Multi-directional-adjustment very-low-impact maintenance-free point type separation device

Abstract

According to the multi-direction-adjustable very-low-impact maintenance-free point type separation device, a connecting bolt penetrates through a bolt sleeve, a lower connecting block and an upper connecting block, and the threaded connection capacity is achieved through a mechanism composed of a supporting ring, a cylinder, a sectioning nut and a base body. The connecting bolt applies installation torque through the outer hexagon to connect the upper part structure and the lower part structure. According to the unlocking working principle, working high-pressure gas of an actuating gas source acts on a cylinder and a piston through a gas channel of a gas inlet pipe base, and the cylinder and a supporting ring compress an inwards-concave hexagonal dot matrix buffering structure and a chiral four-ligament dot matrix buffering structure under the action of the high-pressure gas; under the action of the piston, the split nut is opened in the radial direction of the sliding face of the base body, and axial constraint on the connecting bolt is relieved. The connecting bolt penetrates through the capturing lining under the action of the capturer spring, and capturing of the connecting bolt is achieved.

Description

Technical Field

[0001] The invention relates to a multi-directionally adjustable very low impact maintenance-free point-type separation device, belonging to the technical field of spacecraft structures. Background Art

[0002] As a key component of the aircraft, the performance of the separation device directly affects whether the flight mission can be successfully completed. As the most commonly used pyrotechnic point separation device, the separation nut device has the advantages of high reliability, compact size, and small impact response compared to traditional pyrotechnic point separation devices such as explosive bolts. It has been widely used in the separation of spacecraft and rockets.

[0003] However, since the separation nut device has a more complex structure than traditional pyrotechnic point separation devices such as explosive bolts, there are many faults during the installation, use and maintenance process caused by improper operation, resulting in poor product performance or even failure to work, thus leading to the failure of the launch mission.

[0004] At the same time, 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 carriers and satellites have increased. These high-precision instruments and equipment have increasingly stringent requirements for low-impact environments, requiring that the impact response within the 4000Hz frequency domain be no greater than 1000g. However, the impact response of traditional pyrotechnic point separation devices in service is generally not less than 5000g within the 4000Hz frequency domain, which cannot meet the low-impact requirements of precision instruments and equipment.

[0005] In order to solve the problem of large impact response of the existing traditional pyrotechnic point separation device, the commonly used methods include adding buffer energy absorption devices on the impact path, reducing the amount of explosives, etc. However, it is difficult to meet the requirement of impact response not exceeding 1000g in the 4000Hz frequency domain by simply taking a certain impact reduction method. 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-directionally adjustable very low impact maintenance-free point separation device, so that the separation device is maintenance-free during installation, use and maintenance, and by taking a series of impact reduction measures, a very low impact effect of a near-field impact response peak value not exceeding 600g is achieved in the 4000Hz frequency domain.

[0007] The purpose of the present invention is achieved through the following technical solutions:

[0008] A multi-directional adjustable very low impact maintenance-free point separation device, comprising 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 separation nut assembly includes a vibration damping ring, a support ring, a cylinder, a split nut, a piston, a base, an intake pipe 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, a ball, and a base;

[0010] The connecting bolt head has a flange, the upper part of the screw is a connecting thread, and the lower part of the screw is a lead screw thread. The connecting thread realizes the connection function through a mechanism composed of a support ring, a cylinder, a petal nut, and a base. The support ring is connected to the inner thread of the cylinder through an external thread; the lead screw transmission mechanism composed of the lead screw thread of the connecting bolt and the bearing mechanism formed by the flywheel, the ball, and the base realizes the axial movement of the docking bolt to drive the flywheel to rotate, so as to convert the elastic energy released by the preload force during unlocking into the kinetic energy of the flywheel rotation, and realize the slow release of the preload force, thereby reducing the unlocking impact;

[0011] The split nut is a split structure with connecting threads inside and supporting ring ribs outside. The internal threads are connected to the connecting bolts, and the outer ring ribs are constrained and supported by the supporting ring. The lower end surface is a sliding surface and guide that matches the base, and is mutually embedded with the base for guiding and positioning to prevent the split nut and the base from rotating freely. The vibration-damping ring is located between the intake pipe seat and the supporting ring. When unlocking, the split nut hits the vibration-damping ring to avoid rigid collision with the intake pipe seat.

