A satellite-rocket separation unlocking actuator

Abstract

The present invention relates to a star-rocket separation and unlocking actuator; it comprises an outer shell and a tail cover, a housing cavity is provided inside the outer shell, an actuating pin through-hole and a limit mounting groove are provided on the outer shell, a mounting hole is provided at the bottom of the limit mounting groove; the limit mounting groove has a limit mounting plate, a circuit board and a supporting sleeve, a power supply connector is provided in the supporting sleeve, a guide column is provided on the limit mounting plate, and also comprises an actuating block, an actuating pin is installed on the actuating block, the actuating block is slidably connected with the guide column, a memory alloy wire is hung on the actuating block, and both ends of each memory alloy wire extend outwardly through the limit mounting plate and the circuit board in turn and extend into the supporting sleeve; an elastic part is provided between the limit mounting plate and the actuating block, the elastic part covers the memory alloy wire, and the two ends of the elastic part respectively resist the limit mounting plate and the actuating block; the structural design of the star-rocket separation and unlocking actuator is used to solve the technical problems that the existing star-rocket separation and unlocking action equipment has a complex structure, extremely low parts processing efficiency, extremely high cost, and cannot guarantee the yield rate.

Description

Technical Field

[0001] The present invention relates to the field of aerospace technology, and in particular to a satellite-rocket separation unlocking actuator. Background Art

[0002] There are many separation actions during the launch of a spacecraft, such as stage separation, rocket-satellite separation, fairing separation, etc. These actions are implemented by the corresponding separation devices, and the triggering of the actions is completed by the actuator. The actuator is an important device of the aerospace separation unlocking mechanism and is one of the keys to the realization of actions such as rocket separation, fairing separation, and stage separation.

[0003] Existing separation devices are generally operated by pyrotechnics, which have the advantages of high energy density and fast unlocking speed. However, the disadvantages of pyrotechnics are also very prominent, such as poor tolerance to complex electromagnetic environments, large impact force of pyrotechnics, strict requirements on assembly environment and transportation conditions of pyrotechnics, and non-repeatable testing. Non-actively driven actuators can avoid the above disadvantages. Shape memory alloys have shape memory function and can be changed in shape by electric drive. The power source used for actuators is reliable and convenient.

[0004] Patent CN113753268A discloses a satellite-rocket separation unlocking actuator, including an actuator housing and a tail end cover, a guide seat and a guide frame installed in the actuator housing, a fixed seat installed in the guide seat, a pull pin installed in the fixed seat, a guide frame and a mounting portion for mounting in cooperation with the guide seat, and a guide column arranged in the mounting portion, an elastic member installed on the guide column, the elastic member resists the pull pin, a memory alloy wire for driving the fixed seat to move is installed in the inner cavity of the guide frame, and an aviation connector for electrifying the memory alloy wire is installed on the tail end cover. However, the following problems arise in the preparation process of the above structure: 1) The guide seat, the guide frame and the fixed seat need to be accurately matched to ensure accurate installation. However, the satellite-rocket separation unlocking actuator is small in size, and to ensure the connection accuracy of the three structures, the selection of machining tools is demanding, and it needs to have an extremely high aspect ratio, which leads to serious lack of tool rigidity, seriously affecting the machining accuracy, resulting in extremely low parts machining efficiency, extremely high cost, and inability to guarantee the yield rate. 2) The fixed seat is clamped and assembled by the guide seat and the guide frame. If one of the guide seat and the guide frame makes a mistake during the preparation or assembly process, the fixed seat may be unable to move, requiring workers to have high repair skills, which invisibly increases production costs and production cycles. If the cumulative error is abnormally large, the fixed seat can move smoothly after the repair, but the matching pull pins are not coaxial with the guide seat and the outer cylinder of the actuator, resulting in part failure and the need to be remade. 3) The gap between the fixed seat and the guide seat and the guide frame is too large, which will directly lead to the skewed instability during the actuation of the actuator. This situation cannot be compensated by repair methods and the parts need to be remade.

