Large bearing, low impact automatic reset reusable point type connection and separation actuating structure

Abstract

The application discloses a large-bearing and low-impact automatic reset reusable point type connection and separation actuating structure. The application discloses a reusable point type connection and separation actuating mechanism driven by a pyrotechnic gas source, which adopts a nut and bolt engagement mechanism to realize large-tonnage bearing, adopts a pressure isolation and filtration structure to realize impact reduction of the pyrotechnic gas source, adopts an in-place pressure relief structure to realize an automatic reset function in cooperation with a spring actuating balance, and adopts a conical structure to realize a shear resistance function. The device structure has the advantages of high connection efficiency, small separation impact, automatic reset and shear resistance.

Description

Technical Field

[0001] This invention relates to the technical field of spacecraft structures, and in particular to a high-load, low-impact, automatically reset, reusable point-connected separation actuation structure. Background Technology

[0002] Aerospace structures encompass various scenarios requiring connection, separation, and thrust functions, including separation of spacecraft / rocket, separation of inter-stage structures, and deployment of wing and rudder structures. As the weight of aerospace payloads increases, the demand for structural connection tonnage becomes increasingly urgent; simultaneously, the development and application of commercial aerospace places higher demands on the low cost and reusability of structural mechanisms.

[0003] Due to the relatively weak strength of the separation structure or the sensitivity of nearby equipment components, there is a need for applications requiring weak impact resistance. Previously, strong-connection explosive bolts and similar methods were used, but this involved multiple devices working in coordination, complex timing controls for unlocking and pushing actions, a complex system composition, large installation space, heavy weight, low reliability, and issues with the devices having large impact forces and being designed for single-use applications. Summary of the Invention

[0004] This invention provides a high-load, low-impact, reusable point-type connection and separation actuation structure with automatic reset. This structure is a reusable point-type connection and separation actuation mechanism driven by pyrotechnic gas. It adopts a nut and bolt meshing mechanism to achieve high tonnage load, a pressure isolation and filtration structure to reduce the impact at the pyrotechnic gas source, a pressure relief structure combined with spring actuation balance to achieve automatic reset function, and a conical structure to achieve shear resistance.

[0005] In the first aspect, a high-load-bearing, low-impact, automatically reset, reusable point-type connection and separation actuation structure is provided, including bolts, base body, pressure ring, nut, first piston cylinder, piston rod, second piston cylinder, housing, spring, and gas generator; the separation actuation structure is used to realize the separation actuation of connected part a and connected part b;

[0006] The pressure ring is a rotating structure used to connect with the connected part a; the center of the pressure ring has a through hole, and one side of the through hole has a stepped hole, which is used for positioning and mounting the base.

[0007] The substrate has a first recessed groove away from the connected component b, and a second recessed groove near the connected component b. The first and second recessed grooves are connected through a central through-hole in the substrate.

[0008] The housing passes through the through hole of the pressure ring and is set in the first recess of the base; the outer periphery of the housing is threadedly engaged with the inner side of the first recess of the base;

[0009] The second recess of the base is used for positioning and installing the bolt; the first end of the bolt is connected to the connected part b; the stepped part of the bolt abuts against the bottom of the second recess; the second end of the bolt passes through the central through hole of the base.

[0010] The nut has a split structure, and a first piston cylinder is also provided inside the housing in addition to the nut. When the separation mechanism is locked, the second end of the bolt engages with the nut in the housing. The outer circle of the nut is constrained and supported by the inner wall of the first piston cylinder. When the separation mechanism is unlocked, the nut is disengaged from the threaded connection with the bolt, and the outer circle of the nut is released from the support engagement with the inner wall of the first piston cylinder.

[0011] In addition to the nut and the first piston cylinder, the housing also includes a piston rod, a second piston cylinder, and a spring; the second piston cylinder has a rotating structure; the first end of the second piston cylinder is threadedly connected to the first piston cylinder; the housing has a mounting part protruding inward at the end away from the bolt, and the spring is sleeved on the outer periphery of the mounting part of the housing and abuts against the end face of the second end of the second piston cylinder; the second end of the second piston cylinder has a through hole in the center, and the mounting part of the housing is inserted into the through hole in the center of the second end of the second piston cylinder, and the connection is sealed by a sealing ring;

[0012] The piston rod is disposed inside the second piston cylinder and is movable relative to the second piston cylinder; the housing has a through hole at the end away from the bolt, penetrating the mounting portion; the mounting portion of the piston rod facing the housing has a gas receiving cavity; the gas generator is fixed at the end of the housing away from the bolt and is used to blow gas into the gas receiving cavity of the piston rod through the through hole of the mounting portion; the outer periphery of the piston rod is sealed to the inner wall of the second piston cylinder by a sealing ring; the opening size of the gas receiving cavity of the piston rod is larger than the diameter of the central through hole at the second end of the second piston cylinder.

