Non-explosive secondary star-rocket locking separation device

Abstract

The present application relates to a non-explosive secondary star-rocket locking and separating device, comprising a shape memory alloy primary separating component, a pressing and releasing component, a rotating disc four-jaw secondary clamping and separating component, and the box of the pressing and releasing component is provided with the shape memory alloy primary separating component; the cut groove bolt shaft of the shape memory alloy primary separating component extends out of the one end of the shell, penetrates through the through hole of the separating block, and is connected with the nut; the shape memory alloy primary separating component is driven by the shape memory alloy rod to jointly constitute a primary unlocking mechanism; the jaw guide groove of the rotating disc four-jaw secondary clamping and separating component is fixed on the bottom plate, the rotating disc controls the locking of the jaw group, the jaw is connected with the separating block of the pressing and releasing component, and jointly constitutes a secondary unlocking mechanism; when the device is locked, the shape memory alloy primary separating component is locked first, and then the rotating disc four-jaw secondary clamping and separating component is locked; when the device is separated, the rotating disc four-jaw secondary clamping and separating component is unlocked first, and then the shape memory alloy primary separating component is unlocked.

Description

Technical Field

[0001] This invention relates to an aerospace star-rocket locking and separation device, and more particularly to a non-pyrotechnic, two-stage star-rocket locking and separation device. Background Technology

[0002] The rocket-satellite separation device is used to separate the rocket from the satellite during space launches. Currently, separation devices are divided into two types: pyrotechnic release and non-pyrotechnic release. Pyrotechnic releases have particularly large impacts, posing safety hazards, environmental pollution, and drawbacks such as non-repeatable testing and use. Unlike traditional pyrotechnic separation devices, non-pyrotechnic, two-stage rocket-satellite locking separation devices have advantages such as reduced impact, reduced load on the ignition system, elimination of safety protection issues, and guaranteed device reliability. Therefore, only non-pyrotechnic, two-stage rocket-satellite locking separation devices are permitted to undergo full flight environment testing and full-function verification.

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

[0004] While traditional pyrotechnic separation mechanisms can achieve the desired results, they suffer from significant drawbacks such as high separation impact, poor safety, lack of repeatability, and other notable defects. 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 second-stage satellite-rocket locking and separation device, which can realize non-pyrotechnic unlocking and separation of satellite and spacecraft, improve the poor separation attitude of satellite and the low reliability of satellite separation.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: a non-pyrotechnic secondary star-rocket locking and separation device, comprising: a shape memory alloy primary separation component, a pressure release component, a turntable four-jaw secondary clamping and separation component, a pressure plate, and a base plate. The housing of the pressure release component is fixed on the base plate, and the shape memory alloy primary separation component is installed inside. The grooved bolt shaft of the shape memory alloy primary separation component extends out of the housing, passes through the through hole of the separation block, and is connected to a nut. The shape memory alloy primary separation component is driven by a shape memory alloy rod, together forming a primary unlocking mechanism. The jaw guide groove of the turntable four-jaw secondary clamping and separation component is fixed on the base plate. The turntable controls the jaw assembly to lock. The jaws are connected to the separation block of the pressure release component, together forming 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-jaw secondary clamping and separation component. When the device is separated, it is first unlocked by the turntable four-jaw secondary clamping and separation component, and then unlocked by the shape memory alloy primary separation component.

[0007] Furthermore, the shape memory alloy primary separation component is located inside the housing of the compression release component. The shape memory alloy primary separation component and the housing are fastened together by 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 base plate and are fastened together by 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 turntable four-jaw two-stage clamping and separating component.

[0009] Furthermore, the turntable four-jaw two-stage clamping and separation assembly is located between the pressure plate and the base plate, with the turntable boss and the through hole I in the pressure plate having clearance fit; the jaw guide groove in the turntable four-jaw two-stage clamping and separation assembly and the base plate are fastened together by countersunk hole group I and countersunk hole group IV bolts; the pressure plate and the base plate are fastened together by through hole group I and through hole group VI bolts.