[0005] In view of this, the present invention urgently needs to provide a satellite-rocket separation unlocking actuator. Summary of the invention

[0006] The purpose of the present invention is to provide a satellite-rocket separation and unlocking actuator, which can solve the technical problems of the existing satellite-rocket separation and unlocking equipment, such as complex structure, extremely low parts processing efficiency, extremely high cost, and inability to guarantee the yield rate, through the structural design of the satellite-rocket separation and unlocking actuator.

[0007] The present invention provides a satellite-rocket separation unlocking actuator, comprising a housing and a tail cover, wherein a receiving cavity is provided inside the housing, an actuating pin through hole communicating with the receiving cavity and used for an actuating pin to pass through is provided at one end of the housing, a position limiting installation groove is provided at the other end of the housing, and a mounting hole communicating with the receiving cavity is provided at the bottom of the position limiting installation groove;

[0008] The limit installation groove is embedded in the limit installation plate, the circuit board and the support sleeve in sequence, a power connector is installed in the support sleeve, and the power connector is fixedly connected to the housing through a tail cover;

[0009] The limit mounting plate is provided with a guide column extending into the accommodating cavity, and also includes an actuating block in frictional contact with the inner wall of the accommodating cavity, an actuating pin is installed on the actuating block, one end of the actuating pin extends from the actuating pin through-hole to the outside of the housing, the actuating block is slidably connected with the guide column, and a memory alloy wire for driving the actuating block to move is hung on the actuating block, and both ends of each memory alloy wire extend outwards and pass through the limit mounting plate and the circuit board in sequence and are fixedly connected to the circuit board;

[0010] An elastic member is arranged between the limit installation plate and the actuating block, the elastic member is covered with a memory alloy wire, and two ends of the elastic member respectively abut against the limit installation plate and the actuating block.

[0011] Preferably, the actuating block comprises a cylindrical mounting section, a connecting hole for mounting the actuating pin and penetrating the mounting section is provided at the center point of the mounting section, transverse grooves are symmetrically provided along the connecting hole on one end face of the mounting section, a longitudinal groove penetrating the two ends of each transverse groove is provided on the outer wall of the mounting section, and the two ends of each longitudinal groove in the length direction penetrate the two end faces corresponding to the mounting section, and a guide section is provided along the circumference of the connecting hole on one end face of the mounting section without a transverse groove, and each guide section corresponds to the longitudinal groove one by one on the axis, and an extension groove corresponding to the longitudinal groove one by one is provided on the outer wall of each guide section, and one end of the extension groove penetrates the longitudinal groove, and the other end penetrates the end face of the guide section;

[0012] Slots corresponding to the guide sections are arranged on the outer wall of the guide column, and two ends of each slot in the length direction respectively penetrate the two end surfaces of the guide column.

[0013] Preferably, the connecting hole includes an embedded section and a threaded section, the inner wall of the threaded section is provided with an internal thread, and the inner diameter of the embedded section is larger than the inner diameter of the threaded section; the actuating pin includes a glued section tightly embedded in the embedded section, an extended section threadedly connected to the threaded section, and an extended section extending outside the connecting hole, and the diameter of the glued section is greater than the diameter of the extended section.

[0014] Preferably, the slot is a V-shaped slot, and the bottom of the slot is rounded.

[0015] Preferably, the junction between the transverse groove and the longitudinal groove is rounded.

[0016] Preferably, the limiting mounting plate is provided with a first through hole for the memory alloy wire to pass through, and the side walls of each first through hole are connected to the side wall of the limiting mounting plate.

[0017] Preferably, an outer wall of the tail portion of the shell is provided with an outer thread, an inner wall of the tail cover is provided with an inner thread, and the tail cover is screwed and fixed to the shell.

[0018] Preferably, the support sleeve is provided in a split body, and the support sleeve comprises a first petal and a second petal that are in contact with each other.

[0019] Preferably, a polygonal embedding groove is provided at one end of the support sleeve, and a polygonal flange matching the polygonal embedding groove is circumferentially provided on the outer wall of the power connector.

