Low-impact non-pyrotechnic satellite and rocket locking and releasing device

Abstract

A motor of the device is installed on the lower portion of a machine shell, the middle of the lower surface of a rotating disc is connected with a rotating shaft of the motor, a rotating cylinder is installed on the rotating disc, and a bearing is installed in a pit in the middle of the upper surface of the rotating disc. A supporting column on the lower surface of the pressure spring tray is inserted into an inner ring of the bearing from top to bottom, the fixed cylinder is installed in the rotating cylinder, the core rod is installed in the fixed cylinder, an annular groove is formed in the surface of the core rod, N radial through holes are formed in the side wall of the fixed cylinder, N first vertical grooves are formed in the inner side face of the rotating cylinder, and N first vertical grooves are formed in the outer side face of the rotating cylinder. The radial through hole is not communicated with the first vertical groove, the ball is located in the radial through hole and the annular groove, and the compression spring is compressed between the lower end face of the core rod and the upper surface of the compression spring tray. The motor is powered on to enable the rotating cylinder to rotate, and when the rotating cylinder rotates to the positions where the N radial through holes communicate with the N first vertical grooves correspondingly, the device is released; the device is small in impact, free of pollution, rapid in response and good in reliability.

Description

TECHNICAL FIELD

[0001] The present application relates to a star-rocket locking and releasing device, in particular to a low-impact non-explosive star-rocket locking and releasing device. BACKGROUND

[0002] In the field of satellite launching, the star-rocket locking and releasing device is used for reliable separation of the satellite from the carrier rocket after the satellite is sent to the predetermined orbit by the carrier rocket, and thus its performance is directly related to the success or failure of the launching task. According to the contact form of the docking surface, the star-rocket locking and releasing device is divided into two types of bag belt type and point type, which are respectively used for adapting to the regular shape and arbitrary shape of the star body structure. At present, the star-rocket locking and releasing device mostly uses explosive bolts and other explosives to achieve unlocking and releasing, although the structure is mature, but there are problems such as large impact, one-time use, pollution and safety hazards. With the development of micro-nano satellites and multi-satellite launching tasks, the demand for low-impact, reliability and repeated test capability of the separation device is increasingly urgent. Although the existing non-explosive schemes such as hot knife, shape memory alloy and electromagnetic lock have been improved, there are still some shortcomings such as complex structure, high energy consumption or limited response.

[0003] In the field of non-explosive star-rocket separation technology, Ren Hailei et al. use a connecting rod claw mechanism as a locking assembly of the star-rocket docking plate, a core rod with a circumferential groove, a ball, a hinge disc, a sleeve, and a spring as an unlocking assembly of the connecting rod claw mechanism, and a composite wire, a thermal resistance assembly, a spring, and a guide cylinder as a trigger, and propose a disc chain type star-rocket connection unlocking machine (Patent No. CN109050987A). When unlocking, after the composite wire is melted by the thermal resistance assembly, the spring reset force pushes the guide cylinder and the sleeve to rotate to make a pair of steel balls be squeezed into the sleeve groove along the radial direction, thereby releasing the limiting between the core rod and the hinge disc, so that the hinge disc drives the connecting rod mechanism claw to separate under the action of the thrust spring, and the separation of the star-rocket docking plate is realized. Since the small protrusions between the inner wall grooves of the sleeve and the steel balls are designed as point contact limiting, and the swing arm is limited and driven by the spring tensioned by the composite wire, the reliability is greatly reduced in the complex launch environment such as high-frequency vibration and overload, and the invention is similar to the bag belt type device and is only suitable for regular-shaped star-rocket docking surfaces, which is difficult to adapt to the launching requirements of star bodies with various structural forms.