[0013] In conjunction with the first aspect, in some implementations of the first aspect, when the separation actuation structure is in the locked state, the first end of the piston rod abuts against the second end face of the bolt, and the second end of the piston rod abuts against the inner end face of the second end of the second piston cylinder; the gas output from the gas generator enters the gas receiving chamber of the piston rod through the through hole of the housing mounting part; the thrust of the gas acts on the inner end face of the second end of the second piston cylinder; the spring is compressed under the force of the gas, and the second piston cylinder pulls the first piston cylinder away from the bolt to release the support constraint between the first piston cylinder and the nut, thereby unlocking the separation actuation structure;

[0014] When the separation mechanism is in the unlocked state, the piston rod moves relative to the second piston cylinder under the action of the gas generator, and pushes the bolt, thereby separating the connected parts a and b.

[0015] In conjunction with the first aspect, in some implementations of the first aspect, the side wall of the second piston cylinder has a pressure relief hole, which is located at the end of the piston rod's stroke. When the pressure inside the sealed cavity formed by the piston rod, the second piston cylinder, and the housing is less than the spring force, the second piston cylinder pushes the first piston cylinder to reset under the action of the spring, thereby restoring the first piston cylinder's reset and constraint on the nut and realizing the automatic reset function of the structure.

[0016] In conjunction with the first aspect, in some implementations of the first aspect, the inner side of the first piston cylinder has a first piston ring rib and a second piston ring rib along the axial direction; the outer periphery of the nut has a first nut ring rib and a second nut ring rib along the axial direction.

[0017] When the separation actuation structure is in the locked state, the first piston ring rib of the first piston cylinder and the first nut ring rib of the nut are supported and constrained, and the second piston ring rib of the first piston cylinder and the second nut ring rib of the nut are supported and constrained.

[0018] When the separation actuation structure is in the unlocked state, the first piston ring rib of the first piston cylinder separates from the first nut ring rib of the nut and falls into the space between the first nut ring rib and the second nut ring rib of the nut; the second nut ring rib of the nut separates from the second piston ring rib of the first piston cylinder and falls into the space between the first piston ring rib and the second piston ring rib of the first piston cylinder.

[0019] In conjunction with the first aspect, in some implementations of the first aspect, the first piston ring rib of the first piston cylinder has a chamfer on the side facing the bolt, the second piston ring rib of the first piston cylinder has a chamfer on the side facing the bolt, the first nut ring rib of the nut has a chamfer on the side away from the bolt, and the second nut ring rib of the nut has a chamfer on the side away from the bolt.

[0020] In conjunction with the first aspect, in some implementations of the first aspect, the inner side of the first piston cylinder also has a third piston ring rib. The third piston ring rib is located on the side of the second piston ring rib away from the bolt. The third piston ring rib achieves nut positioning through the end face facing the bolt. The third piston ring rib achieves piston rod movement guidance through the inner wall. The third piston ring rib achieves piston rod positioning braking through the end face away from the bolt.

[0021] In conjunction with the first aspect, in some implementations of the first aspect, the outer structure of the base is a conical structure, and the shear resistance and positioning and anti-misalignment functions of the connected part a are achieved through the cylindrical part and the conical part.

[0022] In conjunction with the first aspect, in some implementations of the first aspect, the separation actuation structure also includes a shock-absorbing ring; the shock-absorbing ring is installed between the housing and the second piston cylinder; a rubber energy-absorbing damping material is used to reduce the shock and impact of the second piston cylinder hitting the housing under the action of the gas generator.

[0023] In conjunction with the first aspect, in some implementations of the first aspect, the separation actuation structure also includes a pressure-isolating mesh; the pressure-isolating mesh is installed on the housing and located at the front end of the gas outlet of the gas generator; the pressure-isolating mesh is made of green honeycomb pressure-isolating material, which plays the role of pressure isolation and filtration of high-pressure gas.