[0020] Preferably, the housing, the limit mounting plate, the support sleeve, the guide column and the actuating block are all made of insulating materials; and a connecting flange is provided circumferentially on the outer wall of the housing.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] 1. The present invention provides a star-rocket separation unlocking actuator, wherein the limit mounting plate is installed in the limit mounting groove, the guide column of the limit mounting plate extends into the housing cavity of the housing and is slidably connected with the actuating block, the outer wall of the actuating block is frictionally connected with the inner wall of the housing cavity, an actuating pin is installed on the actuating block, and the actuating pin passes through the actuating pin hole, and the memory alloy wire shrinks by self-heating after being energized, which can drive the actuating block to move along the guide column toward the limit mounting plate, compress the elastic part, and complete the actuation; after the memory alloy wire is powered off, the memory alloy wire cools and stretches, and under the action of the elastic part, the actuating pin can be reset, and the actuating action of the actuating pin can be completed through the above process. The above structural design can ensure the accuracy of the structural connection between the guide column and the actuating block, and the structural accuracy between the guide column and the housing, respectively, during the processing process, so as to complete the actuating action, without having to ensure the structural accuracy between the guide column, the actuating block and the housing at the same time, thereby reducing the requirements for processing tools and processing equipment, and having low preparation costs and high yields. In addition, the above structure is simple and easy to assemble.

[0023] 2. A star-rocket separation and unlocking actuator provided by the present invention has an installation section designed through the structural design of the actuator block. The installation section can interact with the shell and move along a straight line. The guide section can be plugged into the guide column and move on the guide column. Both ends of the actuator block are guided to ensure the stability of the movement of the actuator block. The design of the transverse groove, the longitudinal groove and the extension groove can facilitate the connection between the memory alloy wire and the actuator block. The transverse groove, the longitudinal groove and the extension groove must have a certain depth to avoid leakage of the memory alloy wire, ensure that the memory alloy wire does not contact the elastic part, ensure that the memory alloy wire is not worn, and ensure the contraction effect and service life of the memory alloy wire.

[0024] 3. A satellite-rocket separation and unlocking actuator provided by the present invention, wherein a connecting hole comprises an embedded section and a threaded section, an inner wall of the threaded section is provided with an internal thread, and an inner diameter of the embedded section is larger than an inner diameter of the threaded section; an actuating pin comprises a bonding section tightly embedded in the embedded section, an extending section threadedly connected to the threaded section, and an extending section extending out of the connecting hole, and a diameter of the bonding section is greater than a diameter of the extending section and a diameter of the extending section; through the above-mentioned structural design, after the actuating pin and the actuating block are assembled, a mixed connection mode of threading and bonding can be realized, the embedded section and the bonding section can be bonded, and the threaded section and the extending section can be threaded, thereby ensuring the firmness of the connection between the actuating pin and the actuating block, avoiding the original bonding structure, which is easy to loosen and cannot guarantee the actuation effect.

[0025] 4. The present invention provides a star-rocket separation unlocking actuator, the slot is a V-shaped slot, and the bottom of the slot is rounded; the V-shaped design has a certain anti-deformation ability and ensures sufficient rigidity during assembly. In addition, the slot only needs to ensure the guiding function, the purpose is to prevent a large relative rotation during the actuation process, and ensure the stable actuation of the memory alloy wire. Therefore, the slot opening accuracy is not required to be high, and conventional processing machine tools and cutting tools can be easily completed, which greatly reduces the manufacturing cost, reduces the difficulty of assembly, and improves the yield rate and product reliability.

[0026] 5. The present invention provides a satellite-rocket separation unlocking actuator, in which the corners of the transverse groove and the longitudinal groove are rounded; the corners of the joint are rounded to ensure that the bending coefficient of the memory alloy wire is small enough to ensure that it does not bend and fail during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1This is a schematic diagram of the structure of the satellite-rocket separation and unlocking actuator of the present invention (stereoscopic diagram);

[0029] Figure 2 for Figure 1 Exploded diagram of

[0030] Figure 3 It is a structural schematic diagram (stereoscopic diagram) of the housing described in the present invention;

[0031] Figure 4 This is a schematic diagram of the structure of the satellite-rocket separation and unlocking actuator of the present invention (stereoscopic diagram, with the outer shell removed);

[0032] Figure 5 It is a structural schematic diagram (stereoscopic diagram) of the actuating block of the present invention;

[0033] Figure 6 This is a schematic diagram (stereoscopic diagram) of the assembly structure of the guide column, circuit board, and support sleeve of the present invention;

