An electromagnetically actuated compression release device

Abstract

The present invention discloses an electromagnetically actuated compression and release device, which belongs to the field of aerospace technology and includes a first housing, a second housing, a locking bolt, and a locking nut. The first housing is provided with a first cylinder for axial movement of the locking nut, the first cylinder is provided with a limiting structure for limiting the circumferential rotation of the locking nut, and the first housing is also provided with an electromagnetic actuation structure for locking the locking nut in the first cylinder; the second housing is provided with a second cylinder for axial movement of the locking bolt, the head of the locking bolt is limited to the end of the second cylinder away from the second housing, and the screw of the locking bolt passes through the second cylinder and is threadedly connected to the locking nut. The present invention can achieve the connection between the first housing and the second housing after the locking bolt is connected to the locking nut, thereby achieving the connection between the two components. Since the locking nut is limited in circumferential rotation, a pre-tightening torque can be applied when connecting the locking bolt and the locking nut, thereby improving the connection stability of the two components.

Description

Technical Field

[0001] The present invention relates to the field of aerospace technology, and in particular to an electromagnetically actuated compression and release device. Background Art

[0002] In the field of aerospace technology, the compression and release device is the core component of the spacecraft mechanism system, which usually includes pyrotechnic compression and release devices and non-pyrotechnic compression and release devices.

[0003] The non-pyrotechnic compression and release device, a single-point device that uses non-pyrotechnic separation technology to connect and disconnect spacecraft components, is a core component of space connection and separation systems and is primarily used for the deployment and separation of components such as solar panels, communication antennas, and instrument covers. Compared to traditional pyrotechnic compression and release devices, non-pyrotechnic compression and release devices offer low impact, simplicity, reliability, reusability, and low cost.

[0004] The existing non-pyrotechnic compression and release devices mainly include:

[0005] 1) Memory alloy compression release devices use memory alloy (SMA) materials to trigger unlocking by changing shape at high and low temperatures. Their main drawback is a narrow operating temperature range, making them prone to stress relaxation and creep.

[0006] 2) Thermally cut compression release devices release the lock by melting a wire or fiber material. Common examples include fiber-wire binding and split-nut mechanisms. The main disadvantages are that they are not reusable and pose risks such as wire overlap and self-tie.

[0007] 3) Paraffin-actuated compression release device, which mainly uses the volume expansion of paraffin from solid to liquid to actuate unlocking. Its main disadvantages are slow response, poor synchronization, high power consumption, and high operating temperature requirements.

[0008] In addition, a Chinese patent application with publication number CN 112357128 A discloses a non-pyrotechnic, low-impact electromagnetic locking and releasing device. This device uses a non-pyrotechnic electromagnetic drive principle to lock, connect, and separate a two-stage separation system. However, the two-stage separation system can only achieve preliminary locking when connected, and cannot achieve torque locking, resulting in low connection stability. Summary of the Invention

[0009] The present invention intends to provide an electromagnetically actuated compression and release device to solve the problems raised in the above-mentioned background technology. The locking nut is installed on the first shell through an electromagnetic actuation structure, and the locking bolt is installed on the second shell. After the locking bolt is connected to the locking nut, the connection between the first shell and the second shell can be achieved, and then the connection between the two components can be achieved. Since the locking nut is limited to circumferential rotation, a pre-tightening torque can be applied when connecting the locking bolt and the locking nut, thereby improving the connection stability of the two components.

[0010] In order to achieve the above object, the present invention provides the following technical solutions:

[0011] The present invention provides an electromagnetically actuated compression and release device, comprising a first shell, a second shell, a locking bolt and a locking nut, wherein the first shell is provided with a first cylinder for axial movement of the locking nut, the first cylinder is provided with a limiting structure for limiting the circumferential rotation of the locking nut, and the first shell is further provided with an electromagnetic actuation structure for locking the locking nut in the first cylinder; the second shell is provided with a second cylinder for axial movement of the locking bolt, the head of the locking bolt is limited to the end of the second cylinder away from the second shell, and the screw of the locking bolt passes through the second cylinder and is threadedly connected to the locking nut.

