A multidirectional regulated very low impact maintenance-free point separation device

Abstract

A kind of multi-directional adjustment's very low impact maintenance-free point separation device, utilize connecting bolt to pass through bolt sleeve, lower connecting block, upper connecting block, realize the mechanism of thread connection ability by support ring, cylinder, split nut, base body composition is connected.The connecting bolt is connected by applying installation torque to outer hexagon, the structure of upper and lower two parts.Its unlocking working principle is that the working high-pressure gas of actuating gas source is acted on cylinder and piston through gas passage of inlet pipe base, cylinder and support ring compress the concave hexagonal lattice buffer structure and chiral four ligand lattice buffer structure under the action of high-pressure gas, when the radial constraint of support ring to split nut is removed, split nut is opened radially along the sliding surface of base under the action of piston, and the axial constraint of connecting bolt is removed.Connecting bolt is captured through the capture bushing under the action of capturer spring, and the connection of connecting bolt is realized.

Description

Technical Field

[0001] This invention relates to a multi-directional adjustable, very low-impact, maintenance-free point separation device, belonging to the field of spacecraft structure technology. Background Technology

[0002] As a critical component of spacecraft, the performance of the separation device directly affects the successful completion of the flight mission. The separation nut device, as one of the most commonly used pyrotechnic separation devices, has advantages such as high reliability, compact size, and lower impact response compared to traditional pyrotechnic separation devices like explosive bolts, and has been widely used in spacecraft satellite-rocket separation.

[0003] However, because the separation nut device is more complex in structure than traditional pyrotechnic separation devices such as explosive bolts, it can lead to many malfunctions during installation, use and maintenance, such as poor product performance or even failure to work, which can result in launch mission failure.

[0004] Meanwhile, with the rapid development of my country's aerospace engineering in recent years, the accuracy of modern satellite observation and positioning has gradually improved, and the types and quantities of precision instruments used in launch vehicles and satellites have increased. These high-precision instruments and equipment have increasingly stringent requirements for low-impact environments, requiring an impact response of no more than 1000g in the 4000Hz frequency domain. However, the impact response of existing traditional pyrotechnic point separation devices is generally no less than 5000g in the 4000Hz frequency domain, which cannot meet the low-impact requirements of precision instruments and equipment.

[0005] To address the issue of large impact response in existing traditional pyrotechnic point separation devices, common methods include adding buffer energy-absorbing devices along the impact path and reducing the charge amount. However, simply adopting one impact reduction method is insufficient to meet the requirement that the impact response should not exceed 1000g in the 4000Hz frequency range. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a multi-directional adjustable very low impact maintenance-free point separation device, so as to realize that the separation device is maintenance-free during installation, use and maintenance, and achieve a very low impact effect with a near-field impact response peak of no more than 600g in the 4000Hz frequency domain by taking a series of impact reduction measures.

[0007] The objective of this invention is achieved through the following technical solutions:

[0008] A multi-directional adjustable, very low-impact, maintenance-free point-type separation device includes a separation nut assembly, a catcher assembly, a connecting bolt, an upper connecting block, a lower connecting block, a shear cone sleeve, a buffer pad, and an actuating air source.

[0009] The split nut assembly includes a damping ring, a support ring, a cylinder, a split nut, a piston, a base, an intake manifold seat, a pressure ring, a nut buffer pad, a pressure ring screw, a first screw buffer pad, a first washer, a chiral four-ligament lattice buffer structure, a concave hexagonal lattice buffer structure, a flywheel, balls, and a base.

[0010] The connecting bolt head has a flange, the upper half of the screw has a connecting thread, and the lower half of the screw has a lead screw thread. The connecting thread achieves the connection function through a mechanism composed of a support ring, a cylinder, a split nut, and a base. The support ring is connected to the cylinder's internal thread through an external thread. The lead screw transmission mechanism, composed of the connecting bolt lead screw thread, a flywheel, balls, and a base forming a bearing mechanism, enables the connecting bolt to drive the flywheel to rotate during the unlocking axial movement. This converts the elastic energy released by the preload during unlocking into the kinetic energy of the flywheel rotation, and achieves a slow release of the preload, reducing the unlocking impact.

