Pneumatic unlocking device

Abstract

The application discloses a kind of pneumatic unlocking device, it includes valve body, mobile valve core, first reset piece and the locking structure for clamping unlocking bolt.Valve body is equipped with first cavity and the connecting hole for inflation.Mobile valve core is slidably connected with valve body, and the first end of mobile valve core extends into first cavity along first through hole.First reset piece makes mobile valve core move towards the tendency in first cavity.Locking structure is located outside valve body, and the end of locking structure away from mobile valve core is equipped with the locking slot for clamping unlocking bolt, and mobile valve core moves to change the opening of locking slot.The pneumatic unlocking device disclosed in the application changes the opening of locking slot of locking structure by pneumatically controlling the movement of mobile valve core, to realize the clamping and separation of unlocking bolt.During the whole unlocking process, the irreversible damage or deformation of each component of the device will not occur due to unlocking action, and new unlocking device is not needed after each unlocking.

Description

Technical Field

[0001] This application belongs to the technical field of unlocking mechanisms, specifically relating to a pneumatic unlocking device. Background Technology

[0002] During the flight and recovery of launch vehicles, there are frequent situations requiring unlocking, such as unlocking between modules, unlocking the adapter from the satellite, and unlocking the recovery legs of liquid-fueled reusable rockets. Unlocking devices are required for these operations.

[0003] Unlocking devices typically use traditional connection unlocking methods that rely on explosive bolts. However, explosive bolts cannot be reused, resulting in high costs. Summary of the Invention

[0004] To solve the above-mentioned technical problems, this application discloses a pneumatic unlocking device.

[0005] The technical solution adopted to achieve the purpose of this application is as follows: In the first aspect of this application, the present invention discloses a pneumatic unlocking device, comprising: The valve body is provided with a first cavity, a connecting hole and a first through hole, the first through hole and the connecting hole are both connected to the first cavity, and the connecting hole is used to connect to a pressurizing structure; A movable valve core is slidably connected to the valve body. The first end of the movable valve core extends into the first cavity along the first through hole and divides the first cavity into a first cavity and a second cavity along the axial direction of the movable valve core. The first through hole and the connecting hole are both connected to the first cavity. A first reset member, the two ends of which act on the valve body and the movable valve core respectively, the first reset member causing the movable valve core to move towards the first cavity; and A locking structure is located outside the valve body. The locking structure has a locking groove at one end opposite to the movable valve core. The movable valve core moves to change the opening degree of the locking groove.

[0006] According to one embodiment of the present invention, the locking structure includes two grippers, both grippers being rotatably connected to the valve body, the first ends of the two grippers being located on both sides of the movable valve core, and the second ends of the two grippers forming the locking groove; the movable valve core moves to change the distance between the second ends of the two grippers.

[0007] According to one embodiment of the present invention, the locking structure further includes two second reset members, which are arranged in a one-to-one correspondence with the two grippers. The two ends of the second reset members act on the valve body and the grippers respectively, and the second reset members cause the first ends of the two grippers to tend to move closer to each other.

[0008] According to one embodiment of the present invention, the first end of the gripper is provided with a roller for cooperating with the movable valve core.

[0009] According to one embodiment of the present invention, the second end of the movable valve core is provided with a wedge block, the wedge block being located between the first ends of the two grippers, the wedge block being moved to change the distance between the first ends of the two grippers.

[0010] According to one embodiment of the present invention, a groove is provided on the second end of the gripper, the groove being located on the side of the gripper facing the other gripper, and the two grooves forming the locking groove.

[0011] According to one embodiment of the present invention, the valve body further includes a second cavity and a second through hole, the second cavity being connected to the first cavity through the first through hole, the second through hole being located on the side of the second cavity opposite to the first through hole, the locking structure being located in the second cavity, and the locking groove being located at the second through hole.

[0012] According to one embodiment of the present invention, the valve body includes a cover and a housing, the connecting hole, the first through hole, the second cavity and the second through hole are all disposed in the housing, and the cover is connected to the housing to form the first cavity.

[0013] According to one embodiment of the present invention, the cover is provided with a guide hole, the guide hole being coaxially arranged with the movable valve core; the movable valve core is slidably connected to the guide hole, the movable valve core is provided with a protrusion, the protrusion being annular along the circumference of the movable valve core, the protrusion abutting against the inner wall of the housing to divide the first cavity into the first cavity and the second cavity.