[0012] Preferably, it also includes a release spring end cover and a release spring, the release spring is arranged on the outer diameter side of the second cylinder, the release spring end cover is arranged between the head of the locking bolt and the second cylinder, one end of the release spring is connected to the release spring end cover, and the other end of the release spring is connected to the second shell.

[0013] Preferably, the electromagnetic actuation structure includes a locking ball, a movable sleeve and an electromagnet 27. A through hole 28 for radial movement of the locking ball is provided on the wall of the first cylinder. The outer peripheral side of the locking nut is provided with a slope surface for pushing the locking ball to move toward the movable sleeve. The movable sleeve is sleeved on the outer diameter side of the first cylinder and can move axially relative to the first cylinder. The inner diameter side of the movable sleeve is provided with a first groove for the locking ball to be inserted and a second groove for axial locking of the electromagnet 27. When the second groove is locked, the first groove is misaligned with the through hole 28.

[0014] Preferably, it also includes an unlocking spring, one end of which is connected to the first shell, and the other end of which is connected to the movable sleeve. When the second slot is unlocked, the unlocking spring pushes the movable sleeve to move, and the first slot can move to a position corresponding to the through hole 28.

[0015] Preferably, it also includes a ball cover and a ball cover spring located on the inner diameter side of the first cylinder, the ball cover is located on the side of the locking nut away from the locking bolt, one end of the ball cover spring is connected to the ball cover, and the other end of the ball cover spring is connected to the first shell, when the locking nut is locked, the ball cover is misaligned with the through hole 28, and when the locking nut is unlocked, the ball cover can move to a position corresponding to the through hole 28 under the action of the ball cover spring.

[0016] Preferably, the electromagnet is located on the inner diameter side of the movable sleeve, and the electromagnet includes an electromagnetic coil and a core iron. The core iron is connected to a locking pin, and the locking pin enters and exits the second slot in the radial direction.

[0017] Preferably, the end of the core iron away from the locking pin is connected to a pre-tightening piston, and the pre-tightening piston is connected to a pre-tightening spring. The core iron can push the locking pin 29 into the second groove under the elastic force of the pre-tightening spring, and the core iron can overcome the elastic force of the pre-tightening spring to disengage the locking pin 29 from the second groove.

[0018] Preferably, a core iron liner is further provided on the outer diameter side of the core iron, and the core iron liner is made of a self-lubricating non-metallic material.

[0019] Preferably, the first groove is a first annular groove opened on the movable sleeve, and the cross section of the first annular groove is arc-shaped; the second groove is a second annular groove opened on the movable sleeve, and the cross section of the second annular groove is rectangular.

[0020] Preferably, it also includes a limit protection cover, which is installed on the second shell, and the locking bolt is located in the limit protection cover. An in-position indicator device is provided in the limit protection cover, and the in-position indicator device is used to judge the locking and unlocking status according to the position of the locking bolt.

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

[0022] The present invention installs the locking nut on the first shell through an electromagnetic actuation structure, and installs the locking bolt on the second shell. After the locking bolt is connected to the locking nut, the connection between the first shell and the second shell can be achieved, and then the connection between the two components where the first shell and the second shell are respectively located can be achieved. Since the locking nut is limited to circumferential rotation, a pre-tightening torque can be applied when connecting the locking bolt and the locking nut, thereby improving the connection stability of the two components. By controlling the electromagnetic actuation structure to unlock the locking nut, the locking nut can be separated from the first shell, and then the two components can be unlocked.

[0023] Other technical solutions included in the present invention can also achieve the following technical effects:

[0024] The electromagnet 27 of the present invention includes a core iron and an electromagnetic coil, which can lock two components that need to be separated on the track during the ground stage. After being on the track, it only needs to be energized to make the electromagnetic coil generate a magnetic field to attract the core iron to move, which can trigger the unlocking of the entire device. It has the characteristics of fast response, small size, small impact, and rich usage scenarios. Moreover, the use of electromagnetic drive can greatly reduce the unlocking impact load, increase the service life of the clamping and releasing device, and reduce the risk of failure of high-precision detection equipment.