[0012] The pressure ring is connected to the structure of the separation nut assembly and the upper connecting block by the pressure ring screw through the flange of the base; a nut buffer pad is provided between the pressure ring and the base, a gap is provided between the pressure ring and the upper connecting block, and a first screw buffer pad and a first washer are provided between the pressure ring screw and the pressure ring, so as to avoid the 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 working high-pressure combustion gas of the actuating gas source acts on the cylinder and the piston through the gas channel of the intake pipe seat. The cylinder and the support ring compress the concave hexagonal lattice buffer structure and the chiral four-ligament lattice buffer structure under the action of the high-pressure combustion gas. When the radial constraint of the split nut by the support ring is released, the split nut opens radially along the sliding surface of the base under the action of the piston, and the axial constraint on the connecting bolt is released; the connecting bolt passes through the capture bushing under the action of the capture spring to realize the capture of the connecting bolt;

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

[0015] The capture assembly is connected to the lower connecting block through a capture screw, the capture tail cover is connected to the external thread of the capture shell through an internal thread, and the capture bushing is fixed between the capture tail cover and the capture shell; the capture bushing is provided with a number of spring claws to realize the capture function of the connecting bolt; a second screw buffer pad and a second gasket are provided between the capture screw and the capture shell to prevent the capture shell from colliding with the pressure ring, and the pressure ring screw from colliding with the pressure ring during the unlocking process; a capture spring is provided between the bolt sleeve and the capture shell, and the capture spring is in a compressed state when the separation device is in a connected state, and the capture spring provides power for the axial movement of the connecting bolt when unlocking;

[0016] A through hole is provided in the center of the upper connection block for installing the shear cone sleeve, and a threaded hole is provided on the mounting surface for connecting with the separation nut assembly;

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

[0018] The buffer pad is arranged between the catcher assembly and the mounting surface of the lower connecting block, so as to reduce the impact response transmitted to the lower connecting block by the connecting bolt hitting the catcher buffer pad when unlocking.

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

[0020] In one embodiment of the present invention, a depression is provided at the bottom of the lower connecting block, and the number of the depressions is set as required 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 shear-resistant cone sleeve is assembled on the upper connecting block and fits with the connecting block. The conical surface of the shear-resistant cone sleeve cooperates with the conical hole of the lower connecting block. The center hole of the shear-resistant cone sleeve is coaxial with the through holes of the upper connecting block and the lower connecting block, thereby realizing the shear-resistant 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, the flywheel, the ball 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 split-petal nut is a three-petal or four-petal structure.

[0024] In one embodiment of the present invention, the angle of the positioning cone surface 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 the axial installation positioning surface of the split nut and the sliding surface and guide positioning structure during the expansion process; at the same time, it is connected to the intake pipe seat through an internal thread and connected to the base through an external thread; a limit ring is provided on the connecting surface between the base and the base, which plays a role in installation positioning, avoids contact between the flywheel and the base, and completely seals the inside of the mechanism.

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

[0027] In one embodiment of the present invention, when unlocking, the separation nut moves axially to compress the nut buffer pad, causing the separation nut to lose contact with the upper connecting block mounting surface, isolating the impact response transmission path between the separation nut and the upper connecting block mounting surface, thereby 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 pipe seat. When subjected to axial compression, the structure undergoes radial contraction and deformation rather than expansion.

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

[0030] In one embodiment of the present invention, the buffer pad, the vibration reduction 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 power loss factor is 0.35-1.0.

[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 realized through a mechanism composed of a support ring, a cylinder, a split nut, and a base; the connecting bolt applies an installation torque through an external hexagon to connect the upper and lower structures.