[0034] Description of reference numerals:

[0035] 1. Shell; 101. Actuating pin perforation; 102. Position limiting mounting groove; 103. Mounting hole; 2. Tail cover; 201. Second perforation; 3. Position limiting mounting plate; 301. First perforation; 4. Circuit board; 5. Support sleeve; 6. Power connector; 7. Guide column; 71. Slot; 8. Actuating block; 81. Mounting section; 811. Connecting hole; 812. Horizontal groove; 813. Vertical groove; 82. Guide section; 821. Extension groove; 9. Memory alloy wire; 10. Elastic member; 11. Actuating pin; 12. Connecting flange. DETAILED DESCRIPTION

[0036] like Figure 1 , Figure 2 , Figure 3As shown, a star-rocket separation unlocking actuator provided in this embodiment includes a shell 1 and a tail cover 2. A receiving cavity is provided inside the shell 1. An actuating pin through hole 101 communicating with the receiving cavity for the actuating pin to pass through is provided at one end of the shell 1. A limiting mounting groove 102 is provided at the other end of the shell 1. A mounting hole 103 communicating with the receiving cavity is provided at the bottom of the limiting mounting groove 102. The limiting mounting groove 102 is sequentially embedded in a limiting mounting plate 3, a circuit board 4 and a supporting sleeve 5. A power connector 6 is installed in the supporting sleeve 5. The power connector 6 is fixedly connected to the shell 1 through the tail cover 2. A limiting mounting plate 3 is provided on the limiting mounting plate 3, extending toward the inside of the receiving cavity. The guide column 7 extends outward, and also includes an actuating block 8 in frictional contact with the inner wall of the accommodating cavity. An actuating pin 11 is installed on the actuating block 8. One end of the actuating pin 11 extends from the actuating pin through hole 101 to the outside of the housing 1. The actuating block 8 is slidably connected with the guide column 7. A memory alloy wire 9 for driving the actuating block 8 to move is hung on the actuating block 8. Both ends of each memory alloy wire 9 extend outward and pass through the limit mounting plate 3 and the circuit board 4 in sequence and are fixed to the circuit board 4; an elastic member 10 is provided between the limit mounting plate 3 and the actuating block 8, and the elastic member 10 is covered with the memory alloy wire 9, and both ends of the elastic member 10 respectively abut against the limit mounting plate 3 and the actuating block 8.

[0037] The present invention provides a star-rocket separation and unlocking actuator, in which a limit mounting plate 3 is installed in a limit mounting groove 102, and a guide column 7 of the limit mounting plate 3 extends into the accommodating chamber of the outer shell 1 and is slidably connected to an actuating block 8, and an outer wall of the actuating block 8 is frictionally connected to an inner wall of the accommodating chamber of the outer shell 1. An actuating pin 11 is installed on the actuating block 8, and the actuating pin 11 passes through an actuating pin through-hole 101. After the memory alloy wire 9 is energized, it shrinks by self-heating, and can drive the actuating block 8 to move along the guide column 7 toward the limit mounting plate 3, compressing the elastic part 10 to complete the actuation; after the memory alloy wire 9 is powered off, the memory alloy wire 9 cools and stretches, and under the action of the elastic part 10, the actuating pin 11 can be reset, and through the above process, the actuating action of the actuating pin 11 can be completed. The above structural design can ensure the accuracy of the structural connection between the guide column 7 and the actuating block 8 and the structural accuracy between the guide column 7 and the housing 1 during the processing, so as to complete the actuation action. It is not necessary to ensure the structural accuracy between the guide column 7, the actuating block 8 and the housing 1 at the same time, which reduces the requirements for the processing tool, has low preparation cost and high yield rate. In addition, the above structure is simple and easy to assemble.

[0038] Both ends of each memory alloy wire 9 of the present invention extend outward and pass through the limit mounting plate 3 and the circuit board 4 in sequence and are fixedly connected to the circuit board 4. Both ends of each memory alloy wire 9 must pass through the circuit board 4 to ensure the firmness of the connection between each memory alloy wire 9 and the circuit board.