[0025] The present invention utilizes the slope surface of the locking nut to push the locking ball to move along the through hole 28 toward the first groove, and utilizes the first groove to accommodate the locking ball. Due to the use of electromagnetic unlocking, power is instantly applied when unlocking on track and power is cut off after unlocking, so the energy required is small. The overall characteristics include low unlocking impact, wide applicable temperature, fast response, safety and energy saving, simple structure, reliable connection, reusability and rapid recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the core iron movement after power is applied during the unlocking process;

[0028] Figure 3 Schematic diagram of the movement of the movable sleeve during the unlocking process;

[0029] Figure 4 Schematic diagram of the locking ball movement during the unlocking process;

[0030] Figure 5 Schematic diagram of the movement of the locking bolt and locking nut, unlocking, and separation of the separation surfaces during the unlocking process;

[0031] Figure 6 This is a schematic diagram of applying external force during the installation of the lock nut;

[0032] Figure 7 This is a schematic diagram of applying external force during the installation of the lock nut;

[0033] Figure 8 This is a diagram showing the locking nut being installed in place;

[0034] Figure 9 For Example 1 Figure 8 A top view of

[0035] Figure 10 For Example 2 Figure 8 A top view of

[0036] Figure 11 This is a schematic diagram showing the torque applied during the installation of the locking bolt and the locking bolt being installed in place;

[0037] Figure 12 This invention discloses the working principle of the in-place indication device.

[0038] The reference numerals in the drawings of the specification include:

[0039] 1. Locking bolt; 2. First housing; 3. Locking nut; 4. Locking ball; 5. Ball cover; 6. Electromagnetic coil; 7. Core iron; 8. Core iron bushing; 9. Position limiting protection cover; 10. In-position indicator; 11. Release spring end cover; 12. Release spring; 13. Second housing; 14. Unlocking spring; 15. Movable sleeve; 16. Ball cover spring; 17. Preload spring; 18. Preload piston; 19. Preload spring cover; 20. Coil wire; 21. First cylinder; 22. Second cylinder; 23. Part one; 24. Part two; 25. First slot; 26. Second slot; 27. Electromagnet; 28. Through hole; 29. ​​Locking pin. DETAILED DESCRIPTION

[0040] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments:

[0041] The purpose of the present invention is to provide an electromagnetically actuated clamping and releasing device to solve the problems existing in the prior art. The locking nut is installed on the first shell through an electromagnetic actuation structure, and the locking bolt is installed on the second shell. After the locking bolt is connected to the locking nut, the connection between the first shell and the second shell can be realized, and then the connection between the two components can be realized. Since the locking nut is limited to circumferential rotation, a pre-tightening torque can be applied when connecting the locking bolt and the locking nut, thereby improving the connection stability of the two components.

[0042] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0043] like Figures 1 to 12 As shown, the present invention provides an electromagnetically actuated compression and release device, comprising a first shell 2, a second shell 13, a locking bolt 1 and a locking nut 3. The first shell 2 is used to connect component one 23, and the second shell 13 is used to connect component two 24. After the first shell 2 and the second shell 13 are locked and connected, component one 23 and component two 24 are compressed and connected. Specifically, the first shell 2 is provided with a first cylinder 21 for axial movement of the locking nut 3, and the first cylinder 21 is provided with a limiting structure for limiting the circumferential rotation of the locking nut 3. That is to say, the locking nut 3 can move freely in the axial direction within the first cylinder 21 and is restricted from rotating in the circumferential direction, so that the locking bolt 1 can be tightened to connect the locking nut 3; the matching method of the first cylinder 21 and the locking nut 3 can refer to Figure 9 and Figure 10As shown, the locking nut 3 is provided with an axial groove, and a stopper is provided on the inner diameter side of the first barrel 21 to cooperate with the groove. Alternatively, the locking nut 3 has a cut edge, in which case a protrusion is provided on the inner diameter side of the first barrel 21 to cooperate with the cut edge. The first housing 2 is also provided with an electromagnetic actuation structure for locking the locking nut 3 within the first barrel 21. The electromagnetic actuation structure can engage with the locking nut 3 to achieve direct locking of the locking nut 3, or indirectly lock the locking nut 3 by controlling the position of the locking ball 4. Regardless of which method is adopted, the advantages of electromagnetic control, such as fast response, small size, and low impact, are utilized. The second housing 13 is provided with a second barrel 22 for axial movement of the locking bolt 1. The locking bolt 1 itself includes a screw and a head. The head diameter is larger than the screw diameter. The head is confined to the end of the second barrel 22 away from the second housing 13. When the screw passes through the second barrel 22 and is threadedly connected to the locking nut 3, the first housing 2 and the second housing 13 can be connected.