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

[0033] (1) The structure of the separation device of the present invention is closed, the separation device is integrated with the connection structure, and the connection is performed through the connection hole on the connection block during installation and use. The separation device is maintenance-free and easy to install;

[0034] (2) The separation device of the present invention has strong installation adaptability, and the connection device is connected through 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, adopts a split nut and a connecting bolt structure, realizes load bearing through connecting threads, and has high connection efficiency;

[0036] (4) The release device of the present invention has a small unlocking impact. It adopts a reverse-pull unlocking, a gas channel perpendicular to the axis of the device, a screw and bearing mechanism, a high-damping rubber cushion, a negative Poisson's ratio lattice buffer structure, and a weakly constrained pressure ring structure to achieve an impact reduction effect on the two main impact sources of preload release and structural collision, thereby achieving a very low impact response of the release device;

[0037] (5) After the separation device of the present invention is in operation, a closed cavity is formed, the sealing performance is good, no pollution is caused to the outside, and the structure is light in weight;

[0038] (6) The separation device of the present invention has low impact response, high bearing capacity, convenient installation, can be adjusted in multiple directions with the upper connection structure, and has strong structural installation adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a structural outline diagram 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 The schematic diagram of the structure unlocking of the separation device of the present invention is shown in FIG.

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

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

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

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

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

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

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

[0049] Fig.11 It is a schematic diagram of the structure of the bushing of the separation device of the present invention. DETAILED DESCRIPTION

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

[0051] A multi-directional adjustable very low impact maintenance-free point separation device comprises 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. Figure 1 , Figure 2 shown.

[0052] The separation 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 pipe seat 15, a pressure ring 16, a nut buffer 17, a pressure ring screw 18, a first screw buffer 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 27, and a base 28. Figure 4 shown.

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

[0054] The upper connection block 4 is provided with a through hole in the center for installing the shear cone sleeve 6, and the mounting surface is provided with a threaded hole for connecting with the separation nut assembly 1. The upper connection block 4 is provided with a ball socket structure 39, which can be adjusted in the circumferential direction through the ball socket-ball head structure when installed with the upper connection structure, so as to adapt to multi-angle installation and connection, such as Figure 7 shown.

[0055] A conical hole is provided on the bottom surface of the lower connecting block 5, and the conical angle of the conical hole matches the shear-resistant cone sleeve 6. A threaded hole is provided on the mounting surface to connect with the catcher assembly 2. A recess 40 is provided on the bottom of the lower connecting block 5, and the number of recesses can be set as required to reduce the unlocking impact transmitted from the connecting surface of the upper connecting block 4 to the lower connecting block 5. Figure 8 shown.

[0056] The shear-resistant cone sleeve 6 is assembled on the upper connecting block 4 and fits with the connecting block 4. The cone surface matches with the cone hole of the lower connecting block 5. The center hole is coaxial with the through holes of the upper connecting block 4 and the lower connecting block 5, so as to realize the shear-resistant function of the very low impact separation device. Fig. 9 shown.

[0057] The buffer pad 7 is arranged between the capturer assembly 2 and the mounting surface of the lower connecting block 5 to reduce the impact response transmitted to the lower connecting block 5 by the connecting bolt 3 hitting the capturer buffer pad 34 when unlocking.

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

[0059] The head of the connecting bolt 3 is provided with a flange, the upper part of the screw is a connecting thread, and the lower part of the screw is a lead screw thread. The connecting thread realizes the connection function through a mechanism composed of a support ring 10, a cylinder 11, a petal nut 12, and a base 14. The support ring 10 is connected to the inner thread of the cylinder 11 through an external thread. The lead screw transmission mechanism composed of the lead screw thread of the connecting bolt 3 and the bearing mechanism formed by the flywheel 26, the ball 27, and the base 28 realizes the axial movement of the docking bolt 3 to drive the flywheel 26 to rotate, realizes the conversion of the elastic energy released by the preload force during unlocking into the kinetic energy of the rotation of the flywheel 26, and realizes the slow release of the preload force, thereby reducing the impact of unlocking.

[0060] The split nut 12 is a split structure with connecting threads inside and supporting ring ribs outside, which can be divided into three-petal or four-petal structures. The internal threads are connected to the connecting bolts 3, and the outer ring ribs are constrained and supported by the supporting ring 10. The lower end surface is a sliding surface and guide that cooperates with the base 14. The sliding inclined plane can be 10° to 40°, and can be mutually embedded with the base 14 for guidance and positioning to prevent the split nut 12 and the base 14 from rotating freely.