[0039] The machined surfaces of the actuating block 8, guide column 7, limit mounting plate 3 and support sleeve 5 of the present invention are basically external machined surfaces, and the internal machined surfaces only have the matching parts of the actuating block 8 and the actuating pin 11. The machined surfaces of the actuating block 8, guide column 7, limit mounting plate 3 and support sleeve 5 are all simple shapes, which are convenient for processing.

[0040] The support sleeve 5 of the present invention is divided into two parts, and the support sleeve 5 includes a first petal and a second petal that match each other, which is convenient for installation and disassembly. The support sleeve 5 can compact the circuit board and provide strong support for the power connector to avoid damage to the power connector.

[0041] The tail cover 2 of the present invention includes a cover plate, a first end surface of the cover plate is provided with a docking groove for docking with the housing 1, a second through hole 201 penetrating the cover plate is provided in the docking groove, and an inner wall of the docking groove is provided with an internal thread; the second through hole 201 can ensure the outlet of the power connector 6.

[0042] like Figure 4 , Figure 5 As shown, the actuating block 8 provided in this embodiment includes a cylindrical mounting section 81, a connecting hole 811 for mounting the actuating pin 11 and penetrating the mounting section 81 is provided at the center point of the mounting section 81, a transverse groove 812 is symmetrically provided along the connecting hole 811 on one end surface of the mounting section 81, a longitudinal groove 813 penetrating the two ends of each transverse groove 812 is provided on the outer wall of the mounting section 81, and the two ends of each longitudinal groove 813 in the length direction penetrate the two corresponding end surfaces of the mounting section 81, and a guide section 82 is provided along the circumference of the connecting hole 811 on one end surface of the mounting section 81 without a transverse groove, and each guide section 82 corresponds to the longitudinal groove 813 on the axis one by one, and an extension groove 821 corresponding to the longitudinal groove 813 is provided on the outer wall of each guide section 82, one end of the extension groove 821 penetrates the longitudinal groove 813, and the other end penetrates the end surface of the guide section 82; a slot 71 corresponding to the guide section 82 is provided on the outer wall of the guide column 7, and the two ends of each slot 71 in the length direction respectively penetrate the two end surfaces of the guide column 7.

[0043] The depth of the transverse groove 812 and the longitudinal groove 813 of the present invention is more than twice that of the memory alloy wire, which can ensure that the memory alloy wire does not contact the elastic member during operation. The elastic member of the present invention is a spring.

[0044] The length of the transverse groove 812 of the present invention is 2 / 3 of the length of the installation section 81, which can provide a larger contact area between the memory alloy wire and the installation section 81, ensure that the pressure of the memory alloy wire on the actuating block 8 is sufficiently small at high temperature, and ensure that the actuating block 8 is not damaged after repeated use.

[0045] The present invention designs a mounting section 81 through the structural design of the actuating block 8. The mounting section 81 can interact with the housing 1 and move along a straight line. The guide section 82 can be plugged into the guide column 7 and can move on the guide column 7. Both ends of the actuating block are guided to ensure the stability of the movement of the actuating block. The design of the transverse groove, the longitudinal groove and the extension groove can facilitate the connection between the memory alloy wire and the actuating block. The transverse groove, the longitudinal groove and the extension groove must have a certain depth to avoid leakage of the memory alloy wire, to ensure that the memory alloy wire is not worn, and to ensure the shrinkage effect and service life of the memory alloy wire.

[0046] The connecting hole 811 of the present embodiment includes an embedded section and a threaded section, the inner wall of the threaded section is provided with an internal thread, and the inner diameter of the embedded section is larger than the inner diameter of the threaded section; the actuating pin 11 includes a glued section tightly embedded in the embedded section, an extended section threadedly connected to the threaded section, and an extended section extending to the outside of the connecting hole 811, and the diameter of the glued section is greater than the diameter of the extended section and the diameter of the extended section; through the above-mentioned structural design, after the actuating pin and the actuating block are assembled, a mixed connection mode of screw connection and glue connection can be realized, the embedded section and the glued section can be glued, and the threaded section and the extended section can be screwed, thereby ensuring the firmness of the connection between the actuating pin and the actuating block, avoiding the original bonding structure, which is easy to loosen and cannot guarantee the actuation effect.