[0004] In their paper "Shapememory alloy (SMA) actuator based separation device," Min-hyoung Lee et al. proposed a core rod-ball point-type star-rocket separation mechanism. This mechanism utilizes shape memory alloy (SMA) and a stop block as triggers. When the plate releases its restraint on the coil spring, the coil spring rotates a sleeve with a square groove on its inner wall, causing two symmetrical balls to move radially into the sleeve groove under the preload of the core rod, thus unlocking and releasing the core rod. However, the design lacks a preload support component within the stop block's slide, resulting in insufficient locking reliability. Furthermore, the shape memory alloy trigger element suffers from slow response, inconsistent action time, and low driving efficiency (10-15%). Nestor Nava et al., in their paper "REACT: Resettable Hold Down and Release Actuator for Space Applications," developed a three-stage ball point-type locking device driven by SMA. During release, the SMA is heated, causing the bottom trigger ring to rotate. This causes the third-stage steel ball to fall into the trigger ring groove, triggering a chain reaction of movement between the second-stage and first-stage steel balls. Ultimately, this releases the constraint on the intermediate core rod, completing the release. While the introduction of the third-stage steel ball increases the release load, it also increases the complexity of the device and somewhat affects its reliability. Summary of the Invention:

[0005] The technical problem to be solved by the present invention is to provide a low-impact, non-pyrotechnic star-launch locking and release device. This star-launch locking and release device not only has low impact, no pollution, can be reused, and saves ground test costs, but also can achieve rapid response and reliable locking and release.

[0006] The technical solution of the present invention:

[0007] A low-impact, non-pyrotechnic star-launch locking and releasing device includes a housing. Inside the housing are a motor, a rotating disk, a rotating cylinder, a bearing, a compression spring, a compression spring tray, a core rod, a fixed cylinder, and N balls of the same diameter, where N is a natural number greater than or equal to 1. The motor is fixedly mounted at the bottom of the housing, with its shaft vertically upwards. The lower surface of the horizontally positioned rotating disk is securely connected to the end of the motor shaft. The rotating cylinder is vertically mounted on the upper surface of the rotating disk, with its lower end face securely connected to the periphery of the upper surface of the rotating disk. The bearing is installed in a recess in the center of the upper surface of the rotating disk, with its outer ring securely connected to the sidewall of the recess via an interference fit. A vertical support column is located in the center of the lower surface of the horizontally positioned compression spring tray. The core rod is inserted into the inner ring of the bearing from top to bottom and fastened to the inner ring by an interference fit. The center lines of the motor shaft, the bearing, and the rotating cylinder all coincide. The inner surface of the rotating cylinder and the outer surface of the fixed cylinder are both cylindrical. The fixed cylinder is vertically installed inside the rotating cylinder, and the core rod is vertically installed inside the fixed cylinder. The outer diameter of the fixed cylinder is the same as the inner diameter of the rotating cylinder, and the outer diameter of the core rod is the same as the inner diameter of the fixed cylinder. The flange at the upper end of the fixed cylinder extends from the opening at the upper end of the housing and is fastened to the housing by bolts. The inner surface of the rotating cylinder and the outer surface of the fixed cylinder are clearance fits, and the inner surface of the fixed cylinder and the outer surface of the core rod are also clearance fits. A horizontal annular groove is provided on the middle surface of the core rod. The shape is an arc matching the shape of the ball. The groove depth of the annular groove is V1, and the radius of the ball is R, where R / 2 ≤ V1 ≤ R. N circular radial through holes are evenly distributed around the center of the side wall of the fixed cylinder. The centerlines of the N radial through holes are all horizontally positioned and intersect the centerline of the fixed cylinder at a single point. The height of the N radial through holes is the same as the height of the annular groove, and the inner diameter of the N radial through holes is the same as the diameter of the ball. N first vertical grooves are evenly distributed on the inner surface of the rotating cylinder. The width of the N first vertical grooves is the same as the diameter of the ball, and the groove depth of the N first vertical grooves is V2, where V1 ≤ V2 ≤ R. The upper ends of the N first vertical grooves are higher than the upper edge of the radial through holes, and the lower ends of the N first vertical grooves are lower than the diameter of the ball. Along the lower edge of the through hole, the N radial through holes and the N first vertical grooves are not interconnected. The thickness of the side wall of the fixed cylinder is W, and the diameter of the ball is D. W + V1 = D. One side of each of the N balls is located in one of the N radial through holes, and the other side of each of the N balls is located in the annular groove, thus achieving the limiting and locking of the core rod. The compression spring is compressed between the lower end face of the core rod and the upper surface of the compression spring tray. When the motor is powered on, it drives the rotating cylinder to rotate. When the rotating cylinder rotates to the position where the N radial through holes are connected to the N first vertical grooves, the outward side of each of the N balls enters the N first vertical grooves, and the inward side of each of the N balls enters the N radial through holes. The locking of the core rod is released, and the compression spring pushes the core rod upward to move out of the fixed cylinder.