[0044] The present invention installs the locking nut 3 on the first shell 2 through an electromagnetic actuation structure, and installs the locking bolt 1 on the second shell 13. After the locking bolt 1 is connected to the locking nut 3, the connection between the first shell 2 and the second shell 13 can be achieved, thereby realizing the connection between the two components (component one 23 and component two 24) where the first shell 2 and the second shell 13 are respectively located. Since the locking nut 3 is limited to circumferential rotation, a pre-tightening torque can be applied when connecting the locking bolt 1 and the locking nut 3, thereby improving the connection stability of the two components. In addition, by controlling the electromagnetic actuation structure to unlock the locking nut 3, the locking nut 3 can be separated from the first shell 2, thereby realizing the unlocking of the two components.

[0045] The present invention utilizes a locking bolt 1 and a locking nut 3 in a threaded connection to achieve locking of component one 23 and component two 24. The electromagnetically actuated compression release device is relatively small in size, has a large threaded connection bearing capacity, and is applicable to a variety of scenarios. The present invention uses an electromagnetically actuated structure to unlock, which is different from pyrotechnic explosion and hot knife melting unlocking methods. It does not release other gases or particles. It is instantly powered on when unlocking and powered off after unlocking, and there is almost no electromagnetic pollution. The unlocking and locking of the present invention are repeatable, which is different from hot knife, pyrotechnic or memory alloy unlocking (hot knife and pyrotechnic are both disposable, and parts need to be replaced after unlocking. The number of times memory alloy unlocking can be used is strictly limited).

[0046] The electromagnetically actuated compression release device may further include a release spring end cap 11 and a release spring 12. The release spring 12 is disposed on the outer diameter side of the second cylindrical body 22 and is coaxially arranged with the second cylindrical body 22. The release spring end cap 11 is disposed between the head of the locking bolt 1 and the second cylindrical body 22. The release spring end cap 11 supports the locking bolt 1 and transmits the elastic force of the release spring 12 to the locking bolt 1. Specifically, when the release spring 12 is connected, one end of the release spring 12 can be connected to the release spring end cap 11, and the other end of the release spring 12 can be connected to the second housing 13. Thus, in the locked state, the head of the locking bolt 1 compresses the release spring 12 through the release spring end cap 11. During the unlocking process, the release spring 12 moves the locking bolt 1 away from the first housing 2 through the release spring end cap 11. The release spring end cap 11 is only in abutment connection with the head of the locking bolt 1. That is, the locking bolt 1 can rotate relative to the release spring end cap 11, thereby facilitating the connection of the locking bolt 1 with the lock nut 3 after torque is applied during locking.