[0011] The split nut has a split structure with an internal connecting thread and an external supporting ring rib. The internal thread connects to the connecting bolt, and the outer ring rib is constrained and supported by the supporting ring. The lower end face is a sliding surface and guide that mates with the base body. It also interlocks with the base body for guidance and positioning, preventing the split nut from rotating freely with the base body. The damping ring is located between the intake manifold seat and the supporting ring. When unlocking, the split nut impacts the damping ring to avoid rigid collision with the intake manifold seat.

[0012] The pressure ring connects the separation nut assembly to the upper connecting block through the flange of the base and the pressure ring screw. A nut buffer pad is provided between the pressure ring and the base, and a gap is provided between the pressure ring and the upper connecting block. A first screw buffer pad and a first washer are provided between the pressure ring screw and the pressure ring to prevent rigid collision between the separation nut and the pressure ring, and between the pressure ring screw and the pressure ring during the unlocking process.

[0013] The high-pressure gas from the actuating gas source acts on the cylinder and piston through the gas passage of the intake manifold. Under the action of the high-pressure gas, the cylinder and the support ring compress the concave hexagonal lattice buffer structure and the chiral four-ligament lattice buffer structure. When the radial constraint of the support ring on the split nut is released, the split nut opens radially along the sliding surface of the base under the action of the piston, releasing the axial constraint on the connecting bolt. The connecting bolt passes through the capture bushing under the action of the capture spring, thus capturing the connecting bolt.

[0014] The catcher assembly includes a catcher housing, bolt sleeve, catcher bushing, catcher tail cap, catcher spring, catcher buffer pad, catcher screw, second screw buffer pad, and second washer;

[0015] The capture assembly is connected to the lower connecting block via capture screws. The capture tail cover is connected to the capture housing via internal threads. The capture bushing is fixed between the capture tail cover and the capture housing. The capture bushing is equipped with a number of spring claws to capture the connecting bolts. A second screw buffer and a second washer are provided between the capture screw and the capture housing to prevent rigid collisions between the capture housing and the pressure ring, and between the pressure ring screw and the pressure ring, during the unlocking process. A capture spring is provided between the bolt sleeve and the capture housing. When the separation device is in the connected state, the capture spring is in the compressed state, and the capture spring provides the power for the axial movement of the connecting bolts during unlocking.

[0016] The upper connecting block has a through hole in the center for installing the anti-shear cone sleeve, and the mounting surface has a threaded hole for connecting with the release nut assembly;

[0017] A tapered hole is provided on the bottom surface of the lower connecting block, and the tapered angle of the tapered hole matches the shear tapered sleeve. A threaded hole is provided on the mounting surface to connect with the catcher assembly.

[0018] A buffer pad is placed between the catcher assembly and the mounting surface of the lower connecting block to reduce the impact response transmitted from the connecting bolt striking the catcher buffer pad to the lower connecting block during unlocking.

[0019] In one embodiment of the present invention, the upper connecting block is provided with a ball-and-socket structure, which can be adjusted in the circumferential direction by means of the ball-and-socket structure when installed with the upper connecting structure, so as to adapt to multi-angle installation and connection.

[0020] In one embodiment of the present invention, a recess is provided at the bottom of the lower connecting block, and the number of recesses is set as needed to reduce the unlocking impact transmitted from the connecting surface of the upper connecting block to the lower connecting block.

[0021] In one embodiment of the present invention, the anti-shear cone sleeve is fitted onto the upper connecting block and fits snugly against the connecting block. The cone surface of the anti-shear cone sleeve mates with the cone hole of the lower connecting block. The central hole of the anti-shear cone sleeve is coaxial with the through holes of the upper and lower connecting blocks, thereby realizing the anti-shear function of the very low impact separation device.

[0022] In one embodiment of the present invention, a limiting groove is provided at the contact point between the flywheel and the base and the ball bearing, the flywheel, the ball bearing, and the base form a bearing mechanism, and a lead screw thread is provided at the connection point between the flywheel and the connecting bolt.

[0023] In one embodiment of the present invention, the segmented nut has a three- or four-lobed structure.

[0024] In one embodiment of the present invention, the positioning cone angle of the piston and the split nut can be 10° to 40°, which plays a role in installation and positioning during assembly.

[0025] In one embodiment of the present invention, the base is an axial mounting and positioning surface of the split nut, a sliding surface during the unfolding process, and a guide positioning structure; it is connected to the air intake pipe seat through an internal thread and to the base through an external thread; a limiting ring is provided on the connection surface between the base and the base to play a role in installation and positioning, prevent the flywheel from contacting the base, and completely enclose the interior of the mechanism.