[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 is the axial installation and positioning surface of the split nut 12, the sliding surface and the guide positioning structure during the expansion process. At the same time, it is connected to the intake pipe seat 15 through the internal thread and connected to the base 28 through the external thread. A limit ring is provided on the connection surface between the base 14 and the base 28 to play the role of installation and positioning, prevent the flywheel 26 from contacting the base 14, and completely seal the inside of the mechanism.

[0063] The air inlet pipe seat 15 is the connection inlet and working channel of the actuating air source 8, and also serves as a guide support and positioning for the movement of the cylinder 11. Fig.10 As shown. The interface of the actuating gas source is perpendicular to the product axis, and the interfaces of the two actuating gas sources are parallel, so as to reduce the axial installation space and the unlocking impact. The "V"-shaped gas channel 38 provided on the inlet pipe seat 15 is connected with the axial gas channel 39, and the angle between the two gas channel axes of the "V"-shaped gas channel 38 can be 52° to 72°.

[0064] The pressure ring 16 is connected to the structure of the separation nut assembly 1 and the upper connecting block 4 by means of the pressure ring screw 18 through the flange of the base 14. A nut buffer pad 17 is provided between the pressure ring 16 and the base 14. A gap is provided between the pressure ring 16 and the upper connecting block 4, and there is no direct contact between the pressure ring 16 and the upper connecting block 4. The pressure ring 16 is a weak constraint on the separation nut. The pressure ring screw 18 is designed as a step screw. The step of the pressure ring screw 18 contacts the upper connecting block 4 to apply torque to fix the separation nut. When unlocking, the separation nut axially moves to compress the nut buffer pad 17, and the separation nut loses contact with the mounting surface of the upper connecting block 4, isolating the impact response transmission path between the separation nut and the mounting surface of the upper connecting block 4, thereby reducing the unlocking impact. A first screw buffer pad 19 and a first washer 20 are provided between the pressure ring screw 18 and the pressure ring 16, which play a role in preventing the separation nut from rigidly colliding with the pressure ring 16 and the pressure ring screw 18 from rigidly colliding with the pressure ring 16 during the unlocking process, thereby reducing the unlocking impact.

[0065] The vibration-damping ring 9 is located between the air intake pipe seat and the support ring 10, and the vibration-damping ring 9 is made of polytetrafluoroethylene. When unlocking, the petal nut 12 hits the vibration-damping ring 9 to avoid rigid collision with the air intake pipe seat 15, thereby reducing the impact of unlocking.

[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, which are installed in the groove of the intake pipe seat 15. When subjected to axial compression, the structure undergoes radial contraction deformation rather than expansion, avoiding rigid collision between the cylinder 11 and the intake pipe seat 15 when unlocking. The platform compression stress of the concave hexagonal lattice buffer structure 22 is 3MPa~5MPa, ensuring that the buffer structure is easy to deform within the unlocking stroke, ensuring that the separation nut is unlocked smoothly, and having sufficient unlocking margin. The platform compression stress of the chiral four-ligament lattice buffer structure 21 is 15MPa~17MPa, the energy absorption effect is increased, and it has good impact reduction performance.

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

[0068] The capture bushing 31 is provided with a plurality of spring claws 41, the number of which is greater than 2, to achieve the capture function of the connecting bolt 3 and prevent the connecting bolt 3 from protruding from the separation surface. Fig.11 shown.

[0069] 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 from rigidly colliding with 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 a compressed state, and the catcher spring 33 provides power for the axial movement of the connecting bolt 3 when unlocking.

[0071] The support ring 10, the cylinder 11, the split nut 12, and the base 14 form a connecting mechanism. Figure 6 As shown. The connecting bolts 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 materials of the support ring 10, split nut 12 and base 14 are 0Cr13Ni8Mo2Al, and the connecting bolts 3 are made of GH4169. The cylinder 11 is a non-main load-bearing structure. In order to reduce the weight of the separation device, the cylinder 11 is made of 2A14.