[0014] According to one embodiment of the present invention, a first mounting groove is provided on the protrusion, and a second mounting groove is provided on the cover at a position corresponding to the first mounting groove, and the two ends of the first reset member are respectively located in the first mounting groove and the second mounting groove.

[0015] As can be seen from the above technical solution, the pneumatic unlocking device disclosed in this application includes a valve body, a movable valve core, a first reset member, and a locking structure for clamping the unlocking bolt. The valve body has a first cavity, a connecting hole, and a first through hole. Both the first through hole and the connecting hole communicate with the first cavity, and the connecting hole is used to communicate with a pressurizing structure. The movable valve core is slidably connected to the valve body. The first end of the movable valve core extends into the first cavity along the first through hole and divides the first cavity into a first cavity and a second cavity along the axial direction of the movable valve core. Both the first through hole and the connecting hole communicate with the first cavity. The two ends of the first reset member act on the valve body and the movable valve core respectively, causing the movable valve core to tend to move towards the first cavity. The locking structure is located outside the valve body. The end of the locking structure opposite to the movable valve core has a locking groove for clamping the unlocking bolt. The movable valve core moves to change the opening of the locking groove.

[0016] The pneumatic unlocking device disclosed in this application changes the opening of the locking groove of the locking structure by pneumatically controlling the movement of the movable valve core, thereby achieving the clamping and disengagement of the unlocking bolt. Throughout the unlocking process, no irreversible damage or deformation occurs to any component of the device due to the unlocking action. Compared with traditional disposable unlocking devices such as explosive bolts, this significantly reduces operating costs. In multiple flights and recovery missions of launch vehicles, it is unnecessary to replace the unlocking device after each unlocking; only necessary inspection and maintenance are required for reuse, thus improving resource utilization. Attached Figure Description

[0017] To enable those skilled in the art to more clearly understand this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0018] Figure 1 This is a schematic diagram of a pneumatic unlocking device in one or more embodiments of this application; Figure 2 for Figure 1 Schematic diagram of the middle valve body; Figure 3 for Figure 1 A schematic diagram of the locking structure; Figure 4 for Figure 1 A schematic diagram of the moving valve core.

[0019] Explanation of reference numerals in the attached drawings: 100, valve body; 110, first cavity; 120, first through hole; 130, connecting hole; 140, air storage cavity; 150, second cavity; 160, second through hole; 170, housing; 180, cover; 181, second mounting groove; 200, movable valve core; 210, protrusion; 211, first mounting groove; 300, first reset element; 400, locking structure; 410, locking groove; 420, gripper; 421, groove; 430, roller; 500, unlocking bolt; 600, wedge block; 700, sealing ring. Detailed Implementation

[0020] To enable those skilled in the art to more clearly understand this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0021] Furthermore, reference numerals and / or reference letters may be repeated in different examples in this application. Such repetition is for simplification and clarity purposes and does not in itself indicate a relationship between the various embodiments and / or settings discussed. In addition, this application provides examples of various specific processes and materials; however, those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0023] This invention discloses a pneumatic unlocking device that can solve the technical problems of existing unlocking devices, such as the inability to reuse explosive bolts and high costs.

[0024] The technical solutions of this application will be described in detail below through specific embodiments and in conjunction with the accompanying drawings, which are not necessarily drawn to scale. Similar or identical reference numerals may be used to designate the same or similar parts in different figures. The use of similar or identical reference numerals in different figures does not mean that all figures including similar or identical reference numerals constitute a single or the same embodiment. The accompanying drawings illustrate the various embodiments discussed in this application in a generalized manner, by way of example and not limitation.

[0025] See Figure 1 , Figure 2 , Figure 3 and Figure 4In a first aspect embodiment of this application, a pneumatic unlocking device is disclosed, comprising a valve body 100, a movable valve core 200, a first reset member 300, and a locking structure 400 for clamping an unlocking bolt 500. The valve body 100 has a first cavity 110, a connecting hole 130, and a first through hole 120. Both the first through hole 120 and the connecting hole 130 communicate with the first cavity 110, and the connecting hole 130 communicates with a pressurizing structure. The movable valve core 200 is slidably connected to the valve body 100. The first end of the movable valve core 200 extends into the first cavity 110 along the first through hole 120 and divides the first cavity 110 into a first cavity and a second cavity along the axial direction of the movable valve core 200. Both the first through hole 120 and the connecting hole 130 communicate with the first cavity. The two ends of the first reset member 300 act on the valve body 100 and the movable valve core 200 respectively, causing the movable valve core 200 to move towards the first cavity 110. The locking structure 400 is located outside the valve body 100. The end of the locking structure 400 opposite to the movable valve core 200 is provided with a locking groove 410 for clamping the unlocking bolt 500. The movable valve core 200 moves to change the opening of the locking groove 410.