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

[0011] Furthermore, the compression release assembly includes a separation block, a housing, spring I, and a side plate. The separation block has four through holes (group III) evenly distributed on the same horizontal end face, which are connected to the satellite via threads. Spring I is located in the cylinder of the housing, and the post on the separation block is located in spring I and extends downward into the hole II of the housing. The countersunk hole group II on the side plate has six countersunk holes arranged on both sides of the side plate, which are fastened to the threaded hole group of the housing by 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 housing of the shape memory alloy primary separation assembly by 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-jaw two-stage clamping and separating assembly consists of a jaw guide groove, a jaw assembly, a bearing, a motor, and a turntable. The jaw guide groove has four "T"-shaped guide grooves evenly distributed on the horizontal plane, and the four jaws in the jaw assembly are respectively installed in the "T"-shaped grooves. The guide rod in the jaw is located in both the guide groove group I of the jaw guide groove and the guide groove group II of the turntable. The bearing is located in the groove I of the jaw guide groove, and is interference-fitted with both the groove I and the journal of the turntable. The motor is located inside the jaw guide groove, and the motor shaft is connected to the hole I of the turntable by a pin.

[0013] Furthermore, the through hole I of the pressure plate and the boss of the turntable in the four-jaw two-stage clamping and separating assembly are fitted with a clearance of S, where S ranges from 0.2 to 0.3 mm, ensuring the turntable's movement is aligned and does not obstruct its rotation. The pressure plate is provided with a weight-reducing structure group I and a weight-reducing structure group II. Weight-reducing structure group I includes four round-headed slots evenly distributed on the same circumference, and weight-reducing structure group II includes four round-headed slots evenly distributed on the horizontal plane. The pressure plate is installed on the top of the four-jaw two-stage clamping and separating assembly, and the through hole group I of the pressure plate is fastened to the through hole group VI of the base plate by bolts.

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

[0015] Furthermore, the lattice structure adopts a four-layer gradient lattice structure with varying diameters and heights. The diameter of the rods in each layer decreases continuously from bottom to top, namely 3.0–2.5 mm, 2.5–2.0 mm, 2.0–1.5 mm, and 1.5–1.0 mm. The unit cell size of the lowest layer is 15 mm × 15 mm × 15 mm. As the layers move upwards, the size of each layer is 3 mm shorter than the previous one, namely 12 mm, 9 mm, and 6 mm respectively. The size change is that each multi-layer gradient structure is divided into four spatial layers in the vertical direction, and the overall four-layer spatial size is 15 mm × 15 mm × 42 mm.

[0016] The advantages of this invention compared to the prior art are:

[0017] 1. The device of this invention adopts a two-stage unlocking method, installing a rotary four-jaw clamping mechanism to prevent premature unlocking of the unlocking part in the shape memory alloy primary separation component due to vibration. Compared with traditional single-stage separation devices, it can further improve separation reliability.

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

[0019] 3. The base plate of the device of the present invention adopts a dot matrix structure. The dot matrix structure is arranged at intervals, which can effectively reduce the self-weight of the structure, improve the strength and stability of the structure, and reduce the amount of material used, thus achieving multiple optimizations of the structural performance.

[0020] 4. The present invention adopts a lightweight design. While ensuring sufficient strength and stability, it reduces the weight of the structure and lowers the launch cost by reducing unnecessary structural components and optimizing the structural shape. Attached Figure Description

[0021] Figure 1 A perspective view of a non-pyrotechnic two-stage satellite-rocket locking and separation device;

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

[0023] Figure 3 This is a cross-sectional view of the housing of the primary separation component of the shape memory alloy.

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

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

[0026] Figure 6 A cross-sectional view of the sleeve of the first-stage separation component of shape memory alloy;

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

[0028] Figure 8 A perspective view of the compression release assembly;

[0029] Figure 9 A 3D view showing the rapid separation of the compression release component;

[0030] Figure 10 A perspective view of the housing for the compression and release component;

[0031] Figure 11 A perspective view of the side panel of the compression release component;

[0032] Figure 12 A 3D view of the turntable four-jaw two-stage clamping and separating assembly;

[0033] Figure 13 A three-dimensional view of the jaw guide groove of the four-jaw two-stage clamping and separating assembly of the turntable;

[0034] Figure 14 Left view of the four-jaw two-stage clamping and separating assembly of the turntable;

[0035] Figure 15 A top view of the turntable of the four-jaw two-stage clamping and separating assembly;

[0036] Figure 16 This is a 3D view of the pressure plate;

[0037] Figure 17 This is a three-dimensional view of the base plate. Detailed Implementation

[0038] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this patent, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of this patent. The implementation methods of the present invention will be described in detail. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0039] Existing satellite unlocking and separation devices lack redundancy at the unlocking point, leading to lower satellite separation reliability. Furthermore, many satellite unlocking and separation devices employ pyrotechnic separation mechanisms, which generate significant impact and contaminants during unlocking, potentially severely affecting space missions and even causing mission failure.