[0047] The slot 71 of the present invention is a V-shaped slot, and the bottom of the slot 71 is rounded; the V-shaped design has a certain anti-deformation ability and ensures sufficient rigidity during assembly. In addition, the slot 71 only needs to ensure the guiding function, and the purpose is to place it in the actuation process, so that a large relative rotation occurs to ensure the stable actuation of the memory alloy wire. Therefore, the opening accuracy of the slot 71 is not required to be high, and conventional processing machine tools can easily complete it, which greatly reduces the manufacturing cost and assembly difficulty.

[0048] The corners of the connection between the transverse groove 812 and the longitudinal groove 813 of the present invention are rounded; the corners of the connection are rounded to ensure that the bending coefficient of the memory alloy wire is small enough to ensure that it will not bend and fail during use.

[0049] like Figure 6 As shown, the limiting mounting plate 3 of the present embodiment is provided with a first through hole 301 for the memory alloy wire 9 to pass through, and the side walls of each first through hole 301 are connected with the side wall of the limiting mounting plate 3; the design of the first through hole 301 facilitates the passing of the memory alloy wire 9, and at the same time, the side walls of each first through hole 301 are connected with the side wall of the limiting mounting plate 3, which can accommodate the raised solder joints formed after the circuit board is welded.

[0050] The outer wall of the tail of the shell 1 of the present invention is provided with an external thread, the inner wall of the tail cover 2 is provided with an internal thread, and the tail cover 2 is screwed and fixed to the shell 1. Through the above design, the tail cover 2 and the shell 1 are screwed and fixed, which is convenient for installation and can ensure the connection strength.

[0051] A polygonal embedding groove is provided at one end of the support sleeve 5 of the present invention, and a polygonal flange matching the polygonal embedding groove is circumferentially arranged on the outer wall of the power connector 6, which is convenient for installation. At the same time, the polygonal design can prevent the power connector from rotating and ensure a stable effect.

[0052] The housing 1 , the limit mounting plate 3 , the support sleeve 5 , the guide column 7 and the actuating block 8 of the present invention are all made of insulating materials; a connecting flange 12 is circumferentially provided on the outer wall of the housing 1 .

[0053] The longitudinal cross section of the position limiting installation groove 102 of the present invention is a polygon, which can limit the position limiting installation plate to prevent circumferential rotation. At the same time, the notch of the position limiting installation groove 102 is relatively large, which is convenient for processing.

[0054] The position limiting mounting plate 3 and the guide column 7 of the present invention are integrally formed, which can ensure the rigidity of the guide column 7.

[0055] Assembly process of the rocket-satellite separation unlocking actuator:

[0056] 1) Assemble the actuating pin 11 and the actuating block 8. The actuating pin 11 and the actuating block 8 are fixed by adhesive bonding and screwing;

[0057] 2) Two memory alloy wires 9 are hung on the corresponding transverse grooves 812 of the actuating block 8, and both ends of each memory alloy wire 9 extend out along the longitudinal grooves 813 and the extension grooves 821;

[0058] 3) The circuit board 4 is fixedly connected to the limit mounting plate 3, the elastic member 10 is covered on the guide column 7, the actuating block 8 is assembled with the guide column 7, and both ends of the memory alloy wire 9 are passed through the first through hole 301 on the limit mounting plate 3 and welded to the circuit board;

[0059] 4) Weld the power connector to the circuit board, and cover the power connector with the support sleeve 5 to obtain the inner core assembly;

[0060] 5) Assemble the inner core assembly with the outer shell 1 and fix it with the outer shell 1 through the tail cover 2.