[0047] The electromagnetic actuation structure can use indirect control when tightening the lock nut 3. In this case, it can include a locking ball 4, a movable sleeve 15, and an electromagnet 27. The wall of the first cylinder 21 is provided with a through hole 28 for radial movement of the locking ball 4. The through hole 28 can be in the form of a square hole, a circular hole, etc., and the diameter or width range can allow the locking ball 4 to pass smoothly. The outer circumference of the lock nut 3 is provided with a ramp surface for pushing the locking ball 4 toward the movable sleeve 15. The ramp surface should also have the function of axial limiting. That is, the lock nut 3 can only move axially after the locking ball 4 is radially freed from the limit. At this time, the ramp surface can be used to push the locking ball 4 to move, and the lock nut 3 can be unlocked smoothly. The movable sleeve 15 is sleeved on the outer diameter side of the first cylinder 21 and can move axially relative to the first cylinder 21. The inner diameter side of the movable sleeve 15 is provided with a first groove 25 for the locking ball 4 to be engaged and a second groove 26 for axial locking by the power supply magnet 27. When the second groove 26 is locked by the electromagnet 27, the first groove 25 is misaligned with the through hole 28. At this time, the movable sleeve 15 limits the radial position of the locking ball 4 to ensure that the locking ball 4 locks the locking nut 3; when the electromagnet 27 unlocks the second groove 26, the movable sleeve 15 moves axially, and the first groove 25 can correspond to the through hole 28. At this time, the locking ball 4 can enter the first groove 25 to release the lock on the locking nut 3. It should be noted that: the wall thickness of the first cylinder 21 should be smaller than the diameter of the locking ball 4. When in the locked state, the movable sleeve 15 is used to block the through hole 28, so that the locking ball 4 is extended to the inner diameter side of the first cylinder 21 to clamp the locking nut 3. When in the released state, the first groove 25 of the movable sleeve 15 is used to accommodate a part of the locking ball 4, so as to release the locking nut 3; since the locking ball 4 is always partially located in the cylinder wall (through hole 28) of the first cylinder 21, it is convenient to reset the locking ball 4, and even facilitate the reset of the entire device.

[0048] The locking mechanism may further include an unlocking spring 14, one end of which is connected to the first housing 2, and the other end of which is connected to the movable sleeve 15. The unlocking spring 14 provides the power for the axial movement of the movable sleeve 15 when unlocked. In the locked state, the movable sleeve 15 compresses the unlocking spring 14, at which point the movable sleeve 15 is locked by the electromagnet 27. When the electromagnet 27 unlocks the second slot 26 of the movable sleeve 15, the unlocking spring 14 pushes the movable sleeve 15 axially, at which point the first slot 25 of the movable sleeve 15 can move to a position corresponding to the through hole 28, thereby changing the radial position of the locking ball 4 and unlocking the locking nut 3.

[0049] It can also include a ball cover 5 and a ball cover spring 16 located on the inner diameter side of the first cylinder 21. The ball cover 5 is used to form a baffle on the inner diameter side of the through hole 28 opened on the first cylinder 21, and together with the movable sleeve 15, it confines the locking ball 4 in the through hole 28 to prevent the locking ball 4 from disengaging from the through hole 28 when in the unlocked state, which can facilitate the resetting of the locking ball 4, thereby facilitating the resetting of the entire device. Specifically, the ball cover 5 is located on the side of the locking nut 3 away from the locking bolt 1, one end of the ball cover spring 16 is connected to the ball cover 5, and the other end of the ball cover spring 16 is connected to the first shell 2 (which can be connected to a baffle connected to the first shell 2 or to the outer shell of the electromagnet 27 connected to the first shell 2). When the locking nut 3 is locked, the ball cover 5 is pushed by the locking nut 3 to a position misaligned with the through hole 28. At this time, the ball cover spring 16 is compressed; when the locking nut 3 is unlocked, the ball cover 5 can move to the position corresponding to the through hole 28 under the action of the ball cover spring 16, thereby limiting the locking ball 4.

[0050] When setting the electromagnet 27, the electromagnet 27 can be set on the inner diameter side of the movable sleeve 15. The electromagnet 27 includes an electromagnetic coil 6, a core iron 7 and an outer shell. The outer shell is fixedly mounted on the first shell 2. The moving direction of the core iron 7 is preferably perpendicular to the axial direction of the movable sleeve 15. The core iron 7 is connected to a locking pin 29 (the locking pin 29 can be a part of the core iron 7). Through the movement of the core iron 7, the locking pin 29 can be controlled to radially enter and exit the second groove 26, thereby achieving effective locking of the movable sleeve 15.