[0026] In one embodiment of the present invention, the intake pipe seat serves as the connection inlet and working channel of the actuating gas source, and also as a guide support and positioning for the movement of the cylinder; the "V"-shaped gas channel provided on the intake pipe seat is connected to the axial gas channel.

[0027] In one embodiment of the present invention, during unlocking, the axial movement of the release nut compresses the nut buffer pad, causing the release nut to lose contact with the mounting surface of the upper connecting block, thus isolating the impact response transmission path between the release nut and the mounting surface of the upper connecting block and reducing the unlocking impact.

[0028] In one embodiment of the present invention, the chiral four-ligament lattice buffer structure and the concave hexagonal lattice buffer structure are 3D printed negative Poisson's ratio buffer structures, which are installed in the groove of the intake manifold seat. When subjected to axial compression, the structure undergoes radial contraction deformation instead of expansion.

[0029] In one embodiment of the present invention, the connecting bolts, support rings, split nuts, and the base are all made of high-strength, high-toughness, and corrosion-resistant materials as the main load-bearing structures of the separation device. The materials of the support rings, split nuts, and the base are 0Cr13Ni8Mo2Al, and the materials of the connecting bolts are GH4169.

[0030] In one embodiment of the present invention, the buffer pad, the damping ring, the nut buffer pad, the first screw buffer pad, the catcher buffer pad, and the second screw buffer pad are made of high-damping rubber material, and the material dynamic loss factor is 0.35 to 1.0.

[0031] In one embodiment of the present invention, the connection working principle is that the connecting bolt passes through the bolt sleeve, the lower connecting block, and the upper connecting block, and the threaded connection capability is achieved through the mechanism composed of the support ring, the cylinder, the split nut, and the base; the connecting bolt applies an installation torque through the external hexagon to connect the upper and lower structural parts.

[0032] Compared with the prior art, the present invention has the following advantages:

[0033] (1) The separation device of the present invention has a closed structure and the separation device and the connecting structure are integrated into one unit. During installation and use, they are connected through the connecting holes on the connecting block. The separation device is maintenance-free and easy to install.

[0034] (2) The separation device of the present invention has strong installation adaptability. The connecting device is connected by a ball socket-ball head structure, which can adapt to multi-angle installation requirements.

[0035] (3) The separation device of the present invention has high connection efficiency. It adopts a split nut and connecting bolt structure and achieves load bearing through the connecting thread, resulting in high connection efficiency.

[0036] (4) The separation device of the present invention has low unlocking impact. It comprehensively adopts reverse pull unlocking, gas channel perpendicular to device axis, screw and bearing mechanism, high damping rubber buffer pad, negative Poisson ratio lattice buffer structure and weak constraint pressure ring structure to achieve the impact reduction effect of the two main impact sources of pre-tightening force release and structural collision, and achieves very low impact response of separation device.

[0037] (5) The separation device of the present invention forms a closed cavity after working, which has good sealing performance, no external pollution, and light weight;

[0038] (6) The separation device of the present invention has low impact response, high load-bearing capacity, convenient installation, and multi-directional adjustment of the connection structure with the upper stage, and strong structural installation adaptability. Attached Figure Description

[0039] Figure 1 This is a structural outline of the separation device of the present invention.

[0040] Figure 2 This is a schematic diagram of the structural connection principle of the separation device of the present invention.

[0041] Figure 3 This is a schematic diagram illustrating the unlocking principle of the separation device structure of the present invention.

[0042] Figure 4 This is a schematic diagram of the separation nut assembly structure of the separation device of the present invention.

[0043] Figure 5 This is a schematic diagram of the capture component structure of the separation device of the present invention.

[0044] Figure 6 This is a schematic diagram of the connection mechanism of the separation device of the present invention.

[0045] Figure 7 This is a schematic diagram of the connecting block structure on the separation device of the present invention.

[0046] Figure 8 This is a schematic diagram of the lower connecting block structure of the separation device of the present invention.

[0047] Figure 9 This is a schematic diagram of the shear-resistant cone sleeve structure of the separation device of the present invention.

[0048] Figure 10 This is a schematic diagram of the air inlet pipe seat structure of the separation device of the present invention.