[0026] When the movable valve core 200 moves toward the locking structure 400, the locking groove 410 closes, and the pneumatic unlocking device clamps the unlocking bolt 500; when the movable valve core 200 moves toward the first cavity 110, the locking groove 410 opens, and the unlocking bolt 500 can be separated from the pneumatic unlocking device.

[0027] The pneumatic unlocking device disclosed in this embodiment changes the opening degree of the locking groove 410 of the locking structure 400 by pneumatically controlling the movement of the movable valve core 200, thereby achieving the clamping and disengagement of the unlocking bolt 500. Throughout the unlocking process, no irreversible damage or deformation occurs to any component of the device due to the unlocking action. Compared with traditional disposable unlocking devices such as explosive bolts, this significantly reduces usage costs. In multiple flights and recovery missions of launch vehicles, it is not necessary to replace the unlocking device after each unlocking; only necessary inspection and maintenance are required for reuse, thus improving resource utilization.

[0028] In one embodiment, the locking structure 400 includes two grippers 420, both of which are rotatably connected to the valve body 100. The first ends of the two grippers 420 are located on opposite sides of the movable valve core 200, and the second ends of the two grippers 420 form locking grooves 410. The movable valve core 200 moves to change the distance between the second ends of the two grippers 420.

[0029] By moving the valve core 200, the distance between the first ends of the two grippers 420 is changed. Utilizing the lever principle, the spacing of the second ends of the grippers 420 (the part forming the locking groove 410) is correspondingly changed, achieving precise clamping and loosening of the unlocking bolt 500. When the valve core 200 moves towards the first cavity 110, the first ends of the two grippers 420 move closer together, causing the second ends of the two grippers 420 to move further apart, thereby causing the locking groove 410 to release its grip on the unlocking bolt 500, completing the unlocking action; when the valve core 200 moves towards the grippers 420, the first ends of the two grippers 420 move further apart, causing the second ends of the two grippers 420 to move closer together, thereby causing the locking groove 410 to clamp the unlocking bolt 500.

[0030] This design can precisely control the force on the unlocking bolt 500. When tightening is required, it ensures that the claw 420 applies a uniform and sufficient clamping force to the unlocking bolt 500 to prevent the unlocking bolt 500 from loosening unexpectedly. When unlocking, it can quickly and reliably loosen the unlocking bolt 500 to ensure the timeliness and accuracy of the unlocking action.

[0031] In applications such as launch vehicles where time is extremely critical, this rapid-response unlocking capability is crucial. It ensures that the unlocking action is completed quickly at the predetermined time, allowing relevant components to separate or deploy as planned, thus guaranteeing the smooth execution of the entire mission.

[0032] In one embodiment, the locking structure 400 further includes two second reset members, each corresponding to one of the two grippers 420. The two ends of each second reset member act on the valve body 100 and the grippers 420 respectively, causing the first ends of the two grippers 420 to tend to move closer together. When the movable valve core 200 moves towards the first cavity 110, the two second reset members push the first ends of the grippers 420 closer together, causing the second ends of the two grippers 420 to move further apart, thereby increasing the opening of the locking groove 410 and releasing the lock on the unlocking bolt 500.

[0033] The second reset component provides additional assistance to the unlocking action, ensuring that the second ends of the claws 420 can quickly and reliably move away from each other, increasing the opening of the lock groove 410 and smoothly releasing the lock on the unlocking bolt 500.

[0034] In one embodiment, the first end of the gripper 420 is provided with a roller 430 for engaging with the movable valve core 200.

[0035] During sliding friction, there is a large relative motion resistance between the contact surfaces, while the resistance of rolling friction is much smaller than that of sliding friction. When the movable valve core 200 moves and contacts the roller 430 at the first end of the gripper 420, the rolling of the roller 430 makes the relative movement between the movable valve core 200 and the gripper 420 easier.

[0036] This ensures the continuity and stability of the movement of the movable valve core 200, avoids inaccurate unlocking or locking actions caused by jamming, and improves the reliability and stability of the device.