[0008] The motor is a piezoelectric motor. The rotor of the motor is mounted on the stator, and the lower surface of the rotating disk is fastened to the upper end face of the rotating shaft on the upper part of the rotor.

[0009] The stator is a disc-shaped metal elastomer. The outer edge of the lower surface of the stator contains piezoelectric ceramic (PZT). The rotor is also disc-shaped. The outer edge of the upper surface of the stator contacts the outer edge of the lower surface of the rotor. The compressed spring can provide preload for the contact between the stator and rotor of the motor, which is beneficial to the normal operation of the motor.

[0010] When a piezoelectric motor is working, the inverse piezoelectric effect of piezoelectric ceramics (PZT) is used to excite two in-mode vibrations of the stator, and then the micro-vibration is converted into macro-rotation of the rotor through friction.

[0011] The housing is cylindrical in shape. A horizontal motor base is located below the motor stator, within the housing. The bottom surface of the stator is fastened to the upper surface of the motor base with screws. The motor base is disc-shaped, with M outwardly protruding blocks evenly distributed around its perimeter. M is a natural number greater than or equal to 1. The M protruding blocks are matched in position and shape with M second vertical grooves on the inner side of the housing. All M second vertical grooves extend downward to the lower end face of the housing. The M protruding blocks are located within the M second vertical grooves. A horizontally arranged circular cover plate is also installed below the motor base. The cover plate is installed inside the housing by matching the external threads on its side with the internal threads on the inner side of the housing. The cover plate surface has at least two through holes for mounting the cover plate. During use, a special wrench can be inserted into the through holes to screw the cover plate into or out of the housing. The flange at the upper end of the fixed cylinder extends from the opening at the upper end of the housing and is fastened to the flange at the upper end of the housing with bolts.

[0012] N is 4, M is 4.

[0013] The lengths of the N first vertical grooves are all equal, and the first vertical grooves extend straight upward to the upper end face of the rotating cylinder; the core rod is a round rod, the fixed cylinder and the rotating cylinder are both round cylinders, the rotating disk and the compression spring tray are both round disks, and the periphery of the compression spring tray is provided with an upward flange.

[0014] The first vertical groove has a square shape.

[0015] The low-impact non-pyrotechnic star-rocket locking and release device also includes a rocket-mounted adapter top plate, a star-body base plate, and a locking nut. The rocket-mounted adapter top plate is fastened to the flange at the lower end of the housing by bolts. The star-body base plate has a central through hole in the middle. The star-body base plate is fitted onto the core rod from the upper end through the central through hole. The locking nut is screwed into the external thread at the upper part of the core rod, pressing it onto the star-body base plate and pushing the star-body base plate toward the flange at the upper end of the fixed cylinder, so that the star-body base plate and the flange at the upper end of the fixed cylinder are in close contact.

[0016] The locking and assembly process of this low-impact, non-pyrotechnic star-launch locking and release device is as follows:

[0017] 1. Securely connect the motor base and the stator together. Then, using the protrusion on the motor base, slide the motor base and the stator to the predetermined position at the bottom of the housing along the second vertical groove on the inner side of the housing. Then, screw the cover plate into the motor base at the bottom of the housing.

[0018] 2. Secure the rotor, rotating disk, and rotating cylinder together. Then install the bearing, spring tray, and spring onto the rotating disk. Finally, install these assembled components into the housing so that the outer edge of the lower surface of the rotor contacts the outer edge of the upper surface of the stator.