[0049] Figure 11 This is a schematic diagram of the bushing structure of the separation device of the present invention. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0051] A multi-directional adjustable, very low-impact, maintenance-free point-type separation device includes a separation nut assembly 1, a catcher assembly 2, a connecting bolt 3, an upper connecting block 4, a lower connecting block 5, a shear cone sleeve 6, a buffer pad 7, and an actuating air source 8, such as... Figure 1 , Figure 2 As shown.

[0052] The split nut assembly 1 includes a damping ring 9, a support ring 10, a cylinder 11, a split nut 12, a piston 13, a base 14, an intake manifold seat 15, a pressure ring 16, a nut buffer pad 17, a pressure ring screw 18, a first screw buffer pad 19, a first washer 20, a chiral four-ligament lattice buffer structure 21, a concave hexagonal lattice buffer structure 22, a first sealing ring 23, a second sealing ring 24, a third sealing ring 25, a flywheel 26, a ball bearing 27, and a base 28, as shown. Figure 4 As shown.

[0053] The catcher assembly 2 includes a catcher housing 29, a bolt sleeve 30, a catcher bushing 31, a catcher tail cap 32, a catcher spring 33, a catcher buffer pad 34, a catcher screw 35, a second screw buffer pad 36, and a second washer 37, as shown. Figure 5 As shown.

[0054] The upper connecting block 4 has a through hole at its center for installing the shear cone sleeve 6, and a threaded hole on its mounting surface for connection with the release nut assembly 1. The upper connecting block 4 is equipped with a ball-and-socket structure 39, which allows for circumferential adjustment during installation with the upper-level connecting structure, accommodating multi-angle installation connections. Figure 7 As shown.

[0055] The bottom surface of the lower connecting block 5 is provided with a tapered hole, the tapered angle of which matches the shear-resistant tapered sleeve 6. The mounting surface is provided with a threaded hole for connection to the catcher assembly 2. The bottom of the lower connecting block 5 is provided with a recess 40; the number of recesses can be set as needed to reduce the unlocking impact transmitted from the connecting surface of the upper connecting block 4 to the lower connecting block 5. Figure 8 As shown.

[0056] The shear-resistant cone sleeve 6 is assembled on the upper connecting block 4 and fits snugly against it. Its cone surface mates with the cone hole of the lower connecting block 5. The center hole is coaxial with the through holes of both the upper and lower connecting blocks 4 and 5, thus achieving the shear resistance function of the very low impact separation device. The structure of the shear-resistant cone sleeve 6 is as follows: Figure 9 As shown.

[0057] The buffer pad 7 is positioned between the mounting surfaces of the catcher assembly 2 and the lower connecting block 5 to reduce the impact response transmitted from the connecting bolt 3 to the catcher buffer pad 34 and then to the lower connecting block 5 when the catcher is unlocked.

[0058] The flywheel 26 and base 28 are provided with a limiting groove at the contact point with the ball 27. The flywheel 26, the ball 27, and the base 28 form a bearing mechanism. The flywheel 26 is provided with a lead screw thread at the connection point with the connecting bolt 3.

[0059] The connecting bolt 3 has a flange on its head. The upper half of the bolt has a connecting thread, and the lower half has a lead screw thread. The connecting thread achieves the connection function through a mechanism composed of a support ring 10, a cylinder 11, a split nut 12, and a base 14. The support ring 10 is connected to the cylinder 11 through an external thread. The lead screw transmission mechanism, composed of the lead screw thread of the connecting bolt 3, a flywheel 26, a ball 27, and a base 28 forming a bearing mechanism, enables the connecting bolt 3 to drive the flywheel 26 to rotate during the axial movement of the unlocking process. This converts the elastic energy released by the preload during unlocking into the kinetic energy of the flywheel 26, and achieves a slow release of the preload, reducing the unlocking impact.

[0060] The split nut 12 has a split structure with internal connecting threads and external supporting ring ribs. It can be divided into three-lobed or four-lobed structures. The internal thread connects with the connecting bolt 3, and the outer ring rib is constrained and supported by the supporting ring 10. The lower end face is a sliding surface and guide that mates with the base 14. The sliding slope can be 10° to 40°. At the same time, it can be interlocked with the base 14 for guidance and positioning, preventing the split nut 12 from rotating freely with the base 14.

