One-way automatic locking device and aircraft drogue release locking device

Abstract

This invention discloses a one-way automatic locking device and an aircraft deceleration parachute locking device, relating to the field of mechanical locking equipment. The one-way automatic locking device is assembled between two components that exhibit relative displacement in opposite directions or back-to-back directions, and is used to lock and unlock the relative displacement of one component relative to the other. It includes a sliding lock mechanism for connecting one of the two components and a limiting mechanism for connecting the other component. The limiting mechanism includes a limiting shaft, an unlocking assembly, and a positioning cylinder fixed to the limiting shaft. The sliding lock mechanism includes a sliding lock ring and a sliding lock assembly. A release spring is provided between the sliding lock ring and the positioning cylinder. The unlocking assembly includes an unlocking fork capable of axially sliding along the limiting shaft, and the unlocking fork can release the lock between the sliding lock ring and the limiting shaft when sliding. This invention achieves a stable and secure locking state and provides a fast and convenient unlocking method.

Description

Technical Field

[0001] This invention relates to the field of mechanical locking devices, and in particular to a one-way automatic locking device and an aircraft deceleration parachute locking device. Background Technology

[0002] In some mechanical equipment, load-bearing structures are often required to ensure that two components within the equipment are relatively fixed and their positions no longer change, i.e., in a locked state. However, when the operating state of the equipment changes, it is also necessary to unlock the two components, creating a dynamic relationship of positional change.

[0003] For example, when using drag chutes for landing deceleration in aircraft (especially fighter jets), the drag chute pack faces the aforementioned operational conditions during the installation, deployment, and detachment processes. Specifically, after locking, the drag chute pack needs to quickly lock its relative position to the fuselage. After deployment, it needs to remain locked under the immense aerodynamic forces to decelerate the aircraft. After landing and deceleration are complete, or during emergency detachment, the drag chute pack needs to be unlocked promptly to detach quickly from the fuselage. Therefore, providing a stable and secure locking mechanism and a fast and convenient unlocking method is essential. Summary of the Invention

[0004] The purpose of this invention is to provide a one-way automatic locking device and an aircraft deceleration parachute locking device, including a limiting mechanism and a sliding lock mechanism. The two work together to achieve a stable and secure locking state and provide a fast and convenient unlocking method.

[0005] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0006] The present invention provides a one-way automatic locking device, which is assembled between two components that generate relative displacement in opposite directions or back directions, and is used to lock and unlock the relative displacement of one component with respect to the other component. It includes a sliding lock mechanism for connecting one of the two components and a limiting mechanism for connecting the other component. The component connected by the sliding lock mechanism is designated as the first component, and the component connected by the limiting mechanism is designated as the second component.

[0007] The limiting mechanism includes a limiting shaft, an unlocking assembly, and a positioning cylinder fixed on the limiting shaft. The positioning cylinder is used to connect the second component. The limiting shaft consists of a coaxial and continuous sliding shaft, a neck ring, and an extension shaft. The sliding shaft, neck ring, and extension shaft are all hollow shafts, and the positioning cylinder is sleeved and fixed on the extension shaft. The sliding shaft is close to the first component and has the same outer diameter as the extension shaft. The neck ring is connected between the sliding shaft and the extension shaft and has an outer diameter smaller than both of them. The neck ring has a right-angle transition surface connecting to the sliding shaft and a smooth transition surface connecting to the extension shaft. The sliding shaft and the neck ring have the same inner diameter, but the inner diameter is smaller than that of the extension shaft.

[0008] The sliding lock mechanism includes a sliding lock ring and a sliding lock assembly. The sliding lock ring can be sleeved on the limiting shaft and slidably engaged with it. The sliding lock ring has a sliding lock ring groove along its inner ring surface for assembling the sliding lock assembly. The sliding lock assembly extends out of the sliding lock ring groove when the sliding lock ring passes through the neck ring. When the sliding lock ring slides from the neck ring to the sliding shaft, the sliding lock assembly engages with the right-angle transition surface to lock the sliding lock ring. When the sliding lock ring slides from the neck ring to the extension shaft, the sliding lock assembly engages with the smooth transition surface to slide smoothly.

[0009] A release spring is provided between the sliding lock ring and the positioning cylinder. The unlocking assembly includes an unlocking fork that can slide axially along the limiting shaft. When the unlocking fork slides, it can push the sliding lock assembly back into the sliding lock ring groove, so that the sliding lock ring is unlocked from the neck ring and slides towards the sliding shaft.

[0010] Preferably, the slide lock assembly includes a slide lock spring, a push ring, and a set of arc-shaped sliders arranged in a ring array. The arc-shaped sliders have a slidably fitted inclined structure with the slide lock ring groove, and the inclined structure is used to allow the arc-shaped sliders to slide radially out of the slide lock ring groove. The slide lock spring is assembled between the slide lock ring groove and the arc-shaped sliders to provide a thrust for the arc-shaped sliders to slide out of the slide lock ring groove. The push ring is slidably assembled on the arc-shaped sliders to bear the thrust of the slide lock springs and distribute it to the arc-shaped sliders. When all the arc-shaped sliders are pushed and slide out of the slide lock ring grooves simultaneously, an approximately closed circular shape is formed, and the inner diameter of the circular ring matches the outer diameter of the neck ring.