[0024] In conjunction with the first aspect, in some implementations of the first aspect, the separate actuation structure is also used for equivalent simulation test verification:

[0025] The equivalent translational carriage of the connected component a is used to verify the equivalence by fixing the connected component b. The equivalent translational carriage is designed in combination with the mass, center of mass, modulus, translational resistance or rotation radius of the connected component a.

[0026] The purpose of this invention is to overcome the problems of low load-bearing capacity and large working impact of existing technologies, and to propose a reusable point-type connection and separation actuation structure with large tonnage load-bearing capacity, low impact separation and automatic reset, which solves the problems of low connection efficiency, large separation impact and inability to be reused.

[0027] The purpose of this invention is to overcome the problems of low connection efficiency, significant separation impact, and inability to reuse existing technologies. It proposes a method that achieves high tonnage load by using a nut and bolt meshing mechanism, reduces the impact at the source of pyrotechnic gases by using a pressure isolation and filtration structure, achieves automatic reset function by using a pressure relief structure in conjunction with spring dynamic balancing, and achieves shear resistance by using a conical structure.

[0028] Compared with the prior art, the solution provided by the present invention has at least the following beneficial technical effects:

[0029] (1) High connection efficiency. It adopts a multi-lobed nut and bolt structure, and achieves high load-bearing capacity through the connection thread, resulting in high connection efficiency.

[0030] (2) The unlocking impact is small. The reverse pull unlocking and direct push-impact mechanism are used to achieve the opposite direction of unlocking and pushing. The source vibration reduction and path impact reduction are achieved by using the damping ring and pressure isolation net.

[0031] (3) Automatic reset: The structure can be automatically reset after operation by using structural limit and gas pressure relief, thereby improving the reusability of the product. Attached Figure Description

[0032] Figure 1 This is a structural outline drawing.

[0033] Figure 2 This is a sectional view of the structural connection.

[0034] Figure 3 This is a schematic diagram of the structural connection and installation.

[0035] Figure 4 Unlock the sectional view for the structure.

[0036] Figure 5 This is a sectional view of the structure.

[0037] Figure 6 This is a sectional view of the structure after restoration.

[0038] Figure 7 This is a schematic diagram of a tapered shear-resistant structure.

[0039] Figure 8 This is a schematic diagram of a pressure-reducing filter structure.

[0040] Figure 9 This is a schematic diagram of the structural equivalence simulation test verification platform. Detailed Implementation

[0041] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0042] like Figure 1 As shown, this invention provides a reusable point-type connection and separation actuation structure with high tonnage load-bearing capacity, low impact separation, and automatic reset capability. For example... Figure 2 As shown, the separate actuation structure includes bolt 1, base 2, pressure ring 3, nut 4, first piston cylinder 5, piston rod 6, second piston cylinder 7, housing 8, spring 9, and gas generator 12. Figure 3 As shown, the separation actuation structure is used to achieve the separation actuation of connected component a and connected component b.

[0043] The pressure ring 3 is a rotating structure used to connect with the connected part a via a threaded connector. The pressure ring 3 has a through hole at its center, and a stepped hole on one side of the through hole, which is used for positioning and mounting the base 2.

[0044] The base 2 has a first recess near the connected component b and a second recess near the connected component b. The first and second recesses are connected through a central through-hole in the base 2. The housing 8 passes through the through-hole of the pressure ring 3 and is positioned in the first recess of the base 2. The outer periphery of the housing 8 is threaded into the inner side of the first recess of the base 2, forming a closed structure. The second recess of the base 2 is used for the positioning and installation of the bolt 1. The bolt 1 is a double-ended stud. The first end of the bolt 1 is connected to the connected component b through a thread. The stepped portion of the bolt 1 abuts against the bottom of the second recess, achieving preload loading. The second end of the bolt 1 passes through the central through-hole in the base 2, and when the separation mechanism is locked, the second end of the bolt 1 engages with the nut 4 in the housing 8. The second end of the bolt 1 achieves connection through the engagement mechanism of the nut 4. The lower end face of the nut 4 engages with the bottom of the first recess of the base 2 to form sliding, guiding, and positioning.