[0037] The lower resistance to movement allows the movable valve core 200 to respond to control signals more quickly and complete the movement rapidly. During unlocking or locking, the movable valve core 200 can quickly reach the designated position, causing the gripper 420 to perform the corresponding action.

[0038] In one embodiment, the second end of the movable valve core 200 is provided with a wedge block 600, which is located between the first ends of the two grippers 420. The wedge block 600 moves to change the distance between the first ends of the two grippers 420.

[0039] The wedge block 600 has a specific bevel angle. When the movable valve core 200 moves toward the locking structure 400, the bevel of the wedge block 600 contacts the gripper 420. This bevel design converts the axial movement of the movable valve core 200 into a lateral thrust on the gripper 420, and the guiding effect of the bevel allows the movable valve core 200 to be inserted more naturally and smoothly between the two grippers 420. Compared to a design without the wedge block 600, this greatly reduces jamming and obstruction during insertion. Operators or control systems do not need to apply excessive force to push the movable valve core 200, improving the convenience and smoothness of operation.

[0040] In one embodiment, a groove 421 is provided on the second end of the gripper 420. The groove 421 is located on the side of the gripper 420 facing the other gripper 420, and the two grooves 421 form a locking groove 410.

[0041] The grooves 421 on the two claws 420 together form the locking groove 410. When the claws 420 are closed, the unlocking bolt 500 is tightly accommodated in the locking groove 410. The shape of the groove 421 can be precisely designed according to the shape of the unlocking bolt 500 so that it fits tightly with the surface of the unlocking bolt 500, increasing the contact area.

[0042] This tight fit generates significant friction, effectively preventing the unlocking bolt 500 from loosening or falling off when subjected to vibration, impact, or external pulling. This greatly improves the stability and reliability of the lock, ensuring a secure connection during critical tasks.

[0043] The groove 421 design on the gripper 420 makes the structure of the locking slot 410 relatively simple and regular, facilitating integration and assembly with other components. In the design of spacecraft such as launch vehicles and satellites, the unlocking device needs to work closely with components such as modules and adapters.

[0044] The groove 421 has a relatively simple structure and can be manufactured using common machining processes such as milling and turning. Compared to more complex structures, the manufacturing process of the groove 421 is more mature and stable, making it easier to ensure machining accuracy and quality.

[0045] In one embodiment, the valve body 100 further includes a second cavity 150 and a second through hole 160. The second cavity 150 communicates with the first cavity 110 through a first through hole 120, and the second through hole 160 is located on the side of the second cavity 150 opposite to the first through hole 120. A locking structure 400 is located within the second cavity 150, and a locking groove 410 is located at the second through hole 160. An unlocking bolt 500 extends into the second cavity 150 from the second through hole 160, and the locking structure 400 clamps the portion of the unlocking bolt 500 that extends into the second cavity 150.

[0046] By providing a second cavity 150 on the valve body 100 and housing the locking structure 400 therein, while utilizing the second through hole 160 to allow the unlocking bolt 500 to be inserted, this design concentrates the key components related to unlocking in a relatively independent and compact space. The first cavity 110 and the second cavity 150 are connected through the first through hole 120, making reasonable use of the internal space of the valve body 100 and avoiding the dispersed arrangement of various components.

[0047] In one embodiment, the valve body 100 includes a cover 180 and a housing 170. A connection hole 130, a first through hole 120, a second cavity 150, and a second through hole 160 are all disposed in the housing 170, and the cover 180 covers the housing 170 to form a first cavity 110.

[0048] The valve body 100 is manufactured by disassembling it into two relatively independent components: a cover 180 and a housing 170. The housing 170 has key structures such as a connecting hole 130, a first through hole 120, a second cavity 150, and a second through hole 160. These structures can be manufactured separately using mature processes such as mold forming and machining. The cover 180 has a relatively simple structure and is less difficult to manufacture. Compared to manufacturing a single, complex valve body 100, separate manufacturing reduces processing complexity, improves processing accuracy and production efficiency, and also helps control manufacturing costs. For example, for housings 170 with complex internal cavities and channels, mold forming ensures the accuracy of the dimensions of each part.

[0049] During assembly, the locking structure 400, unlocking bolt 500, and other related components can be installed first in the second cavity 150 of the housing 170, and then the cover 180 can be attached to the housing 170 to form the first cavity 110. This step-by-step assembly method allows for relatively large operating space at each step, making the operation more convenient.

