alloy primary separation component passes through through hole III in the separation block and is connected to the nut.

3. The non-pyrotechnic two-stage star-rocket locking and separating device according to claim 1 is characterized in that: There are four sets of clamping and releasing components, which are evenly distributed on the upper part of the bottom plate and are fastened and connected via bolts of through hole group IV and through hole group V. The inclined groove of the separation block in the clamping and releasing component is clamped by the inclined surface in the secondary clamping and separating component of the four-claw turntable.

4. The non-pyrotechnic two-stage star-rocket locking and separating device according to claim 1 is characterized by: The turntable four-claw two-stage clamping and separation assembly is located between the pressure plate and the base plate, and the boss of the turntable and the through hole I in the pressure plate are clearance-matched; the clamping claw guide groove and the base plate in the turntable four-claw two-stage clamping and separation assembly are fastened and connected via countersunk hole group I and countersunk hole group IV bolts; the pressure plate and the base plate are fastened and connected via through hole group I and through hole group VI bolts.

5. The non-pyrotechnic two-stage star-rocket locking and separating device according to claim 1 is characterized in that: The shape memory alloy primary separation component comprises a shell, a base, a slotted bolt shaft, a spring II, a sleeve, a spring III, a slider, a steel ball, a shape memory alloy rod and a power cable; the through hole V on the upper part of the shell passes through the slotted bolt shaft, and the internal thread of the shell is tightly connected with the external thread I of the base; the shoulder I of the slotted bolt shaft is movably connected with the limiting part I of the shell; the spherical concave surface of the slotted bolt shaft is movably connected with the steel ball; the upper part of the spring II is installed in the groove I of the shell, and the lower part is movably connected with the shoulder II of the slotted bolt shaft; There is a square hole in the middle of the sleeve, and the steel ball is located in the square hole; there are two limit blocks evenly distributed on the horizontal plane in the limit block group of the sleeve, and the two limit blocks are located in the guide groove group III of the slotted bolt shaft; the upper part of the spring III is movably connected to the hole VI of the sleeve, and the lower part is movably connected to the hole VII of the slider; the slider is located in the sleeve, and the lower part is located in the hole III of the base and is movably connected to the shape memory alloy rod; one side of the steel ball is movably connected to the slotted bolt shaft, and the other side is movably connected to the slider; the shape memory alloy rod is located in the hole IV of the base, and the bottom is connected to the power cable; the power cable is connected to the external power supply through the hole V of the base.

6. The non-pyrotechnic two-stage star-rocket locking and separating device according to claim 1 is characterized by: The clamping and releasing assembly includes a separation block, a housing, a spring I and a side plate. The through hole group III of the separation block has four through holes evenly distributed on the same horizontal end surface and connected to the satellite through threads; the spring I is located in the cylinder of the housing, the column on the separation block is located in the spring I, and continues to extend downward into the hole II of the housing; the countersunk hole group II on the side plate has a total of six countersunk holes arranged on both sides of the side plate, and is fastened to the threaded hole group of the housing through screws; the through hole IV in the side plate is movably connected to the base boss in the shape memory alloy primary separation assembly; the through hole group II in the housing is fastened to the through hole group V in the shell of the shape memory alloy primary separation assembly through bolts, the slotted bolt shaft in the shape memory alloy primary separation assembly passes through the through hole III of the separation block, and a hexagonal flange nut is installed on the top of the slotted bolt shaft.

7. The non-pyrotechnic two-stage star-rocket locking and separating device according to claim 1 is characterized by: The turntable four-claw two-stage clamping and separation assembly consists of a claw guide groove, a claw group, a bearing, a motor and a turntable; the claw guide groove has four "T"-shaped guide grooves evenly distributed on the horizontal plane, and the four claws in the claw group are respectively installed in the "T"-shaped grooves; the guide rod in the claw is located in the guide groove group I of the claw guide groove and the guide groove group II of the turntable at the same time; the bearing is located in the groove I of the claw guide groove, and is an interference fit with the groove I and the shaft neck of the turntable; the motor is located inside the claw guide groove, and the rotating shaft of the motor and the hole I of the turntable are connected by a pin.

8. The non-pyrotechnic two-stage star-rocket locking and separating device according to claim 1 is characterized by: The through hole Ⅰ of the pressure plate and the boss clearance of the turntable of the four-claw two-level clamping and separation assembly of the turntable are matched, and the matching clearance is S, and the value range of S is 0.2-0.3mm, which can ensure the neutrality of the turntable movement and does not hinder the rotation of the turntable; the pressure plate is provided with a weight reduction structure group Ⅰ and a weight reduction structure group Ⅱ, the weight reduction structure group Ⅰ includes four round-headed slot holes evenly distributed on the same circumference, and the weight reduction structure group Ⅱ includes four round-headed slot holes evenly distributed on the horizontal plane; the pressure plate is installed on the top of the four-claw two-level clamping and separation assembly of the turntable, and the through hole group Ⅰ of the pressure plate is fastened to the through hole group Ⅵ of the bottom plate by bolts.

9. The non-pyrotechnic two-stage star-rocket locking and separating device according to claim 1 is characterized by: The countersunk hole group III of the base plate is fastened to the rocket; a lattice structure group, a weight reduction structure group V and a weight reduction structure group VI are provided on the base plate; the lattice structure group includes four parts evenly distributed on the horizontal plane, the weight reduction structure group V includes four parts evenly distributed on the horizontal plane, and the weight reduction structure group VI is located on the connecting rod, and the two round head slots and the holes are a group, distributed around each connecting rod.

10. The non-pyrotechnic two-stage star-rocket locking and separating device according to claim 9 is characterized in that: The lattice structure adopts a four-layer variable diameter and variable height gradient lattice structure. The diameter of the rods in each layer decreases continuously from bottom to top, which are 3.0~2.5mm, 2.5~2.0mm, 2.0~1.5mm, and 1.5~1.0mm respectively. The unit cell size of the lowest layer is 15mm×15mm×15mm. From bottom to top, the size is 3mm shorter than the previous layer, that is, the remaining ones are 12mm, 9mm, and 6mm respectively. The size change is that each multi-layer gradient structure is divided into 4 layers of space in the vertical direction, and the overall four-layer space size is 15mm×15mm×42mm.

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