[0061] The positioning cone angle of the piston 13 and the split nut 12 can be 10° to 40°, which plays a role in installation and positioning during assembly.

[0062] The base 14 serves as the axial mounting and positioning surface for the split nut 12, as well as the sliding surface and guiding and positioning structure during the unfolding process. It is connected to the intake manifold seat 15 via an internal thread and to the base 28 via an external thread. A limiting ring is provided on the connection surface between the base 14 and the base 28, serving a positioning function to prevent the flywheel 26 from contacting the base 14 and to completely enclose the mechanism internally.

[0063] The intake manifold 15 serves as the connection inlet and working channel for the actuating air source 8, and also as a guide, support, and positioning element for the movement of the cylinder 11. Figure 10 As shown. The interface of the actuating air source is perpendicular to the product axis, and the interfaces of the two actuating air sources are parallel, thereby reducing axial installation space and unlocking impact. The "V"-shaped gas channel 38 set on the air inlet pipe seat 15 is connected to the axial gas channel 42, and the included angle between the axes of the two gas channels of the "V"-shaped gas channel 38 can be 52° to 72°.

[0064] The retaining ring 16 connects the release nut assembly 1 to the upper connecting block 4 via the flange of the base 14 and the retaining ring screw 18. A nut buffer pad 17 is provided between the retaining ring 16 and the base 14. A gap exists between the retaining ring 16 and the upper connecting block 4, preventing direct contact; the retaining ring 16 provides a weak constraint on the release nut. The retaining ring screw 18 is a stepped screw design. The step of the retaining ring screw 18 contacts the upper connecting block 4 to apply torque, thus fixing the release nut. During unlocking, the axial movement of the release nut compresses the nut buffer pad 17, causing the release nut to lose contact with the mounting surface of the upper connecting block 4, isolating the impact response transmission path between the release nut and the mounting surface of the upper connecting block 4, and reducing the unlocking impact. A first screw buffer pad 19 and a first washer 20 are provided between the retaining ring screw 18 and the retaining ring 16 to prevent rigid collisions between the release nut and the retaining ring 16, and between the retaining ring screw 18 and the retaining ring 16 during unlocking, further reducing the unlocking impact.

[0065] The damping ring 9 is located between the intake manifold seat and the support ring 10, and the damping ring 9 is made of polytetrafluoroethylene. When unlocking, the split nut 12 impacts the damping ring 9 to avoid rigid collision with the intake manifold seat 15 and reduce the unlocking impact.

[0066] The chiral four-ligament lattice buffer structure 21 and the concave hexagonal lattice buffer structure 22 are 3D-printed negative Poisson's ratio buffer structures installed in the groove of the intake manifold seat 15. Under axial compression, the structure undergoes radial contraction deformation instead of expansion, preventing rigid collision between the cylinder 11 and the intake manifold seat 15 during unlocking. The concave hexagonal lattice buffer structure 22 has a platform compressive stress of 3MPa to 5MPa, ensuring that the buffer structure can easily deform within the unlocking stroke, guaranteeing smooth unlocking of the release nut and providing sufficient unlocking margin. The chiral four-ligament lattice buffer structure 21 has a platform compressive stress of 15MPa to 17MPa, increasing energy absorption and providing better impact reduction performance.

[0067] The catcher assembly 2 is connected to the lower connecting block 5 by the catcher screw 35, the catcher tail cover 32 is connected to the catcher housing 29 by the internal thread, and the catcher bushing 31 is fixed between the catcher tail cover 32 and the catcher housing 29.

[0068] The capturing bushing 31 is equipped with a number of spring claws 41, more than two in number, to capture the connecting bolt 3 and prevent it from protruding from the separation surface. Figure 11 As shown.

[0069] A second screw buffer pad 36 and a second washer 37 are provided between the catcher screw 35 and the catcher housing 29 to prevent rigid collisions between the catcher housing 29 and the pressure ring 16, and between the pressure ring screw 18 and the pressure ring 16 during the unlocking process, thereby reducing the unlocking impact.

[0070] A catcher spring 33 is provided between the bolt sleeve 30 and the catcher housing 29. When the separation device is in the connected state, the catcher spring 33 is in the compressed state, and the catcher spring 33 provides the power for the axial movement of the connecting bolt 3 when unlocking.