[0040] In view of this, the present invention proposes a non-pyrotechnic secondary-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 and releasing component 2, a turntable four-jaw secondary clamping and separation component 3, a pressure plate 4, and a base plate 5. Figure 1 As shown, the pressure plate 4 is installed in the middle of the four sides of the base plate 5, so that the boss of the turntable 305 in the turntable four-jaw secondary clamping and separating assembly 3 and the through hole in the pressure plate 4 are fitted with a clearance. The jaw guide groove 301 in the turntable four-jaw secondary clamping and separating assembly 3 is connected to the base plate 5. The turntable four-jaw secondary clamping and separating assembly 3 is installed in the middle of the base plate 5, and its upper part is in contact with the pressure plate 4. The inclined groove of the separating block 201 in the clamping and releasing assembly 2 is clamped by the inclined surface of the jaw group 302 in the turntable four-jaw secondary clamping and separating assembly 3. The clamping and releasing assembly 2 is installed at the four corners of the base plate 5, including the shape The shape memory alloy primary separation component 1 and the separation block 201 for external connection are provided. The separation block 201 is connected to the clamping release component 2, which 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 housing 202 in the clamping release component 2. The shape memory alloy primary separation component 1 and the housing 202 are connected, 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 housing 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 housing 101 allows passage through the slotted bolt shaft 103. The internal thread 1012 of the housing 101 is fastened to the external thread I 1021 of the base 102. The shoulder I 1031 of the slotted bolt shaft 103 is movably connected to the limiting part I 1013 of the housing 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 housing 101, and the lower part is movably connected to the shoulder II 1033 of the slotted bolt shaft 103. The sleeve 105 has a square... Hole 1051, steel ball 108 is located in square hole 1051; there are two limiting blocks evenly distributed on the horizontal plane in the limiting block group 1052 of sleeve 105, the two limiting blocks are located in the guide groove group Ⅲ1034 of grooving bolt shaft 103; the upper part of spring Ⅲ106 is movably connected to hole Ⅵ1053 of sleeve 105, and the lower part is movably connected to hole Ⅶ1071 of slider 107; slider 107 is located in sleeve 105, the lower part is located in hole Ⅲ1022 of base 102 and is movably connected to shape memory alloy rod 109; one side of steel ball 108 is movably connected to grooving bolt shaft 103, and the other side is movably connected to slider 107; shape memory alloy rod 109 is located in hole Ⅳ1023 of base 102, and the bottom is connected to power cable 110; power cable 110 is connected to external power source through hole Ⅴ1024 of base 102.

[0043] Furthermore, in the initial locked state, the shape memory alloy rod 109 is in a low-temperature deformation state, i.e., a compressed state. At this time, the upper end of the shape memory alloy rod 109 is just in contact with the bottom of the slider 107, and the bottom of the slider 107 contacts the upper surface of the base 102 under the action of spring III 106. Under the action of spring II 104, the lower inner semicircular surface of the slotted bolt shaft 103 and the slider 107 together constrain the radial movement of the steel ball 108, thus ensuring that the slotted bolt shaft 103 will not retract. At this time, spring II 104 is in a compressed state. When the device reaches the designated track, the separation device begins to perform the separation task. When the secondary separation unlocking is completed and the primary separation unlocking is performed, the shape memory alloy rod 109 is energized through the power cable 110. After being energized, the shape memory alloy rod 109 returns to its original length, pushing the slider 107 to move axially until it contacts the upper end of the sleeve 105. The steel ball 108 moves towards the axis under the action of the lower end of the slotted bolt shaft 103 until it contacts the smallest cylindrical surface (limiting part III 1072) of the slider 107. Under the action of spring II 104, the slotted bolt shaft 103 moves axially downward. After the slot 1035 breaks, the slotted bolt shaft 103 will retract into the housing 101, completing the first-level unlocking.