[0050] In one embodiment, the cover 180 is provided with a guide hole, which is coaxially arranged with the movable valve core 200. The movable valve core 200 is slidably connected to the guide hole, and the movable valve core 200 is provided with a protrusion 210, which is annular along the circumference of the movable valve core 200. The protrusion 210 abuts against the inner wall of the housing 170 to divide the first cavity 110 into a first cavity and a second cavity.

[0051] The guide hole and the movable valve core 200 are coaxially arranged and slidably connected, providing a precise trajectory for the movement of the movable valve core 200. Driven pneumatically or by other power, the movable valve core 200 can only move linearly along the axis of the guide hole, without deviation or wobbling. This ensures the accuracy and stability of the movement of the movable valve core 200, enabling it to accurately reach the predetermined position and achieve precise control of the locking structure 400 or the unlocking bolt 500. For example, in a pneumatic unlocking device, precise movement ensures the timeliness and reliability of the unlocking action.

[0052] The protrusion 210 on the movable valve core 200 is circumferentially annular and abuts against the inner wall of the housing 170, dividing the first chamber 110 into a first chamber and a second chamber. This separation allows gases or liquids with different functions to flow and act independently in their respective chambers, avoiding mutual interference. This improves the efficiency and control precision of pneumatic or hydraulic systems. For example, different pressures can be set in different chambers to achieve different driving effects on the movable valve core 200, thereby controlling the unlocking process more precisely.

[0053] Since the first and second chambers are separated, the movement of the movable valve core 200 can be independently adjusted by controlling parameters such as the flow rate and pressure of the gas or liquid entering the two chambers respectively. For example, the moving speed of the movable valve core 200 can be controlled by adjusting the gas pressure entering the first chamber.

[0054] The protrusion 210 abuts against the side wall of the housing 170. When the movable valve core 200 moves to a certain position within the guide hole, the protrusion 210 contacts the end of the housing 170 or other limiting structures, thereby preventing the movable valve core 200 from continuing to move and avoiding it from completely leaving the first cavity 110 from the first through hole 120. This prevents system failure or damage to other components due to the movable valve core 200 dislodging. For example, if the movable valve core 200 dislodles, the locking structure 400 may lose control, making it impossible to properly lock or unlock the unlocking bolt 500, affecting the operation of the entire device.

[0055] The protrusion 210 abuts against the inner wall of the housing 170, providing a certain degree of sealing to prevent gas or liquid leakage between the first and second chambers. For higher sealing requirements, sealing elements such as a sealing ring 700 can be installed between the protrusion 210 and the inner wall of the housing 170. This ensures the independence and sealing of the two chambers, guaranteeing the normal operation of the pneumatic or hydraulic system. For example, in systems requiring precise pressure control, good sealing performance can prevent pressure leakage and improve the system's control accuracy.

[0056] The sealing ring 700 is typically made of an elastic material, such as rubber or silicone. When the protrusion 210 is tightly fitted against the inner wall of the housing 170, the sealing ring 700 is compressed and undergoes elastic deformation, filling the tiny gap between them and forming a reliable sealing barrier. Media such as gases, liquids, or dust are unlikely to leak through this barrier.

[0057] In one embodiment, a gas storage cavity 140 is provided on the housing 170, and the gas storage cavity 140 is located at the connection between the first cavity and the first through hole 120. The diameter of the gas storage cavity 140 is larger than the diameter of the first through hole 120, and the diameter of the gas storage cavity 140 is smaller than the diameter of the protrusion 210. The connecting hole 130 communicates with the gas storage cavity 140, and the connecting hole 130 is perpendicular to the axis of the first through hole 120.

[0058] When high-pressure gas enters through the first through-hole 120, the gas storage chamber 140 provides a buffer and diffusion space for the gas. After entering the relatively spacious gas storage chamber 140, the gas velocity will be appropriately reduced, and the pressure distribution will be more uniform, avoiding excessive local pressure and airflow turbulence caused by the gas directly impacting the interior of the first chamber 110.

[0059] The gas storage chamber 140 provides a temporary space for storing and accumulating pressure for high-pressure gas. When high-pressure gas enters the gas storage chamber 140, due to its relatively large volume, the gas can quickly fill the chamber in a short time, causing the pressure inside to rise rapidly. This rapidly accumulated pressure can be promptly transmitted to the moving valve core 200, providing strong power for its movement.