[0071] The supporting ring 10, cylinder 11, split nut 12, and base 14 form a connecting mechanism, such as... Figure 6 As shown. The connecting bolt 3, support ring 10, split nut 12, and base 14, as the main load-bearing structures of the separation device, are all made of high-strength, high-toughness, and corrosion-resistant materials. The support ring 10, split nut 12, and base 14 are made of 0Cr13Ni8Mo2Al, and the connecting bolt 3 is made of GH4169. The cylinder 11 is a non-main load-bearing structure; to reduce the weight of the separation device, the cylinder 11 is made of 2A14.

[0072] The buffer pad 7, vibration damping ring 9, nut buffer pad 17, first screw buffer pad 19, catcher buffer pad 34, and second screw buffer pad 36 are made of high-damping rubber material with a dynamic loss factor of 0.35 to 1.0. Compared with ordinary rubber pads, they have a higher damping ratio and can achieve excellent impact reduction effect. The catcher buffer pad 34 is located at the bottom of the inner cavity of the catcher tail cover 32.

[0073] The first sealing ring 23, the second sealing ring 24, and the third sealing ring 25 are the sealing elements of the actuating air source 8 and the air intake pipe seat 15, the cylinder 11 and the air intake pipe seat 15, and the piston 13 and the cylinder 11, respectively. The first sealing ring 23 is a static seal, and the second sealing ring 24 and the third sealing ring 25 are dynamic seals.

[0074] The actuating gas source 8 is an element or device that generates high-pressure gas, usually an igniter for pyrotechnics, or a gas source pipeline for a high-pressure gas cylinder. The actuating gas source is sealed by the first sealing ring 23.

[0075] Its connection working principle is as follows: the connecting bolt 3 passes through the bolt sleeve 30, the lower connecting block 5, and the upper connecting block 4, and achieves threaded connection through the mechanism composed of the support ring 10, the cylinder 11, the split nut 12, and the base 14. The connecting bolt 3 applies an installation torque through its external hexagonal socket to connect the upper and lower structural parts. The connection state of the separation device is as follows. Figure 2 As shown.

[0076] The unlocking mechanism works as follows: the high-pressure combustion gas from the actuating gas source 8 acts on the cylinder 11 and piston 13 through the gas channel of the intake manifold 15. Under the action of the high-pressure combustion gas, the cylinder 11 and support ring 10 compress the concave hexagonal lattice buffer structure 22 and the chiral four-ligament lattice buffer structure 21. When the radial constraint of the support ring 10 on the split nut 12 is released, the split nut 12, under the action of the piston 13, opens radially along the sliding surface of the base 14, releasing the axial constraint on the connecting bolt 3. The connecting bolt 3 passes through the capturing bushing 31 under the action of the capture spring 33, thus capturing the connecting bolt 3. After operation, the very low impact separation device separates into two parts: the separation nut assembly 1 and the upper connecting block 4 separate as a whole, and the capture assembly 2 and the lower connecting block 5 separate as a whole. The unlocked state of the separation device is as follows: Figure 3 As shown.

[0077] The contents not described in detail in this specification are common knowledge to those skilled in the art.

[0078] 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 to the technical solutions of the present invention by utilizing the methods and techniques disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention shall fall within the protection scope of the technical solutions of the present invention.