[0051] The action of the locking bolt 1 of the present invention can be achieved by the release spring 12, the action of the movable sleeve 15 can be achieved by the unlocking spring 14, and the action of the ball cover 5 can be achieved by the ball cover spring 16. After the electromagnet 27 unlocks the movable sleeve 15, the release spring 12, the unlocking spring 14 and the ball cover spring 16 act respectively to unlock the device. During the process, only the electromagnet 27 needs to be controlled, and the unlocking response is fast. After the electromagnetic coil 6 is energized, a magnetic field will be generated to attract the core iron 7 to move and thereby unlock. The unlocking time is less than 1s, and it has the characteristics of low unlocking impact, wide applicable temperature, fast response, safety and energy saving, simple structure, reliable connection, reusability and fast recovery.

[0052] Furthermore, the end of the core iron 7 away from the locking pin 29 can be connected to a pre-tightening piston 18, which can be installed in the piston cylinder and can slide freely. The pre-tightening piston 18 is also connected to one end of the pre-tightening spring 17, and the other end of the pre-tightening spring 17 can be connected to a pre-tightening spring cover 19. The pre-tightening spring cover 19 is installed at the end of the piston cylinder or connected to the outer shell of the electromagnet 27 or connected to the first shell 2 for fixation. Of course, the pre-tightening spring cover 19 can also be omitted, and the other end of the pre-tightening spring 17 can be directly connected to the above position for fixation. The pre-tightening force of the pre-tightening piston 18 can be applied by the pre-tightening spring 17, and then in the locked state, the core iron 7 can push the locking pin 29 into the second groove 26 under the elastic force of the pre-tightening spring 17 and stably confine the locking pin 29 in the second groove 26. When unlocking, under the action of the electromagnetic force, the core iron 7 can overcome the elastic force of the pre-tightening spring 17 and disengage the locking pin 29 from the second groove 26. In the locked state, the core iron 7 is always subject to the elastic force of the preload spring 17 to avoid vibration during transportation or launching of the active section, which may cause the core iron 7 to move, thereby preventing the entire device from being locked incorrectly.

[0053] A core iron bushing 8 may also be provided on the outer diameter side of the core iron 7. The core iron bushing 8 can guide the movement of the core iron 7 and reduce the friction during the movement of the core iron 7. The core iron bushing 8 can be made of a self-lubricating non-metallic material. The self-lubricating material can be PEEK. PEEK is a special engineering plastic with excellent properties such as high temperature resistance, self-lubrication, easy processing, and high mechanical strength.

[0054] In a more preferred embodiment, the first groove 25 can be a first annular groove formed on the movable sleeve 15, and the cross-section of the first annular groove can be arc-shaped to facilitate the entry and exit of the locking ball 4. The second groove 26 is a second annular groove formed on the movable sleeve 15, and the cross-section of the second annular groove can be rectangular to facilitate axial positioning of the locking pin 29 of the core iron 7.

[0055] It can also include a limit protection cover 9, which is installed on the second shell 13 and is used to protect components such as the locking bolt 1 and the release spring 12. A position indicator 10 is provided in the limit protection cover 9. When in the locked state, the position indicator 10 indicates a locking signal. When in the unlocked state, the locking bolt 1 moves toward the position indicator 10, and the position indicator 10 receives a signal that the locking bolt 1 is released. Thus, the position indicator 10 can judge the locking and unlocking states according to the position of the locking bolt 1. The working principle of the position indicator 10 is as follows: after unlocking, the spring is closed, and the voltages at both ends A and B are low. When locked, the spring is not closed, and the voltages at both ends A and B are high. Before ground launch, it is in the locked state, and the signal is high at this time. It becomes low after being unlocked in orbit. The default high level indicates the locked state, and the low level indicates the unlocking completion state.