[0019] 3. Insert the core rod into the fixed cylinder from top to bottom until the annular groove on the core rod is aligned with the radial through hole on the fixed cylinder, and then insert the ball bearings through the radial through hole.

[0020] 4. Align the radial through hole on the fixed cylinder with the part of the rotating cylinder that does not have the first vertical groove, insert the fixed cylinder into the rotating cylinder from top to bottom, and then fasten the flange at the upper end of the fixed cylinder to the flange at the upper end of the housing; at this time, the compression spring is compressed, providing preload force between the stator and rotor of the piezoelectric motor to ensure its self-locking capability when power is off.

[0021] 5. Fit the satellite base plate onto the core rod, then put on the lock nut and tighten it. Secure the top plate of the rocket adapter to the flange at the lower end of the housing, thus completing the satellite-rocket locking connection. At this point, the ball bearings are embedded in the annular groove on the core rod and the radial through hole on the fixed cylinder, and the device is in the locked state.

[0022] The release process of this low-impact, non-pyrotechnic star-launch locking and release device is as follows:

[0023] After the rocket sends the satellite into the predetermined orbit and receives the separation command, the circuit control system powers on the piezoelectric motor. The piezoelectric motor starts and drives the rotating cylinder to rotate. When the first vertical groove on the rotating cylinder rotates to face the radial through hole on the fixed cylinder, the ball moves radially into the first vertical groove under the preload of the compression spring. At this time, the core rod is released and moves upward to separate under the restoring force of the compression spring, thus completing the separation of the satellite from the rocket.

[0024] The beneficial effects of this invention are:

[0025] 1. This invention utilizes a motor as a trigger for locking and unlocking, driving a rotating cylinder with a first vertical groove to rotate, thereby causing the balls in the radial through hole of the fixed cylinder to move radially outward, causing the core rod to move from the limit position to release, thus realizing the locking and separation of the star and rocket. Compared with traditional pyrotechnic star and rocket locking and releasing devices, this invention has the advantages of low impact, no pollution, reusability, and saving ground test costs. Moreover, its interface has strong adaptability and has significant application value.

[0026] 2. This invention is aimed at the field of microsatellite launch and makes full use of the unique advantages of piezoelectric motors, such as fast response, high energy density, easy integration, self-locking upon power failure, and neither generating electromagnetic fields nor being subject to electromagnetic interference. This enables the invention to achieve rapid response and reliable locking and releasing.

[0027] 3. The structure of the present invention is simple and compact. Attached image description:

[0028] Figure 1 A schematic diagram of a low-impact, non-pyrotechnic star-launch locking and release device;

[0029] Figure 2 for Figure 1 A top-view structural diagram;

[0030] Figure 3 for Figure 1 A schematic diagram of the AA cross-sectional structure in the diagram;

[0031] Figure 4 This is a schematic diagram of the stator structure of the motor;

[0032] Figure 5 for Figure 4 Schematic diagram of the BB cross-sectional structure in the middle;

[0033] Figure 6 This is a three-dimensional structural diagram of the stator of an electric motor.

[0034] Figure 7 This is a schematic diagram of the rotor structure of the electric motor;

[0035] Figure 8 for Figure 7 Schematic diagram of the CC cross-section structure in the diagram;

[0036] Figure 9 This is a three-dimensional structural diagram of the motor rotor;

[0037] Figure 10 This is a schematic diagram of the motor base.

[0038] Figure 11 for Figure 10 Schematic diagram of the DD cross-sectional structure in the middle;

[0039] Figure 12 This is a three-dimensional structural diagram of the motor base;

[0040] Figure 13 This is a schematic diagram of the cover plate structure;

[0041] Figure 14 for Figure 13 Schematic diagram of the EE cross-section structure in the diagram;

[0042] Figure 15 This is a schematic diagram of the rotating cylinder.