[0060] Compared to a structure without the gas storage chamber 140, the design of the gas storage chamber 140 reduces pressure loss during gas flow. When gas flows in the first through-hole 120, a certain amount of frictional resistance and pressure drop occurs due to the narrow channel. The presence of the gas storage chamber 140 allows for a buffering and adjustment process before the gas enters the first chamber 110, reducing pressure loss in the channel and ensuring sufficient pressure to drive the valve core.

[0061] In one embodiment, a first mounting groove 211 is provided on the protrusion 210, and a second mounting groove 181 is provided on the cover 180 at a position corresponding to the first mounting groove 211. The two ends of the first reset member 300 are respectively located in the first mounting groove 211 and the second mounting groove 181.

[0062] The first mounting groove 211 is provided on the protrusion 210, and the second mounting groove 181 is provided on the cover 180 at a position corresponding to the first mounting groove 211. This corresponding design provides a precise installation position for the first reset member 300. During assembly, simply placing both ends of the first reset member 300 into the first mounting groove 211 and the second mounting groove 181 respectively ensures that the first reset member 300 is accurately installed. During operation, the first reset member 300 is subjected to the force generated by the movement of the moving valve core 200 and its own elasticity. The first mounting groove 211 and the second mounting groove 181 can restrict the movement of the first reset member 300 in the horizontal and vertical directions, keeping it always in the correct position.

[0063] Since the first mounting slot 211 and the second mounting slot 181 position the first reset component 300, assembly personnel do not need to spend extra time and effort adjusting the position of the first reset component 300. Installation can be completed simply by placing the first reset component 300 into the mounting slot in the prescribed order. This reduces the difficulty and complexity of assembly, improves production efficiency, and is especially suitable for large-scale automated production. At the same time, it also reduces the failure rate caused by improper assembly, lowering after-sales maintenance costs.

[0064] In one embodiment, at least one of the outer sidewall of the protrusion 210 and the inner sidewall of the housing 170 is provided with a groove for mounting the sealing ring 700.

[0065] The slot provides a clearly defined installation position for the sealing ring 700. During assembly, the sealing ring 700 can be accurately embedded into the slot, avoiding sealing problems caused by installation position deviations. The size and shape of the slot can be precisely designed according to the specifications of the sealing ring 700 to ensure a tight fit between the sealing ring 700 and the slot.

[0066] When the sealing ring 700 is embedded in the groove, the sidewall of the groove exerts a certain squeezing force on the sealing ring 700, causing the sealing ring 700 to undergo elastic deformation. This better fills the gap between the sealing surfaces and enhances the sealing effect. At the same time, the structure of the groove can also guide the deformation direction of the sealing ring 700, making it more effective in preventing media leakage.

[0067] In one embodiment, the cover 180 and the housing 170 are connected by bolts or screws. The bolts or screws are screwed into the threaded holes of the cover 180 and the housing 170, and the mechanical interlocking of the threads tightly connects the cover 180 and the housing 170 together. When subjected to external forces, the friction of the threads and the mechanical structure can withstand significant tensile and shear forces, ensuring that the cover 180 will not easily separate from the housing 170.

[0068] The pneumatic unlocking device disclosed in this application works as follows: When the movable valve core 200 moves toward the locking structure 400, the locking groove 410 closes, at which point the unlocking device is activated to clamp the unlocking bolt 500. Specifically, the movable valve core 200 moves toward the gripper 420, and the wedge block 600 pushes the first ends of the two grippers 420 away from each other. According to the lever principle, the second ends of the two grippers 420 move closer together, thereby closing the locking groove 410 and clamping the unlocking bolt 500.