[0056] like Figures 2 to 5 As shown in the figure, the unlocking process of the on-track electromagnetic actuated clamping release device:

[0057] 1. The core iron 7 moves when power is applied;

[0058] Controlled by the power supply relay, a given voltage is inputted at both ends of the coil conductor 20. When the electromagnetic coil 6 is energized, a magnetic field is generated, which drives the core iron 7 to move away from the second slot 26. The movement of the core iron 7 drives the preload piston 18 to move, and the preload spring 17 is compressed. The formula for the magnitude of the force on the core iron 7 is:

[0059]

[0060] Where: N is the number of coil turns, I is the current intensity (A), μ0 is the vacuum permeability value of 4π×10 -7 Wb / Am, S is the cross-sectional area of ​​the magnetic circuit (m2), Kf is the magnetic leakage coefficient (the value is determined by the composition of the magnetic circuit, usually 1.2-5 in the design of solenoid valves), and δ is the air gap length (m).

[0061] 2. After the core iron 7 moves, the movable sleeve 15 is released to move;

[0062] The core iron 7 moves under the action of the electromagnetic force, the locking pin 29 of the core iron 7 is pulled out from the second groove 26 of the movable sleeve 15, and the movable sleeve 15 moves away from the second housing 13 under the elastic force of the unlocking spring 14.

[0063] 3. After the movable sleeve 15 moves, the locking ball 4 rolls into the first groove 25 of the movable sleeve 15;

[0064] After the movable sleeve 15 moves under the elastic force of the unlocking spring 14 , the locking ball 4 rolls into the first groove 25 of the movable sleeve 15 under the action of the slope component of the locking nut 3 .

[0065] 4. After the locking ball 4 enters the first groove 25, the locking nut 3 and the locking bolt 1 move together in a direction away from the first housing 2;

[0066] After locking ball 4 enters first groove 25, locking nut 3 and locking bolt 1 move together under the elastic force of release spring 12, separating component 1 23 from component 2 24. Release spring end cap 11 contacts in-position indicator 10, causing the in-position indicator 10 to change state, indicating unlocked position. Ball cover 5, under the action of ball cover spring 16, moves to through hole 28 of first cylinder 21, preventing locking ball 4 from disengaging through hole 28 after unlocking, thereby facilitating the reset of the compression release mechanism.

[0067] like Figures 6-8 As shown in the figure, the locking and resetting process of the electromagnetically actuated compression release device:

[0068] 1. Unscrew the lock nut 3;

[0069] Unscrew the locking nut 3 from the locking bolt 1 and place it into the first housing 2 .

[0070] 2. Use the special ejector rod to reset the lock nut 3;

[0071] Apply external force N1 to press the locking nut 3 into the first cylinder 21, so that the locking ball 4 can move freely and be retained. Then apply external force N2, the movable sleeve 15 moves axially, and the locking ball 4 is pushed to the slope surface position of the locking nut 3. At the same time, the core iron 7 slides into the second groove 26 of the movable sleeve 15 under the thrust of the preload spring 17 and the preload piston 18, locks it, and the first shell 2 is restored.

[0072] 3. Close component 1 23 and component 2 24;

[0073] Use a tool to screw locking bolt 1 into locking nut 3. Locking nut 3 is restrained from rotation by first cylinder 21. Locking bolt 1 and locking nut 3 rotate relative to each other. Tighten locking bolt 1 and apply a corresponding torque to close the separation surfaces and lock the lock in place. The state of locking indicator 10 changes, indicating that the lock is in place.

[0074] The above is only an embodiment of the present invention, and the common knowledge such as the specific technical solutions and / or characteristics in the solution are not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several variations and improvements can be made, which should also be regarded as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the description can be used to interpret the content of the claims.