[0061] 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 satellite-rocket separation unlocking actuator, characterized in that: The invention comprises a housing (1) and a tail cover (2), wherein a receiving cavity is provided inside the housing (1), an actuating pin through hole (101) communicating with the receiving cavity and for the actuating pin to pass through is provided at one end of the housing (1), a position limiting installation groove (102) is provided at the other end of the housing (1), and a mounting hole (103) communicating with the receiving cavity is provided at the bottom of the position limiting installation groove (102); The limit installation groove (102) is embedded in the limit installation plate (3), the circuit board (4) and the support sleeve (5) in sequence, and a power connector (6) is installed in the support sleeve (5), and the power connector (6) is fixedly connected to the housing (1) through the tail cover (2); The limit mounting plate (3) is provided with a guide column (7) extending toward the interior of the accommodating cavity, and also includes an actuating block (8) in frictional contact with the inner wall of the accommodating cavity, an actuating pin (11) is mounted on the actuating block (8), one end of the actuating pin (11) extends from the actuating pin through hole (101) to the outside of the housing (1), the actuating block (8) is slidably connected to the guide column (7), a memory alloy wire (9) for driving the actuating block (8) to move is hung on the actuating block (8), and both ends of each memory alloy wire (9) extend outwards and sequentially pass through the limit mounting plate (3) and the circuit board (4) and are fixedly connected to the circuit board (4); An elastic member (10) is provided between the limit mounting plate (3) and the actuating block (8), the elastic member (10) is covered with a memory alloy wire (9), and two ends of the elastic member (10) respectively abut against the limit mounting plate (3) and the actuating block (8); The actuating block (8) comprises a cylindrical mounting section (81), a connecting hole (811) penetrating the mounting section (81) and used for installing an actuating pin (11) is provided at a center point of the mounting section (81), transverse grooves (812) are symmetrically provided along the connecting hole (811) on one end surface of the mounting section (81), longitudinal grooves (813) penetrating the two ends of each transverse groove (812) are provided on the outer wall of the mounting section (81), and the two ends of each longitudinal groove (813) penetrate the two end surfaces corresponding to the mounting section (81) in the length direction, and a guide section (82) is provided on one end surface of the mounting section (81) without a transverse groove along the circumference of the connecting hole (811), and each guide section (82) corresponds to the longitudinal groove (813) on the axis one by one, and an extension groove (821) corresponding to the longitudinal groove (813) is provided on the outer wall of each guide section (82), and one end of the extension groove (821) penetrates the longitudinal groove (813), and the other end penetrates the end surface of the guide section (82); The outer wall of the guide column (7) is provided with slots (71) corresponding to the guide sections (82), and the two ends of each slot (71) in the length direction respectively penetrate the two end surfaces of the guide column (7); the connecting hole (811) comprises an embedded section and a screw-connected section, the inner wall of the screw-connected section is provided with an internal thread, and the inner diameter of the embedded section is larger than the inner diameter of the screw-connected section; the actuating pin (11) comprises a glued section tightly embedded in the embedded section, an extended section screwed to the screw-connected section, and an extended section extending outside the connecting hole (811), and the diameter of the glued section is greater than the diameter of the extended section and greater than the diameter of the extended section.

2. The satellite-rocket separation unlocking actuator according to claim 1, characterized in that: The slot (71) is a V-shaped slot, and the bottom of the slot (71) is rounded.

3. The satellite-rocket separation unlocking actuator according to claim 2, characterized in that: The joints between the transverse groove (812) and the longitudinal groove (813) are rounded.

4. The satellite-rocket separation unlocking actuator according to claim 1, characterized in that: The limiting installation plate (3) is provided with a first through hole (301) for the memory alloy wire (9) to pass through, and the side wall of each first through hole (301) is connected to the side wall of the limiting installation plate (3).

5. The satellite-rocket separation unlocking actuator according to claim 1, characterized in that: The outer wall of the rear portion of the outer shell (1) is provided with an external thread, the inner wall of the tail cover (2) is provided with an internal thread, and the tail cover (2) is screwed and fixed to the outer shell (1).

6. The satellite-rocket separation unlocking actuator according to claim 1, characterized in that: The supporting sleeve (5) is arranged in a split form, and the supporting sleeve (5) comprises a first petal and a second petal that are matched.

7. The satellite-rocket separation unlocking actuator according to claim 1, characterized in that: A polygonal embedding groove is provided at one end of the support sleeve (5), and a polygonal flange matching the polygonal embedding groove is circumferentially provided on the outer wall of the power connector (6).

8. The satellite-rocket separation unlocking actuator according to claim 1, characterized in that: The housing (1), the limit mounting plate (3), the support sleeve (5), the guide column (7) and the actuating block (8) are all made of insulating materials; and a connecting flange (12) is provided in the circumferential direction of the outer wall of the housing (1).

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