Claims

1. A multi-directional adjustable, very low-impact, maintenance-free point-type separation device, characterized in that, Includes a separating nut assembly (1), a catcher assembly (2), a connecting bolt (3), an upper connecting block (4), a lower connecting block (5), an anti-shear cone sleeve (6), a buffer pad (7), and an actuating air source (8); The split nut assembly (1) includes a damping ring (9), a support ring (10), a cylinder (11), a split nut (12), a piston (13), a base (14), an intake manifold seat (15), a pressure ring (16), a nut buffer pad (17), a pressure ring screw (18), a first screw buffer pad (19), a first washer (20), a chiral four-ligament lattice buffer structure (21), a concave hexagonal lattice buffer structure (22), a flywheel (26), a ball bearing (27), and a base (28). The head of the connecting bolt (3) has a flange. The upper part of the screw is a connecting thread, and the lower part of the screw is a screw thread. The connecting thread achieves the connection function through the mechanism composed of the support ring (10), the cylinder (11), the split nut (12), and the base (14). The support ring (10) is connected to the internal thread of the cylinder (11) through the external thread. The screw thread of the connecting bolt (3) and the bearing mechanism formed by the flywheel (26), the ball (27), and the base (28) realize the screw transmission mechanism. During the axial movement of the connecting bolt (3) during unlocking, the flywheel (26) is driven to rotate, so as to convert the elastic energy released by the preload during unlocking into the kinetic energy of the flywheel (26) rotation, and realize the slow release of the preload, reducing the unlocking impact. The split nut (12) has a split structure with an internal connecting thread and an external supporting ring rib. The internal thread is connected to the connecting bolt (3), and the external ring rib is constrained and supported by the supporting ring (10). The lower end face is a sliding surface and guide that mates with the base (14). It also fits into the base (14) for guidance and positioning, preventing the split nut (12) and the base (14) from rotating freely. The damping ring (9) is located between the intake pipe seat and the supporting ring (10). When unlocking, the split nut (12) hits the damping ring (9) to avoid rigid collision with the intake pipe seat (15). The pressure ring (16) is connected to the separation nut assembly (1) and the upper connecting block (4) by means of the flange of the base (14) and the pressure ring screw (18); a nut buffer pad (17) is provided between the pressure ring (16) and the base (14), and a gap is provided between the pressure ring (16) and the upper connecting block (4); a first screw buffer pad (19) and a first washer (20) are provided between the pressure ring screw (18) and the pressure ring (16) to prevent the separation nut from rigidly colliding with the pressure ring (16) and the pressure ring screw (18) with the pressure ring (16) during the unlocking process; The high-pressure gas from the actuating gas source (8) acts on the cylinder (11) and piston (13) through the gas passage of the inlet pipe seat (15). Under the action of the high-pressure gas, the cylinder (11) and the support ring (10) compress the concave hexagonal lattice buffer structure (22) and the chiral four-ligament lattice buffer structure (21). When the radial constraint of the support ring (10) on the split nut (12) is released, the split nut (12) opens radially along the sliding surface of the base (14) under the action of the piston (13), releasing the axial constraint on the connecting bolt (3). Under the action of the catcher spring (33), the connecting bolt (3) passes through the catcher bushing (31) to achieve the capture of the connecting bolt (3). The catcher assembly (2) includes a catcher housing (29), a bolt sleeve (30), a catcher bushing (31), a catcher tail cap (32), a catcher spring (33), a catcher buffer pad (34), a catcher screw (35), a second screw buffer pad (36), and a second washer (37); The capture assembly (2) is connected to the lower connecting block (5) by the capture screw (35). The capture tail cover (32) is connected to the capture housing (29) by the internal thread. The capture bushing (31) is fixed between the capture tail cover (32) and the capture housing (29). The capture bushing (31) is provided with a number of spring claws (41) to realize the capture function of the connecting bolt (3). A second screw buffer pad (36) and a second washer (37) are provided between the capture screw (35) and the capture housing (29) to prevent the capture housing (29) from rigidly colliding with the pressure ring (16) and the pressure ring screw (18) and the pressure ring (16) during the unlocking process. A capture spring (33) is provided between the bolt sleeve (30) and the capture housing (29). When the separation device is in the connected state, the capture spring (33) is in the compressed state. The capture spring (33) provides the power for the axial movement of the connecting bolt (3) during unlocking. The upper connecting block (4) has a through hole in the center for installing the anti-shear cone sleeve (6), and the mounting surface has a threaded hole for connecting with the release nut assembly (1); A tapered hole is provided on the bottom surface of the lower connecting block (5), the tapered angle of the tapered hole matches the shear tapered sleeve (6), and a threaded hole is provided on the mounting surface to connect with the catcher assembly (2); A buffer pad (7) is provided between the mounting surfaces of the catcher assembly (2) and the lower connecting block (5) to reduce the impact response transmitted from the connecting bolt (3) hitting the catcher buffer pad (34) to the lower connecting block (5) when unlocking.

2. The multi-directional adjustable, very low-impact, maintenance-free point separation device according to claim 1, characterized in that, The upper connecting block (4) is provided with a ball-and-socket structure (39), which can be adjusted in the circumferential direction through the ball-and-socket structure when installed with the upper connecting structure, so as to adapt to multi-angle installation and connection.