[0072] The buffer pad 7, the vibration reduction ring 9, the nut buffer pad 17, the first screw buffer pad 19, the catcher buffer pad 34, and the second screw buffer pad 36 are made of high damping rubber material, and the material power loss factor is 0.35-1.0. 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 sealing elements for the actuating air source 8 and the air inlet pipe seat 15, the cylinder 11 and the air inlet 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 a component or device for generating high-pressure gas, usually an igniter of an explosive device, or a gas source pipeline of a high-pressure gas cylinder. The actuating gas source is sealed by a first sealing ring 23 .

[0075] The connection working principle is that the connection bolt 3 passes through the bolt sleeve 30, the lower connection block 5, and the upper connection block 4, and the threaded connection capability is realized through the mechanism composed of the support ring 10, the cylinder 11, the split nut 12, and the base 14. The connection bolt 3 applies the installation torque through the external hexagon to connect the upper and lower parts of the structure. Figure 2 shown.

[0076] The unlocking working principle is that the working high-pressure fuel gas of the actuating gas source 8 acts on the cylinder 11 and the piston 13 through the gas channel of the intake pipe seat 15. 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 under the action of the high-pressure fuel gas. When the radial constraint of the split nut 12 by the support ring 10 is released, the split nut 12 opens radially along the sliding surface of the base 14 under the action of the piston 13, thereby releasing the axial constraint on the connecting bolt 3. The connecting bolt 3 passes through the capture bushing 31 under the action of the capture spring 33 to capture the connecting bolt 3. After working, the very low impact separation device is separated into two parts, the separation nut assembly 1 is separated from the upper connecting block 4 as a whole, and the capture assembly 2 is separated from the lower connecting block 5 as a whole. The unlocking state of the separation device is as follows: Figure 3 shown.

[0077] The contents not described in detail in the specification of the present invention belong to the common knowledge of those skilled in the art.

[0078] Although the present invention has been disclosed as above in the form of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A multi-directional adjustable very low impact maintenance-free point separation device, characterized in that: It comprises 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-resistant cone sleeve (6), a buffer pad (7), and an actuating air source (8); The separation nut assembly (1) comprises a vibration damping ring (9), a support ring (10), a cylinder (11), a split nut (12), a piston (13), a base (14), an intake pipe 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 (27), and a base (28); The head of the connecting bolt (3) is provided with a flange, the upper part of the screw is a connecting thread, and the lower part of the screw is a lead screw thread. The connecting thread realizes a connection function through a mechanism composed of a support ring (10), a cylinder (11), a petal nut (12), and a base (14). The support ring (10) is connected to the inner thread of the cylinder (11) through an outer thread. The lead screw transmission mechanism composed of the lead screw thread of the connecting bolt (3) and a bearing mechanism formed by a flywheel (26), a ball (27), and a base (28) realizes that the flywheel (26) is driven to rotate during the axial movement of the docking bolt (3) during unlocking, thereby converting the elastic energy released by the preload force during unlocking into the kinetic energy of the flywheel (26) rotation, and realizing the slow release of the preload force, thereby reducing the unlocking impact. The split nut (12) is a split structure with a connecting thread inside and a supporting ring rib outside, 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 surface is a sliding surface and a guide that cooperates with the base (14), and is simultaneously mutually engaged with the base (14) for guiding and positioning, thereby preventing the split nut (12) and the base (14) from rotating freely; the vibration-damping ring (9) is located between the intake pipe seat and the supporting ring (10), and when unlocked, the split nut (12) hits the vibration-damping ring (9) to avoid rigid collision with the intake pipe seat (15); The pressure ring (16) is connected to the structure of the separation nut assembly (1) and the upper connecting block (4) by means of a pressure ring screw (18) through the flange of the base (14); a nut buffer pad (17) is provided between the pressure ring (16) and the base (14); 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), so as to prevent the separation nut from rigidly colliding with the pressure ring (16), and the pressure ring screw (18) from rigidly colliding with the pressure ring (16) during the unlocking process; The working high-pressure combustion gas of the actuating gas source (8) acts on the cylinder (11) and the piston (13) through the gas channel of the intake pipe seat (15). 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) under the action of the high-pressure combustion gas. When the radial constraint of the split nut (12) by the support ring (10) is released, the split nut (12) opens radially along the sliding surface of the base (14) under the action of the piston (13), thereby releasing the axial constraint on the connecting bolt (3); the connecting bolt (3) passes through the capture bushing (31) under the action of the capture spring (33), thereby capturing the connecting bolt (3); The catcher assembly (2) comprises a catcher housing (29), a bolt sleeve (30), a catcher bushing (31), a catcher tail cover (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 catcher assembly (2) is connected to the lower connecting block (5) via a catcher screw (35); the catcher tail cover (32) is connected to the catcher housing (29) via an internal thread, and the catcher bushing (31) is fixed between the catcher tail cover (32) and the catcher housing (29); the catcher bushing (31) is provided with a plurality of spring claws (41) to realize the catch function of the connecting bolt (3); 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 the rigid collision 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; a catcher spring (33) is provided between the bolt sleeve (30) and the catcher housing (29); the catcher spring (33) is in a compressed state when the separation device is in a connected state, and the catcher spring (33) provides power for the axial movement of the connecting bolt (3) when unlocking; A through hole is provided at the center of the upper connecting block (4) for installing the shear-resistant cone sleeve (6), and a threaded hole is provided on the mounting surface for connecting with the separation 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-resistant tapered sleeve (6), and a threaded hole is provided on the mounting surface to connect with the capture assembly (2); The buffer pad (7) is arranged between the capturer assembly (2) and the mounting surface of the lower connection block (5) to reduce the impact response transmitted to the lower connection block (5) by the connection bolt (3) hitting the capturer buffer pad (34) during unlocking.