[0044] The structure and working principle of the compression release component 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 housing 202, a spring I 203, and a side plate 204; the separation block 201 has four through holes in the through hole group III 2011, which are evenly distributed on the same horizontal end face and are connected to the satellite by threads; the spring I 203 is located in the cylinder 2021 of the housing 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 housing 202; the countersunk hole group II 2041 on the side plate 204 has six countersunk holes arranged on both sides of the side plate and is fastened to the threaded hole group 2022 of the housing 202 by screws. The through hole IV 2042 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 II 2023 in the housing 202 is fastened to the through hole group V 1015 in the housing 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 III 2014 in the separation block 201, and a hexagonal flange nut is installed on the external thread 1036 on 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 the primary unlocking mechanism.

[0046] The following details the structure and working principle of the turntable four-jaw two-stage clamping and separating assembly 3:

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

[0048] Furthermore, before unlocking, i.e., in the initial locked state, the motor 304 is not powered and remains in a self-locking state. The cylindrical protrusions on the claw assembly 302 are located at the farthest end of the arc-shaped guide groove assembly II 3051 on the turntable 305. The four claws of the claw assembly 302 are respectively engaged in the corresponding inclined grooves 2013 on the four separation blocks 201, thus achieving a locking effect. When the designated track is reached, the separation task begins. First, a secondary unlocking is performed. At this time, the motor 304 is powered on, and the motor 304 drives the turntable 305 to rotate counterclockwise, causing the cylindrical protrusions on the claws to move along the guide direction of the arc-shaped guide groove assembly II 3051 on the turntable 305, driving all four claws to move towards the center. When the cylindrical protrusions on the claws move to the innermost part of the arc-shaped groove on the turntable, the motor 304 stops rotating and remains self-locking, completing the secondary unlocking.

[0049] The structure and working principle of pressure plate 4 are explained in detail below:

[0050] like Figure 16 As shown, the through hole I41 of the pressure plate 4 and the boss of the turntable of the turntable four-jaw two-stage clamping and separating assembly are fitted with a clearance of S, where S ranges from 0.2 to 0.3 mm, ensuring the turntable's movement is aligned and does not hinder its rotation. 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 turntable four-jaw two-stage clamping and separating assembly, and the through hole group I44 of the pressure plate 4 is fastened to the through hole group VI55 of the base plate 5 by bolts.

[0051] The structure and working principle of base plate 5 are explained in detail below:

[0052] like Figure 17 As shown, the countersunk hole group III 51 of the base plate 5 is fastened; the base plate 5 has a dot matrix structure group 54 consisting of four parts evenly distributed on the horizontal plane, a weight reduction structure group V 52 consisting of four parts evenly distributed on the horizontal plane, and a weight reduction structure group VI 53 located on the connecting rod. Two round-headed slots and holes form a group, distributed around each connecting rod. The base plate 5 adopts a lightweight design to reduce the overall weight, lower the initial launch weight, and control launch costs. The base plate 5 has a through hole V 56 and a countersunk hole group IV 57.

[0053] Furthermore, such as Figure 17As shown, the base plate 5 has lattice structure groups 54 at its four corners. The lattice structure 54 adopts a four-layer gradient lattice structure design with varying diameters and heights. The diameter of the rods in each layer decreases continuously from bottom to top, successively being 3.0–2.5 mm, 2.5–2.0 mm, 2.0–1.5 mm, and 1.5–1.0 mm. The lowest layer unit cell size is 15 mm × 15 mm × 15 mm, and each subsequent layer upwards is 3 mm shorter than the previous one, resulting in sizes of 12 mm, 9 mm, and 6 mm. This dimensional change occurs because each multi-layer gradient structure is divided into four spatial layers in the vertical direction, with the overall four-layer spatial dimensions being 15 mm × 15 mm.

[0054] 15mm × 42mm. The dot matrix structure of the base plate 5 gives the satellite a buffering and energy-absorbing effect, 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, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions 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 secondary-stage satellite-launch locking and separation device, characterized in that: include: The device comprises a shape memory alloy primary separation component, a clamping and releasing component, a turntable four-jaw secondary clamping and separation component, a pressure plate, and a base plate. The housing of the clamping and releasing component is fixed to the base plate, and the shape memory alloy primary separation component is installed inside. The grooved bolt shaft of the shape memory alloy primary separation component extends out of the housing, passes through the through hole of the separation block, and connects to the nut. The shape memory alloy primary separation component is driven by a shape memory alloy rod, together forming the primary unlocking mechanism. The pressure plate is installed in the middle of the four sides of the base plate, so that the boss of the turntable in the turntable four-jaw secondary clamping and separation component and the through hole in the pressure plate are in clearance fit. The jaw guide groove of the turntable four-jaw secondary clamping and separation component is fixed to the base plate. The turntable controls the jaw group to lock. The jaws connect to the separation block of the clamping and releasing component, together forming the 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-jaw secondary clamping and separation component. When the device is separated, it is first unlocked by the turntable four-jaw secondary clamping and separation component, and then unlocked by the shape memory alloy primary separation component.