3. The multi-directional adjustable, very low-impact, maintenance-free point separation device according to claim 1, characterized in that, The bottom of the lower connecting block (5) is provided with a recess (40), the number of which is set as needed to reduce the unlocking impact transmitted from the connecting surface of the upper connecting block (4) to the lower connecting block (5).

4. The multi-directional adjustable very low impact maintenance-free point separation device according to claim 1, characterized in that, The shear-resistant cone sleeve (6) is assembled on the upper connecting block (4) and fits against the upper connecting block (4). The cone surface of the shear-resistant cone sleeve (6) matches the cone hole of the lower connecting block (5). The center hole of the shear-resistant cone sleeve (6) is coaxial with the through holes of the upper connecting block (4) and the lower connecting block (5), thereby realizing the shear-resistant function of the very low impact separation device.

5. The multi-directional adjustable, very low-impact, maintenance-free point separation device according to claim 1, characterized in that, The flywheel (26) and the base (28) are provided with a limiting groove at the contact point with the ball (27). The flywheel (26), the ball (27), and the base (28) form a bearing mechanism. The flywheel (26) is provided with a lead screw thread at the connection point with the connecting bolt (3).

6. The multi-directional adjustable, very low-impact, maintenance-free point-type separation device according to claim 1, characterized in that, The split nut (12) has a three- or four-lobed structure.

7. The multi-directional adjustable, very low-impact, maintenance-free point separation device according to claim 1, characterized in that, The positioning cone angle of the piston (13) and the split nut (12) can be 10° to 40°, which plays a role in installation and positioning during assembly.

8. The multi-directional adjustable, very low-impact, maintenance-free point separation device according to claim 1, characterized in that, The base (14) serves as the axial mounting and positioning surface of the split nut (12), the sliding surface during the unfolding process, and the guide positioning structure. It is connected to the intake pipe seat (15) via an internal thread and to the base (28) via an external thread. The connection surface between the base (14) and the base (28) is provided with a limiting ring, which serves as the mounting and positioning function, preventing the flywheel (26) from contacting the base (14) and completely enclosing the interior of the mechanism.

9. The multi-directional adjustable, very low-impact, maintenance-free point-type separation device according to claim 1, characterized in that, The intake pipe seat (15) serves as the connection inlet and working channel for the actuating air source (8), and also as a guide support and positioning for the movement of the cylinder (11); the "V"-shaped gas channel (38) set on the intake pipe seat (15) is connected to the axial gas channel (42).

10. The multi-directional adjustable, very low-impact, maintenance-free point separation device according to claim 1, characterized in that, When unlocking, the axial movement of the release nut compresses the nut buffer pad (17), and the release nut loses contact with the mounting surface of the upper connecting block (4), thus isolating the impact response transmission path between the release nut and the mounting surface of the upper connecting block (4) and reducing the unlocking impact.

11. The multi-directional adjustable, very low-impact, maintenance-free point separation device according to claim 1, characterized in that, The chiral four-ligament lattice buffer structure (21) and the concave hexagonal lattice buffer structure (22) are 3D printed negative Poisson's ratio buffer structures, which are installed in the groove of the intake pipe seat (15). When subjected to axial compression, the structure undergoes radial contraction deformation instead of expansion.

12. The multi-directional adjustable, very low-impact, maintenance-free point separation device according to claim 1, characterized in that, The connecting bolt (3), support ring (10), split nut (12) and base (14) are all made of high-strength, high-toughness and corrosion-resistant materials as the main load-bearing structures of the separation device. The materials of the support ring (10), split nut (12) and base (14) are 0Cr13Ni8Mo2Al, and the material of the connecting bolt (3) is GH4169.

13. The multi-directional adjustable, very low-impact, maintenance-free point separation device according to claim 1, characterized in that, The buffer pad (7), damping ring (9), nut buffer pad (17), first screw buffer pad (19), catcher buffer pad (34), and second screw buffer pad (36) are made of high-damping rubber material with a material dynamic loss factor of 0.35 to 1.

0.

14. The multi-directional adjustable, very low-impact, maintenance-free point separation device according to claim 1, characterized in that, The connection working principle is that the connecting bolt (3) passes through the bolt sleeve (30), the lower connecting block (5), and the upper connecting block (4), and achieves threaded connection capability through the mechanism composed of the support ring (10), the cylinder (11), the split nut (12), and the base (14); the connecting bolt (3) applies the installation torque through the external hexagon to connect the upper and lower parts of the structure.

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