Claims

1. An electromagnetically actuated compression release device, characterized in that: The invention comprises a first shell (2), a second shell (13), a locking bolt (1) and a locking nut (3), wherein the first shell (2) is provided with a first cylinder (21) for axial movement of the locking nut (3), the first cylinder (21) is provided with a limiting structure for limiting the circumferential rotation of the locking nut (3), and the first shell (2) is further provided with an electromagnetic actuation structure for locking the locking nut (3) in the first cylinder (21); the second shell (13) is provided with a second cylinder (22) for axial movement of the locking bolt (1), the head of the locking bolt (1) is limited to the end of the second cylinder (22) away from the second shell (13), and the screw of the locking bolt (1) passes through the second cylinder (22) and is threadedly connected to the locking nut (3); It also includes a release spring (12) end cover (11) and a release spring (12), wherein the release spring (12) is arranged on the outer diameter side of the second cylinder (22), the release spring (12) end cover (11) is arranged between the head of the locking bolt (1) and the second cylinder (22), one end of the release spring (12) is connected to the release spring (12) end cover (11), and the other end of the release spring (12) is connected to the second housing (13); The electromagnetic actuation structure includes a locking ball (4), a movable sleeve (15) and an electromagnet (27); a through hole (28) for radial movement of the locking ball (4) is provided on the wall of the first cylinder (21); a slope surface for pushing the locking ball (4) toward the movable sleeve (15) is provided on the outer peripheral side of the locking nut (3); the movable sleeve (15) is sleeved on the outer diameter side of the first cylinder (21) and can move axially relative to the first cylinder (21); a first groove (25) for the locking ball (4) to be inserted and a second groove (26) for axial locking of the electromagnet (27) are provided on the inner diameter side of the movable sleeve (15); when the second groove (26) is locked, the first groove (25) and the through hole (28) are misaligned.

2. The electromagnetically actuated compression release device according to claim 1, characterized in that: It also includes an unlocking spring (14), one end of which is connected to the first housing (2), and the other end of which is connected to the movable sleeve (15). When the second slot (26) is unlocked, the unlocking spring (14) pushes the movable sleeve (15) to move, and the first slot (25) can move to a position corresponding to the through hole (28).

3. The electromagnetically actuated compression release device according to claim 2, characterized in that: It also includes a ball stopper (5) and a ball stopper (5) spring located on the inner diameter side of the first cylinder (21), wherein the ball stopper (5) is located on the side of the locking nut (3) away from the locking bolt (1), one end of the ball stopper (5) spring is connected to the ball stopper (5), and the other end of the ball stopper (5) spring is connected to the first shell (2), when the locking nut (3) is locked, the ball stopper (5) is misaligned with the through hole (28), and when the locking nut (3) is unlocked, the ball stopper (5) can be moved to a position corresponding to the through hole (28) under the action of the ball stopper (5) spring.

4. The electromagnetically actuated compression release device according to claim 3, characterized in that: The electromagnet (27) is located on the inner diameter side of the movable sleeve (15), and the electromagnet (27) includes an electromagnetic coil (6) and a core iron (7). The core iron (7) is connected to a locking pin (29), and the locking pin (29) moves in and out of the second slot (26) in the radial direction.

5. The electromagnetically actuated compression release device according to claim 4, characterized in that: The end of the core iron (7) away from the locking pin (29) is connected to a pre-tightening piston (18), and the pre-tightening piston (18) is connected to a pre-tightening spring (17). The core iron (7) can push the locking pin (29) into the second groove (26) under the elastic force of the pre-tightening spring (17), and the core iron (7) can overcome the elastic force of the pre-tightening spring (17) to disengage the locking pin (29) from the second groove (26).

6. The electromagnetically actuated compression release device according to claim 5, characterized in that: A core iron liner (8) is also provided on the outer diameter side of the core iron (7), and the core iron liner (8) is made of a self-lubricating non-metallic material.

7. The electromagnetically actuated compression release device according to claim 6, characterized in that: The first groove (25) is a first annular groove opened on the movable sleeve (15), and the cross section of the first groove (25) is an arc shape. The second groove (26) is a second annular groove opened on the movable sleeve (15), and the cross section of the second groove (26) is a rectangle.

8. The electromagnetically actuated compression release device according to claim 7, characterized in that: The invention also includes a position limiting protective cover (9), wherein the position limiting protective cover (9) is mounted on the second shell (13), the locking bolt (1) is located in the position limiting protective cover (9), and an in-position indicator device (10) is provided in the position limiting protective cover (9), and the in-position indicator device (10) is used to judge the locking and unlocking states according to the position of the locking bolt (1).

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