[0045] Nut 4 has a split structure with internal connecting threads and external supporting ring ribs, and can be divided into three-lobed or four-lobed structures. In addition to nut 4, the housing 8 also contains a first piston cylinder 5. For example... Figure 2 As shown, when the disengagement mechanism is in the locked state, the internal thread of the nut 4 is connected to the bolt 1, and the outer circle of the nut 4 is constrained and supported by the inner wall of the first piston cylinder 5. Figure 4 As shown, when the separation actuation structure is in the unlocked state, the nut 4 is disengaged from the threaded connection with the bolt 1, and the outer circle of the nut 4 is released from the support engagement with the inner wall of the first piston cylinder 5.

[0046] The first piston cylinder 5 has a first piston ring rib, a second piston ring rib, and a third piston ring rib along its inner side in the axial direction. The nut 4 has a first nut ring rib and a second nut ring rib along its outer periphery in the axial direction. The first piston cylinder 5 constrains the nut 4 through the first piston ring rib and the second piston ring rib. The two ring ribs of the first piston ring rib and the second piston ring rib use their inner diameter and the third piston ring rib above them to position the nut 4 through the end face. At the same time, the third piston ring rib guides the movement of the piston rod 6 and provides braking when it reaches its position.

[0047] like Figure 2 As shown, when the separation actuation structure is in the locked state, the first piston ring rib of the first piston cylinder 5 is supported and constrained by the first nut ring rib of the nut 4, and the second piston ring rib of the first piston cylinder 5 is supported and constrained by the second nut ring rib of the nut 4.

[0048] like Figure 4 As shown, when the separation actuation structure is in the unlocked state, the first piston ring rib of the first piston cylinder 5 disengages from the first nut ring rib of the nut 4 and falls into the space between the first nut ring rib and the second nut ring rib of the nut 4; the second nut ring rib of the nut 4 disengages from the second piston ring rib of the first piston cylinder 5 and falls into the space between the first piston ring rib and the second piston ring rib of the first piston cylinder 5.

[0049] In addition to the nut 4 and the first piston cylinder 5, the housing 8 also includes a piston rod 6, a second piston cylinder 7, and a spring 9. The second piston cylinder 7 is a rotating structure. The first end of the second piston cylinder 7 is threadedly connected to the first piston cylinder 5. A mounting portion protrudes inward from the end of the housing 8 away from the bolt 1. The spring 9 is sleeved on the outer periphery of the mounting portion of the housing 8 and abuts against the end face of the second end of the second piston cylinder 7. The spring 9 provides support for the installation and positioning of the second piston cylinder 7. The second end of the second piston cylinder 7 has a through hole at its center. The mounting portion of the housing 8 is inserted into the center through hole of the second end of the second piston cylinder 7, and a sealing connection is achieved through a sealing ring 13.

[0050] The piston rod 6 is disposed within the second piston cylinder 7. The housing 8 has a through-hole penetrating the mounting portion at the end away from the bolt 1. The mounting portion of the piston rod 6 facing the housing 8 has a gas-receiving cavity. The gas generator 12 is threaded to the end of the housing 8 away from the bolt 1 and is used to blow gas into the gas-receiving cavity of the piston rod 6 through the through-hole penetrating the mounting portion. The pyrotechnic gas generated by the gas generator 12 serves as the power source for the structure. The housing 8 and the gas generator 12 achieve end-face sealing through a sealing ring 13. The outer periphery of the piston rod 6 is sealed to the inner wall of the second piston cylinder 7 through the sealing ring 13. The opening size of the gas-receiving cavity of the piston rod 6 is larger than the diameter of the central through-hole at the second end of the second piston cylinder 7.

[0051] like Figure 2 and Figure 4 As shown, when the separation actuation structure is locked, the first end of the piston rod 6 abuts against the second end face of the bolt 1, and the second end of the piston rod 6 abuts against the inner end face of the second end of the second piston cylinder 7. The gas output from the gas generator 12 enters the gas receiving chamber of the piston rod 6 through the through hole of the mounting part of the housing 8. Since the axial position of the piston rod 6 is still constrained by the bolt 1, the thrust of the gas acts on the inner end face of the second end of the second piston cylinder 7. The spring 9 is compressed under the force of the gas, and the second piston cylinder 7 pulls the first piston cylinder 5 away from the bolt 1 to release the support constraint between the first piston cylinder 5 and the nut 4, thereby unlocking the separation actuation structure. In other words, the gas generator 12 releases the constraint on the nut 4 by moving the position of the first piston cylinder 5, thus releasing the bolt 1.