2. The multi-directional adjustable very low impact maintenance-free point separation device according to claim 1 is characterized in that: The upper connection block (4) is provided with a ball socket structure (39), which is adjusted in the circumferential direction through the ball socket-ball head structure when installed with the upper connection 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 is characterized in that: The bottom of the lower connecting block (5) is provided with a recess (40), and the number of the recesses is set as required, so as 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 with the connecting block (4); the conical surface of the shear-resistant cone sleeve (6) matches with the conical 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: A limit groove is provided at the contact position between the flywheel (26), the base (28) and the ball (27); the flywheel (26), the ball (27) and the base (28) form a bearing mechanism; and a lead screw thread is provided at the connection position between the flywheel (26) and the connecting bolt (3).

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

7. The multi-directional adjustable very low impact maintenance-free point separation device according to claim 1, characterized in that: The angle of the positioning cone surface 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) is the axial installation positioning surface of the split nut (12) and the sliding surface and guide positioning structure during the expansion process; at the same time, it is connected to the intake pipe seat (15) through an internal thread and connected to the base (28) through an external thread; a limit ring is provided on the connection surface between the base (14) and the base (28) to play an installation positioning role, avoid contact between the flywheel (26) and the base (14), and completely seal the inside of the mechanism.

9. The multi-directional adjustable very low impact maintenance-free point separation device according to claim 1, characterized in that: The air inlet pipe seat (15) is a connection inlet and working channel for the actuating air source (8), and also serves as a guide support and positioning for the movement of the cylinder (11); a "V"-shaped gas channel (38) arranged on the air inlet pipe seat (15) is connected to the axial gas channel (39).

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 separation nut compresses the nut buffer pad (17), causing the separation nut to lose contact with the mounting surface of the upper connecting block (4), isolating the impact response transmission path between the separation nut and the mounting surface of the upper connecting block (4), thereby 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 bolts (3), the supporting ring (10), the split nut (12) and the 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 supporting ring (10), the split nut (12) and the base (14) are made of 0Cr13Ni8Mo2Al, and the connecting bolts (3) are made of 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), the vibration reduction ring (9), the nut buffer pad (17), the first screw buffer pad (19), the catcher buffer pad (34) and the second screw buffer pad (36) are made of high damping rubber material, and the material power loss factor is 0.35-1.

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 connection bolt (3) passes through the bolt sleeve (30), the lower connection block (5), and the upper connection block (4), and the threaded connection capability is realized through a mechanism composed of a support ring (10), a cylinder (11), a split nut (12), and a base (14); the connection bolt (3) applies a mounting torque through an external hexagon to connect the upper and lower structures.

Images