[0043] Figure 16 for Figure 15 A top-view structural diagram;

[0044] Figure 17 for Figure 15 A schematic diagram of the structure viewed from below;

[0045] Figure 18 for Figure 15 Schematic diagram of the FF cross-sectional structure in the image;

[0046] Figure 19 This is a schematic diagram of the three-dimensional structure of the rotating cylinder;

[0047] Figure 20 This is a schematic diagram of the structure of the low-impact, non-pyrotechnic star-launch locking and release device during release. Specific implementation examples:

[0048] See Figures 1-20In the figure, the low-impact non-pyrotechnic star-launch locking and releasing device includes a housing 1. Inside the housing 1 are installed a motor, a rotating disk 2, a rotating cylinder 3, a bearing 4, a compression spring 5, a compression spring tray 6, a core rod 7, a fixed cylinder 8, and four balls 9 of the same diameter. The motor is fixedly installed at the lower part of the housing 1, with its shaft 18 vertically upwards. The lower surface of the horizontally positioned rotating disk 2 is fastened to the end of the motor shaft 18 by screws 31. The rotating cylinder 3 is vertically installed on the upper surface of the rotating disk 2, with its lower end face fastened to the periphery of the upper surface of the rotating disk 2 by screws 30. The bearing 4 is installed in a recess in the middle of the upper surface of the rotating disk 2, with its outer ring fastened to the sidewall of the recess by an interference fit. A vertical support column 10 is provided in the middle of the lower surface of the spring tray 6. The support column 10 is inserted into the inner ring of the bearing 4 from top to bottom and is fastened to the inner ring by interference fit. The center line of the motor shaft 18, the center line of the bearing 4 and the center line of the rotating cylinder 3 are all coincident. The inner side of the rotating cylinder 3 and the outer side of the fixed cylinder 8 are both cylindrical. The fixed cylinder 8 is vertically installed inside the rotating cylinder 3, and the core rod 7 is vertically installed inside the fixed cylinder 8. The outer diameter of the fixed cylinder 8 is the same as the inner diameter of the rotating cylinder 3, and the outer diameter of the core rod 7 is the same as the inner diameter of the fixed cylinder 8. The flange 11 at the upper end of the fixed cylinder 8 extends from the opening at the upper end of the housing 1 and is fastened to the housing 1 by bolts 12. The inner side of the rotating cylinder 3 and the fixed cylinder 8 The outer surfaces of the rotating cylinder 3 are fitted with a clearance fit, as are the inner surfaces of the fixed cylinder 8 and the outer surfaces of the core rod 7. A horizontal annular groove 13 is provided on the middle surface of the core rod 7. The groove shape of the annular groove 13 is an arc shape matching the shape of the ball 9. The groove depth of the annular groove 13 is V1, and the radius of the ball 9 is R, where V1 = R. Four circular radial through holes 14 are evenly distributed around the middle of the side wall of the fixed cylinder 8. The center lines of the four radial through holes 14 are all horizontally positioned and intersect the center line of the fixed cylinder 8 at a single point. The height of the four radial through holes 14 is the same as the height of the annular groove 13, and the inner diameter of the four radial through holes 14 is the same as the diameter of the ball 9. Four first vertical recesses are evenly distributed on the inner surface of the rotating cylinder 3. The width of each of the four first vertical grooves 15 is the same as the diameter of the ball 9. The depth of each of the four first vertical grooves 15 is V2, where V2 = R. The upper ends of each of the four first vertical grooves 15 are higher than the upper edge of the radial through hole 14, and the lower ends of each of the four first vertical grooves 15 are lower than the lower edge of the radial through hole 14. The four radial through holes 14 and the four first vertical grooves 15 are not connected to each other. The thickness of the side wall of the fixed cylinder 8 is W = R, and the diameter of the ball 9 is D, where W + V1 = D. One side of each of the four balls 9 is located in one of the four radial through holes 14, and the other side of each of the four balls 9 is located in the annular groove 13, thereby achieving the limiting and locking of the core rod 7. The compression spring 5 is compressed between the lower end face of the core rod 7 and the upper surface of the compression spring tray 6.When the motor is powered on, it drives the rotating cylinder 3 to rotate. When the rotating cylinder 3 rotates to the position where the four radial through holes 14 are respectively connected to the four first vertical grooves 15, the outward-facing sides of the four balls 9 enter the four first vertical grooves 15 respectively, and the inward-facing sides of the four balls 9 enter the four radial through holes 14 respectively. The locking of the core rod 7 is released, and the compression spring 5 pushes the core rod 7 upward to move out of the fixed cylinder 8.