[0052] like Figure 5 As shown, when the separation actuation structure is in the unlocked state, the piston rod 6 can move relative to the second piston cylinder 7 under the action of the gas generator 12, and at the same time, under the action of the gas generator 12, it can push the bolt 1, thereby separating the connected parts a and b.

[0053] The side wall of the second piston cylinder 7 has a pressure relief hole, which is located at the end of the stroke of the piston rod 6. That is, as the piston rod 6 is about to finish its stroke in the second piston cylinder 7, it can pass through the pressure relief hole, allowing the gas in the gas receiving chamber of the piston rod 6 to begin to release pressure through the hole. Figure 6 As shown. When the pressure inside the sealed cavity formed by the piston rod 6, the second piston cylinder 7, and the housing 8 is less than the elastic force of the spring 9, the spring 9 serves as the power source for automatic reset. Under the action of the spring 9, the second piston cylinder 7 pushes the first piston cylinder 5 to reset. Utilizing the matching chamfer structure between the first piston ring ribs and the second piston ring ribs of the first piston cylinder 5 and the first and second nut ring ribs of the nut 4, the first piston cylinder 5 resets and constrains the nut 4, thus realizing the automatic reset function of the structure.

[0054] In some embodiments, such as Figure 7As shown, the outer structure of the base 2 is a conical structure, which achieves shear resistance and positioning to prevent misalignment with the connected part a through the cylindrical and conical parts.

[0055] In some embodiments, the separation actuation structure further includes a shock-absorbing ring 10. The shock-absorbing ring 10 is installed between the housing 8 and the second piston cylinder 7. It is made of rubber energy-absorbing damping material and serves to reduce shock and impact when the second piston cylinder 7 impacts the housing 8 under the action of the gas generator 12.

[0056] In some embodiments, such as Figure 8 As shown, the separation actuation structure also includes a pressure-isolating mesh 11. The pressure-isolating mesh 11 is installed on the housing 8, located at the front end of the gas outlet of the gas generator 12. The pressure-isolating mesh 11 uses green honeycomb shock-absorbing material, serving to isolate and filter the high-pressure gas. Specifically, the pressure isolation reduces the impact vibration of the explosion shock generated by the operation of the gas generator 12 on the external structure through the piston rod 6 and bolt 1; the filtration prevents large particles of gunpowder residue generated by the operation of the gas generator 12 from entering the mechanism, improving the reliability of the piston mechanism for repeated use.

[0057] In summary, the working principle of the separation actuation structure provided by this invention is as follows: the gas generated by the gas generator 12 installed in the housing 8 is pressure-isolated and filtered by the pressure-isolation mesh 11, and then enters the sealed cavity formed by the piston rod 6, the second piston cylinder 7, and the housing 8. The gas drives the second piston cylinder 7 and the first piston cylinder 5 to move upward to the shock-absorbing ring 10. After the shock-absorbing ring 10 dampens and reduces impact, it moves the stepped end face of the housing 8. At this time, the first piston cylinder 5 releases the constraint on the nut 4, realizing the separation function of the structure. The nut 4 releases the radial constraint on the bolt 1 under the combined action of the preload of the bolt 1 and the sliding surface of the base 2.

[0058] Then, the gas-driven piston rod 6 continues to move downwards, pushing the bolt 1 to push the connected part b, thus realizing the structure's pushing and impacting function. When the piston rod 6 moves above the first piston cylinder 5 and is stopped by the third piston ring rib, the gas is depressurized through the pressure relief hole of the second piston cylinder 7.

[0059] When the pressure inside the sealed cavity formed by piston rod 6, second piston cylinder 7, and housing 8 is less than the elastic force of spring 9, first piston cylinder 5 and second piston cylinder 7 return to their original position under the action of spring 9. During the movement, the chamfered structure matching the inner ring rib of first piston cylinder 5 and the external environment of nut 4, as well as the limiting position of the end face of upper ring rib of first piston cylinder 5 and inner diameter of piston rod 6, re-realize the reset and constraint of nut 4 on first piston cylinder 5, thus realizing the automatic reset function of the structure. The installation and verification principle of this structure is mainly achieved through the connection of two connected parts. One end is connected by fasteners through pressure ring 3, and the other end is connected by the thread of bolt 1. At the same time, the tapered angle of the base 2 realizes the positioning and shear resistance of the two connected parts.