2. The non-pyrotechnic secondary-stage star-rocket locking and separation device according to claim 1, characterized in that: The shape memory alloy primary separation component is located inside the housing of the compression release component. The shape memory alloy primary separation component and the housing are fastened together by through-hole group II 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 secondary-stage star-rocket locking and separation device according to claim 1, characterized in that: There are four sets of clamping and releasing components, which are evenly distributed on the upper part of the base plate. The box body and the shape memory alloy primary separation component are connected by bolts through through hole group V and through hole group II. The inclined groove of the separation block in the clamping and releasing component is clamped by the inclined surface in the turntable four-jaw secondary clamping and separation component.

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

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

6. The non-pyrotechnic secondary-stage star-rocket locking and separation device according to claim 1, characterized in that: The clamping release assembly includes a separation block, a housing, spring I, and a side plate. The separation block has four through holes (group III) evenly distributed on the same horizontal end face, which are connected to the satellite via threads. Spring I is located in the cylinder of the housing, and the post on the separation block is located in spring I and extends downward into the hole II of the housing. The countersunk hole group II on the side plate has six countersunk holes arranged on both sides of the side plate, which are fastened to the threaded hole group of the housing by 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 housing of the shape memory alloy primary separation assembly by 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 secondary-stage star-rocket locking and separation device according to claim 1, characterized in that: The turntable four-jaw two-stage clamping and separating assembly consists of a jaw guide groove, a jaw assembly, a bearing, a motor, and a turntable. The jaw guide groove has four "T"-shaped guide grooves evenly distributed on the horizontal plane, and the four jaws in the jaw assembly are respectively installed in the "T"-shaped grooves. The guide rod in the jaw is located in both the guide groove group I of the jaw guide groove and the guide groove group II of the turntable. The bearing is located in the groove I of the jaw guide groove, and has an interference fit with both the groove I and the journal of the turntable. The motor is located inside the jaw guide groove, and the motor shaft is connected to the hole I of the turntable by a pin.

8. The non-pyrotechnic secondary-stage star-rocket locking and separation device according to claim 1, characterized in that: The through hole I of the pressure plate and the boss of the turntable of the four-jaw two-stage clamping and separating assembly are fitted with a clearance of S, where S ranges from 0.2 to 0.3 mm, ensuring the turntable's movement is aligned and does not obstruct its rotation. The pressure plate is provided with a weight-reducing structure group I and a weight-reducing structure group II. Weight-reducing structure group I includes four round-headed slots evenly distributed on the same circumference, and weight-reducing structure group II includes four round-headed slots evenly distributed on the horizontal plane. The pressure plate is installed on the top of the turntable four-jaw two-stage clamping and separating assembly, and the through hole group I of the pressure plate is fastened to the through hole group VI of the base plate by bolts.

9. The non-pyrotechnic secondary-stage star-rocket locking and separation device according to claim 1, characterized in that: The countersunk hole group III of the base plate is fastened to the rocket; the base plate is provided with a lattice structure group, a weight reduction structure group V, and a weight reduction structure group VI; the lattice structure group consists of four parts evenly distributed on the horizontal plane, the weight reduction structure group V consists of four parts evenly distributed on the horizontal plane, and the weight reduction structure group VI is located on the connecting rod, with two round-headed slots and a middle hole forming a group, distributed around each connecting rod.

10. The non-pyrotechnic secondary-stage star-rocket locking and separation device according to claim 9, characterized in that: The lattice structure adopts a four-layer gradient lattice structure with varying diameter and height. The diameter of the rods in each layer decreases continuously from bottom to top, namely 3.0–2.5 mm, 2.5–2.0 mm, 2.0–1.5 mm, and 1.5–1.0 mm. The unit cell size of the lowest layer is 15 mm × 15 mm × 15 mm. The size of each layer is 3 mm shorter than the previous layer from bottom to top, namely 12 mm, 9 mm, and 6 mm respectively. The size change is that each multi-layer gradient structure is divided into four spatial layers in the vertical direction, and the overall four-layer spatial size is 15 mm × 15 mm × 42 mm.

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