[0049] The motor is a piezoelectric motor. The rotor 16 of the motor is mounted on the stator 17. The lower surface of the rotating disk 2 is connected to the upper end face of the rotating shaft 18 on the upper part of the rotor 16 by screws 31.

[0050] The stator 17 is a disc-shaped metal elastomer. The outer edge of the lower surface of the stator 17 contains piezoelectric ceramic (PZT). The rotor 16 is also disc-shaped. The outer edge of the upper surface of the stator 17 contacts the outer edge of the lower surface of the rotor 16. The compressed spring 5 can provide preload for the contact between the stator 17 and the rotor 16 of the motor, which is beneficial to the normal operation of the motor.

[0051] When the piezoelectric motor is working, the inverse piezoelectric effect of piezoelectric ceramic (PZT) is used to excite two same frequency mode vibrations of the stator 17, and then the micro vibration is converted into macro rotation of the rotor 16 through friction.

[0052] The housing 1 is cylindrical in shape. A horizontal motor base 19 is located below the motor stator 17, also within the housing 1. The bottom surface of the stator 17 is fastened to the upper surface of the motor base 19 by screws 20. The motor base 19 is disc-shaped, and four outwardly protruding protrusions 21 are evenly distributed around its perimeter. These four protrusions 21 correspond in position and shape to four second vertical grooves on the inner side of the housing 1. All four second vertical grooves extend downwards to the lower end face of the housing 1. The four protrusions 21 are located at four... In the second vertical groove; a horizontally arranged circular cover plate 22 is also installed under the motor base 19. The cover plate 22 is installed in the housing 1 by matching the external thread on its side with the internal thread on the inner side of the housing 1. The surface of the cover plate 22 is provided with four through holes 23 for installing the cover plate 22. When in use, a special wrench can be inserted into the through holes 23 to screw the cover plate 22 into or out of the housing 1. The flange 11 at the upper end of the fixing cylinder 8 extends from the opening at the upper end of the housing 1 and is fastened to the flange 24 at the upper end of the housing 1 by bolts 12.

[0053] The four first vertical grooves 15 are all of equal length and extend straight upward to the upper end face of the rotating cylinder 3; the core rod 7 is a round rod, the fixed cylinder 8 and the rotating cylinder 3 are both round cylinders, the rotating disk 2 and the compression spring tray 6 are both round disks, and the periphery of the compression spring tray 6 is provided with an upward flange.

[0054] The first vertical groove 15 has a square shape.

[0055] The low-impact non-pyrotechnic star-rocket locking and release device also includes a rocket-mounted adapter top plate 25, a star-body base plate 26, and a locking nut 27. The rocket-mounted adapter top plate 25 is fastened to the flange 28 at the lower end of the housing 1 by bolts 29. The star-body base plate 26 has a central through hole in the middle. The star-body base plate 26 is fitted onto the core rod 7 from the upper end of the core rod 7 through the central through hole. The locking nut 27 is screwed into the external thread at the upper part of the core rod 7, pressing on the star-body base plate 26 and pushing the star-body base plate 26 toward the flange 11 at the upper end of the fixed cylinder 8, so that the star-body base plate 26 and the flange 11 at the upper end of the fixed cylinder 8 are in close contact.

[0056] The locking and assembly process of this low-impact, non-pyrotechnic star-launch locking and release device is as follows:

[0057] 1. Securely connect the motor base 19 and the stator 17 together. Then, using the protrusion 21 on the motor base 19, slide the motor base 19 and the stator 17 to the predetermined position at the bottom of the housing 1 along the second vertical groove on the inner side of the housing 1. Then, screw the cover plate 22 into the motor base 19 at the bottom of the housing 1.

[0058] 2. Fasten the rotor 16, the rotating disk 2, and the rotating cylinder 3 together. Then install the bearing 4, the spring tray 6, and the spring 5 on the rotating disk 2. Then install these assembled parts into the housing 1 so that the outer edge of the lower surface of the rotor 16 contacts the outer edge of the upper surface of the stator 17.