[0060] The principle of structural equivalent simulation test verification: During the equivalent simulation test verification, one of the connected components is equivalently simulated as a translational trolley. The other connected component is fixedly supported, and the trolley is propelled using the connection and pushing functions of this invention. The equivalent function and performance are verified by measuring the speed of the equivalent simulated translational trolley. The design of the equivalent simulated translational trolley needs to be comprehensively designed considering factors such as the mass, center of mass, modulus, translational resistance, or rotation radius of the connected components. Figure 9 The equivalent simulation test platform shown verifies that the structural performance meets the system usage requirements.

[0061] This invention presents a reusable point-type connection and separation actuation structure with high tonnage load capacity, low impact separation, and automatic reset capability. Driven by pyrotechnic gases, this reusable point-type connection and separation actuation mechanism employs a nut and bolt engagement mechanism for high tonnage load capacity, a pressure-reducing filter structure to lower the impact at the pyrotechnic gas source, a pressure relief structure combined with spring actuation for automatic reset, and a conical structure for shear resistance. This device structure offers advantages such as high connection efficiency, low separation impact, automatic reset capability, and shear resistance.

[0062] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope defined in the claims of the present invention.

Claims

1. A high-load-bearing, low-impact, automatically reset, reusable point-connected and disengaged actuation structure, characterized in that, Includes bolt (1), base (2), pressure ring (3), nut (4), first piston cylinder (5), piston rod (6), second piston cylinder (7), housing (8), spring (9), and gas generator (12); the separation actuation structure is used to realize the separation actuation of the connected part a and the connected part b; The pressure ring (3) is a rotating structure used to connect with the connected part a; the center of the pressure ring (3) has a through hole, and one side of the through hole has a stepped hole, which is used for positioning and mounting the base (2); The substrate (2) has a first groove on the side away from the connected part b, and a second groove on the side of the substrate (2) close to the connected part b. The first groove and the second groove are connected through the central through hole of the substrate (2). The housing (8) passes through the through hole of the pressure ring (3) and is set in the first recess of the base (2); the outer periphery of the housing (8) is threadedly engaged with the inner side of the first recess of the base (2); The second recess of the base (2) is used for the positioning and installation of the bolt (1); the first end of the bolt (1) is connected to the connected part b; the stepped part of the bolt (1) abuts against the bottom of the second recess; the second end of the bolt (1) passes through the central through hole of the base (2); The nut (4) has a split structure. In addition to the nut (4), the housing (8) also has a first piston cylinder (5). When the separation mechanism is locked, the second end of the bolt (1) engages with the nut (4) in the housing (8). The outer circle of the nut (4) is constrained and supported by the inner wall of the first piston cylinder (5). When the separation mechanism is unlocked, the nut (4) is disengaged from the threaded connection with the bolt (1), and the outer circle of the nut (4) is released from the support engagement with the inner wall of the first piston cylinder (5). In addition to the nut (4) and the first piston cylinder (5), the housing (8) is also provided with a piston rod (6), a second piston cylinder (7), and a spring (9); the second piston cylinder (7) is a rotating body structure; the first end of the second piston cylinder (7) is threadedly connected to the first piston cylinder (5); the housing (8) has a mounting part protruding inward at the end away from the bolt (1), and the spring (9) is sleeved on the outer periphery of the mounting part of the housing (8) and abuts against the end face of the second end of the second piston cylinder (7); the second end of the second piston cylinder (7) has a through hole in the center, and the mounting part of the housing (8) is inserted into the center through hole of the second end of the second piston cylinder (7) and sealed by a sealing ring (13); The piston rod (6) is disposed inside the second piston cylinder (7) and is movable relative to the second piston cylinder (7); the housing (8) has a through hole at the end away from the bolt (1) that penetrates the mounting part; the mounting part of the piston rod (6) facing the housing (8) has a gas receiving cavity; the gas generator (12) is fixed to the end of the housing (8) away from the bolt (1) and is used to blow gas into the gas receiving cavity of the piston rod (6) through the through hole that penetrates the mounting part; the outer periphery of the piston rod (6) is sealed to the inner wall of the second piston cylinder (7) by a sealing ring (13); the opening size of the gas receiving cavity of the piston rod (6) is larger than the diameter of the central through hole at the second end of the second piston cylinder (7); When the separation actuation structure is locked, the first end of the piston rod (6) abuts against the second end face of the bolt (1), and the second end of the piston rod (6) abuts against the inner end face of the second end of the second piston cylinder (7); the gas output by the gas generator (12) enters the gas receiving chamber of the piston rod (6) through the through hole of the housing (8) mounting part; the thrust of the gas acts on the inner end face of the second end of the second piston cylinder (7); the spring (9) is compressed under the action of the gas, and the second piston cylinder (7) pulls the first piston cylinder (5) away from the bolt (1) to release the support constraint between the first piston cylinder (5) and the nut (4), thereby unlocking the separation actuation structure; When the separation actuation structure is in the unlocked state, the piston rod (6) moves relative to the second piston cylinder (7) under the action of the gas generator (12) and pushes the bolt (1), thereby separating the connected parts a and b.