[0069] When unlocking is required, pressure is applied to the first cavity 110 through the connecting hole 130. Under pressure, the moving valve core 200 overcomes the elastic force of the first reset member 300 and moves into the first cavity 110. At this time, the wedge block 600 retracts, and the two grippers 420, under the action of the second reset member, move their first ends closer together and their second ends further apart, opening the locking groove 410 and separating the unlocking bolt 500 from the unlocking device. After unlocking, the mechanism remains intact and can be reused. Through the above embodiments, this application has the following beneficial effects or advantages: The pneumatic unlocking device disclosed in this application uses pneumatic principles and mechanical structures to achieve the unlocking function. During the unlocking process, none of the device's components are damaged, and the mechanism remains intact and reusable after unlocking, greatly reducing usage costs. The device has a simple overall structure, reasonable component layout, and no complex precision structural parts, making product processing difficult and facilitating large-scale manufacturing, further reducing costs. The first reset component 300 uses a high-thrust spring. When the unlocking mechanism is in the locked state, the spring's thrust ensures that the mechanism will not mislock even under strong vibration, ensuring reliable locking and improving the safety of the launch vehicle during flight and recovery. The large tensile force borne by the unlocking bolt 500 is transmitted and dispersed through the gripper 420, roller 430, and other components, greatly reducing the unlocking thrust required for the moving valve core 200, lowering the requirements for the pressurization structure, and making the unlocking operation easier to achieve. The wedge block 600 has a short travel distance, allowing it to move rapidly under pressure. This quickly changes the position of the gripper 420, enabling the locking groove 410 to open quickly and accelerating the unlocking process, thus meeting the requirements for rapid unlocking of the launch vehicle. The motion components of this device have a simple and reliable structure, do not require high motion precision during unlocking, have strong tolerance, and are not prone to motion failures, thereby improving the stability and durability of the device.

[0070] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention have been clearly and completely described above with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0071] Therefore, the above detailed description of the embodiments of the invention disclosed in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0072] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0073] In the description of this invention, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0074] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0075] In this invention, unless otherwise expressly specified and limited, "above or below" a first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0076] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0077] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A pneumatic unlocking device, characterized in that, include: The valve body is provided with a first cavity, a connecting hole and a first through hole, the first through hole and the connecting hole are both connected to the first cavity, and the connecting hole is used to connect to a pressurizing structure; A movable valve core is slidably connected to the valve body. The first end of the movable valve core extends into the first cavity along the first through hole and divides the first cavity into a first cavity and a second cavity along the axial direction of the movable valve core. The first through hole and the connecting hole are both connected to the first cavity. The first reset member has two ends that act on the valve body and the movable valve core respectively, and the first reset member causes the movable valve core to move toward the first cavity. as well as A locking structure is located outside the valve body. The locking structure has a locking groove at one end opposite to the movable valve core. The movable valve core moves to change the opening degree of the locking groove.

2. The pneumatic unlocking device according to claim 1, characterized in that, The locking structure includes two grippers, both of which are rotatably connected to the valve body. The first ends of the two grippers are located on both sides of the movable valve core, and the second ends of the two grippers form the locking groove. The movable valve core moves to change the distance between the second ends of the two grippers.

3. The pneumatic unlocking device according to claim 2, characterized in that, The locking structure also includes two second reset members, which are arranged one-to-one with the two grippers. The two ends of the second reset members act on the valve body and the grippers respectively, and the second reset members cause the first ends of the two grippers to tend to move closer to each other.

4. The pneumatic unlocking device according to claim 2, characterized in that, The first end of the gripper is provided with a roller for cooperating with the movable valve core.

5. The pneumatic unlocking device according to claim 2, characterized in that, The second end of the movable valve core is provided with a wedge block, which is located between the first ends of the two grippers. The wedge block moves to change the distance between the first ends of the two grippers.

6. The pneumatic unlocking device according to claim 2, characterized in that, A groove is provided on the second end of the gripper, the groove is located on the side of the gripper facing the other gripper, and the two grooves form the locking groove.

7. The pneumatic unlocking device according to any one of claims 1 to 6, characterized in that, The valve body further includes a second cavity and a second through hole. The second cavity is connected to the first cavity through the first through hole. The second through hole is located on the side of the second cavity opposite to the first through hole. The locking structure is located in the second cavity, and the locking groove is located at the second through hole.

8. The pneumatic unlocking device according to claim 7, characterized in that, The valve body includes a cover and a housing. The connecting hole, the first through hole, the second cavity, and the second through hole are all disposed in the housing. The cover is connected to the housing to form the first cavity.

9. The pneumatic unlocking device according to claim 8, characterized in that, The cover is provided with a guide hole, which is coaxially arranged with the movable valve core. The movable valve core is slidably connected to the guide hole. The movable valve core is provided with a protrusion that is annular along the circumference of the movable valve core. The protrusion abuts against the inner wall of the housing to divide the first cavity into the first cavity and the second cavity.

10. The pneumatic unlocking device according to claim 9, characterized in that, The protrusion is provided with a first mounting groove, and the cover is provided with a second mounting groove at a position corresponding to the first mounting groove. The two ends of the first reset member are respectively located in the first mounting groove and the second mounting groove.

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