[0059] 3. Insert the core rod 7 into the fixed cylinder 8 from top to bottom until the annular groove 13 on the core rod 7 is aligned with the radial through hole 14 on the fixed cylinder 8, and then insert the ball bearing 9 through the radial through hole 14.

[0060] 4. Align the radial through hole 14 on the fixed cylinder 8 with the part of the rotating cylinder 3 that does not have the first vertical groove 15, insert the fixed cylinder 8 into the rotating cylinder 3 from top to bottom, and then fasten the flange 11 at the upper end of the fixed cylinder 8 to the flange 24 at the upper end of the housing 1. At this time, the compression spring 5 is compressed, providing preload force between the stator 17 and the rotor 16 of the piezoelectric motor to ensure its self-locking capability when power is off.

[0061] 5. Mount the satellite base plate 26 onto the core rod 7, then install and tighten the locking nut 27 to secure the rocket adapter top plate 25 to the flange 28 at the lower end of the housing 1, thus completing the satellite-rocket locking connection. At this point, the ball bearings 9 are embedded in the annular groove 13 on the core rod 7 and the radial through hole 14 on the fixed cylinder 8, and the device is in a locked state.

[0062] The release process of this low-impact, non-pyrotechnic star-launch locking and release device is as follows:

[0063] After the rocket sends the satellite into the predetermined orbit and receives the separation command, the circuit control system powers on the piezoelectric motor. The piezoelectric motor starts and drives the rotating cylinder 3 to rotate. When the first vertical groove 15 on the rotating cylinder 3 rotates to face the radial through hole 14 on the fixed cylinder 8, the ball bearing 9 moves radially into the first vertical groove 15 under the preload of the compression spring 5. At this time, the core rod 7 is released and moves upward to separate under the restoring force of the compression spring 5, thus completing the separation of the satellite and the rocket.

Claims

1. A low-impact non-explosive star-rocket locking and releasing device, comprising a shell, characterized in that: The shell is internally provided with a motor, a rotating disc, a rotating drum, a bearing, a compression spring, a compression spring tray, a core rod, a fixed drum and N balls with the same diameter, wherein N is a natural number greater than or equal to 1; the motor is fixedly installed at the lower part of the shell, the rotating shaft of the motor is vertically upward, the lower surface of the horizontally arranged rotating disc is tightly connected with the end of the rotating shaft of the motor, the rotating drum is vertically installed on the upper surface of the rotating disc, the lower end surface of the rotating drum is tightly connected with the periphery of the upper surface of the rotating disc, the bearing is installed in the pit in the middle of the upper surface of the rotating disc, the outer ring of the bearing is tightly connected with the side wall of the pit, the lower surface of the horizontally arranged compression spring tray is provided with a vertical support column in the middle, the support column is inserted into the inner ring of the bearing from top to bottom and is tightly connected with the inner ring, the center line of the rotating shaft of the motor, the center line of the bearing and the center line of the rotating drum are coincided together; the inner surface of the rotating drum and the outer surface of the fixed drum are both cylindrical surfaces, the fixed drum is vertically installed inside the rotating drum, the core rod is vertically installed inside the fixed drum, the outer diameter of the fixed drum is the same as the inner diameter of the rotating drum, the outer diameter of the core rod is the same as the inner diameter of the fixed drum, the flange at the upper end of the fixed drum is extended out of the opening at the upper end of the shell and is tightly connected with the shell together; a ring-shaped groove is arranged on the middle surface of the core rod, the groove shape of the ring-shaped groove is an arc shape matched with the shape of the ball, the groove depth of the ring-shaped groove is V1, the radius of the ball is R, R / 2≤V1≤R, N circular radial through holes are uniformly arranged around the middle part of the side wall of the fixed drum, the center lines of the N radial through holes are horizontally arranged and intersect with the center line of the fixed drum at a point, the heights of the N radial through holes are the same as the height of the ring-shaped groove, the inner diameters of the N radial through holes are the same as the diameter of the ball; N first vertical grooves are uniformly arranged on the inner surface of the rotating drum, the widths of the N first vertical grooves are the same as the diameter of the ball, the groove depths of the N first vertical grooves are V2, V1≤V2≤R, the upper ends of the N first vertical grooves are higher than the upper edge of the radial through hole, the lower ends of the N first vertical grooves are lower than the lower edge of the radial through hole, the N radial through holes and the N first vertical grooves are not communicated with each other, the thickness of the side wall of the fixed drum is W, the diameter of the ball is D, W+V1=D, one side of the N balls is respectively located in the N radial through holes, the other side of the N balls is respectively located in the ring-shaped groove, the compression spring is compressed between the lower end surface of the core rod and the upper surface of the compression spring tray; when the motor is powered on and operates, the rotating drum is driven to rotate, when the rotating drum rotates to the position where the N radial through holes are respectively communicated with the N first vertical grooves, the outer side of the N balls respectively enters into the N first vertical grooves, the inner side of the N balls respectively enters into the N radial through holes, the compression spring pushes the core rod to move upward out of the fixed drum. ​ 2. The low-impact non-initiation pyrotechnic star-rocket locking release device according to claim 1, characterized in that: The motor is a piezoelectric motor, the rotor of the motor is installed on the stator, the lower surface of the rotating disc is tightly connected with the upper end surface of the rotating shaft of the upper part of the rotor.