2. The separation actuation structure according to claim 1, characterized in that, The side wall of the second piston cylinder (7) has a pressure relief hole, which is located at the end of the stroke of the piston rod (6). When the pressure in the sealed cavity formed by the piston rod (6), the second piston cylinder (7) and the housing (8) is less than the elastic force of the spring (9), the second piston cylinder (7) pushes the first piston cylinder (5) to reset under the action of the spring (9), thereby restoring the first piston cylinder (5) to the nut (4) and realizing the automatic reset function of the structure.

3. The separation actuation structure according to claim 1, characterized in that, The inner side of the first piston cylinder (5) has a first piston ring rib and a second piston ring rib along the axial direction; the outer periphery of the nut (4) has a first nut ring rib and a second nut ring rib along the axial direction. When the separation actuation structure is in the locked state, the first piston ring rib of the first piston cylinder (5) is supported and constrained by the first nut ring rib of the nut (4), and the second piston ring rib of the first piston cylinder (5) is supported and constrained by the second nut ring rib of the nut (4). When the separation actuation structure is in the unlocked state, the first piston ring rib of the first piston cylinder (5) separates from the first nut ring rib of the nut (4) and falls into the space between the first nut ring rib and the second nut ring rib of the nut (4); the second nut ring rib of the nut (4) separates from the second piston ring rib of the first piston cylinder (5) and falls into the space between the first piston ring rib and the second piston ring rib of the first piston cylinder (5).

4. The separation actuation structure according to claim 3, characterized in that, The first piston ring rib of the first piston cylinder (5) has a chamfer on the side facing the bolt (1), the second piston ring rib of the first piston cylinder (5) has a chamfer on the side facing the bolt (1), the first nut ring rib of the nut (4) has a chamfer on the side away from the bolt (1), and the second nut ring rib of the nut (4) has a chamfer on the side away from the bolt (1).

5. The separation actuation structure according to claim 3, characterized in that, The inner side of the first piston cylinder (5) also has a third piston ring rib. The third piston ring rib is located on the side of the second piston ring rib away from the bolt (1). The third piston ring rib achieves the positioning of the nut (4) through the end face facing the bolt (1). The third piston ring rib achieves the movement guidance of the piston rod (6) through the inner wall. The third piston ring rib achieves the positioning braking of the piston rod (6) through the end face facing away from the bolt (1).

6. The separation actuation structure according to claim 1, characterized in that, The outer part of the base (2) is a conical structure, which achieves shear resistance and positioning and anti-misalignment functions with the connected part a through the cylindrical part and the conical part.

7. The separation actuation structure according to claim 1, characterized in that, The separation actuation structure also includes a shock-absorbing ring (10); the shock-absorbing ring (10) is installed between the housing (8) and the second piston cylinder (7); the shock-absorbing ring (10) is made of rubber energy-absorbing damping material, which plays a role in shock absorption and impact reduction when the second piston cylinder (7) impacts the housing (8) under the action of the gas generator (12).

8. The separation actuation structure according to claim 1, characterized in that, The separation actuation structure also includes a pressure-isolating mesh (11); the pressure-isolating mesh (11) is installed on the housing (8) and located at the front end of the gas outlet of the gas generator (12); the pressure-isolating mesh (11) is made of green honeycomb pressure-isolating material, which plays the role of pressure isolation and filtration of high-pressure gas.

9. The separation actuation structure according to claim 1, characterized in that, The separate actuation structure is also used for equivalent simulation test verification: The connected component a is equivalent to a translational trolley, and the connected component b is fixedly supported. The equivalence is verified by measuring the speed of the equivalent translational trolley. The equivalent translational trolley is designed in combination with the mass, center of mass, modulus, translational resistance or rotation radius of the connected component a.

Images