3. The low-impact non-explosive star-rocket locking release device according to claim 2, characterized in that: The stator is a disc-shaped metal elastic body, the lower surface of the stator contains piezoelectric ceramics, the shape of the rotor is also disc-shaped, the outer edge of the upper surface of the stator is in contact with the outer edge of the lower surface of the rotor.

4. The low-impact non-explosive star-rocket locking release device according to claim 2, characterized in that: The shape of the shell is cylindrical, the stator of the motor is provided with a horizontal motor base below, the motor base is also located in the shell, the bottom surface of the stator is tightly connected with the upper surface of the motor base, the motor base is disc-shaped, the periphery of the motor base is provided with M outwardly protruding protruding blocks, M is a natural number greater than or equal to 1, the M protruding blocks are respectively matched with the position and shape of the M second vertical grooves in the inner side surface of the shell, the M second vertical grooves are all straight down to the lower end surface of the shell, and the M protruding blocks are respectively located in the M second vertical grooves; the lower surface of the motor base is further provided with a horizontally arranged circular cover plate, the cover plate is mounted in the shell through the matching between the outer threads on the side surface of the cover plate and the inner threads on the inner side surface of the shell; the flange on the upper end of the fixed cylinder extends out of the opening on the upper end of the shell and is tightly connected with the flange on the upper end of the shell.

5. The low-impact non-explosive star-rocket locking release device according to claim 1, characterized in that: The N is 4.

6. The low-impact non-explosive star-rocket locking release device of claim 1, wherein: The lengths of the N first vertical grooves are equal, and the first vertical grooves are straight up to the upper end surface of the rotating cylinder; the core rod is a circular rod, the fixed cylinder and the rotating cylinder are both cylindrical, the rotating disc and the compression spring tray are both disc-shaped, and the periphery of the compression spring tray is provided with an upward turned edge.

7. The low-impact non-explosive star-rocket locking release device of claim 1, wherein: The slot shape of the first vertical groove is square.

8. The low-impact non-explosive star-rocket locking release device according to claim 4, characterized in that: The arrow-carrying adapter top plate, the star bottom plate and the locking nut are further included, the arrow-carrying adapter top plate is tightly connected with the flange on the lower end of the shell through bolts, the central portion of the star bottom plate is provided with a central through hole, the star bottom plate is sleeved on the core rod from the upper end of the core rod through the central through hole, the locking nut is screwed from the outer threads on the upper portion of the core rod, is pressed on the star bottom plate, and pushes the star bottom plate to the flange on the upper end of the fixed cylinder, so that the star bottom plate and the flange on the upper end of the fixed cylinder are tightly contacted.

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