[0011] The side of the arc-shaped slider that slides out of the sliding lock ring groove has a stop surface facing the right-angle transition surface and a sliding slope facing the smooth transition surface.

[0012] Preferably, the sliding lock ring groove is provided with a spacer rib corresponding to the gap between adjacent arc-shaped sliders.

[0013] Preferably, the unlocking fork includes a piston part, a sliding bolt, and a connecting rod connecting the two. The piston part is slidably engaged with the sliding shaft and the hollow inner hole of the neck ring part. The sliding bolts are arranged in a ring array with the connecting rod as the center, and there are gaps between adjacent sliding bolts. The front end of the sliding bolt is an arc-shaped extrusion head.

[0014] Both the neck ring and the extension shaft have a slot platform that mates with the spacer groove. Both the neck ring and the extension shaft have a clearance groove corresponding to the sliding bolt. The outer diameter of the sliding bolt and the extension shaft are similar, so that when the unlocking fork slides axially along the limiting shaft toward the sliding shaft, the sliding bolt slides along the clearance groove to the neck ring and squeezes the arc-shaped slider back into the sliding lock ring groove.

[0015] Preferably, a limit ring is threadedly fixed in the hollow inner hole of the extension shaft, and the limit ring is used to limit the distance that the unlocking fork slides toward the extension shaft.

[0016] Preferably, the hollow inner hole of the sliding shaft is fitted with a compression spring for springing the unlocking fork and causing the unlocking fork to slide toward the extension shaft.

[0017] Preferably, the unlocking assembly further includes an unlocking rod for driving the unlocking fork to slide axially toward the sliding axis. The unlocking rod is coaxially arranged with the limiting shaft, and one end of the unlocking rod points toward the unlocking fork, while the other end is fixed with a baffle. An unlocking spring is connected between the baffle and the positioning cylinder, and the baffle can be subjected to pressure toward the sliding axis generated by an electronic or mechanical structure.

[0018] The present invention also provides an aircraft deceleration parachute locking device, which includes the above-mentioned one-way automatic locking device. The first component is a deceleration parachute pack, and the second component is an aircraft fuselage load-bearing structure. The deceleration parachute pack is fixed to the sliding lock ring by parachute lines at the front end of the sliding shaft, and the positioning cylinder is fixedly connected to the aircraft fuselage load-bearing structure.

[0019] Compared with existing technologies, one or more of the above technical solutions have the following beneficial effects:

[0020] This invention allows for quick locking and is easy to operate. It utilizes a sliding lock mechanism connected to the first component and a limiting mechanism connected to the second component. Through the cooperation between the sliding lock mechanism and the limiting mechanism, when locking, it is only necessary to place the sliding lock mechanism on the limiting shaft in the limiting mechanism and slide it to a certain position (neck ring) to automatically lock.

[0021] The present invention provides a stable and secure locking state. By utilizing the cooperation between the sliding lock assembly and the limiting shaft, especially the sliding lock assembly which includes a set of annularly distributed arc-shaped sliders, the arc-shaped sliders are tightened towards the center of the ring and surround the neck ring of the limiting shaft in the locked state. Furthermore, the arc-shaped sliders are all locked to the neck ring. This allows the tensile force borne in the locked state to be evenly distributed on the arc-shaped sliders and the neck ring, avoiding the concentration of tensile force and achieving a stable and even load distribution, resulting in a more stable and secure effect.

[0022] This invention offers convenient and stable unlocking. Unlocking is achieved through a locking fork, which, when subjected to thrust, stably compresses the sliding lock assembly into the sliding lock ring groove, thus completing the unlocking process. Simultaneously, the unlocking rod experiences a relatively small thrust from the electronic or mechanical structure, allowing for control of a larger locking force on the sliding lock ring. This invention provides stable unlocking; as long as the locking fork is subjected to force, stable unlocking is guaranteed. Compared to electronic locks and electronic unlocking devices, this invention improves stability and is also very convenient to use.

[0023] Furthermore, this invention has a wide range of applications, not only in aircraft deceleration parachute locking devices, but also in other devices that require similar motion coordination, thus possessing significant commercial application value. Attached Figure Description

[0024] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0025] Figure 1 This is a schematic diagram illustrating the structural principle of a one-way automatic locking device according to the present invention.

[0026] Figure 2 This is a schematic diagram of the cooperation between the sliding lock mechanism and the limiting shaft in this invention.

[0027] Figure 3 This is a schematic diagram of the limiting shaft in this invention.

[0028] Figure 4 yes Figure 3 A schematic diagram of the HH direction of the local structure in the middle.

[0029] Figure 5 This is a schematic diagram of the slide lock assembly in this invention.

[0030] Figure 6 This is a schematic diagram of the cooperation structure between the unlocking fork and the sliding lock assembly in this invention.

[0031] Figure 7 This is a schematic diagram of the sliding locking ring in this invention.

[0032] Figure 8 This is a schematic diagram of the unlocking fork in this invention.

[0033] Figure 9 This is a schematic diagram of the sliding unlocking process of the unlocking fork in this invention.

[0034] Figure 10 This is a schematic diagram of the sliding structure of the sliding lock ring in this invention.

[0035] Figure 11 This is a schematic diagram of the locking process of the deceleration parachute locking device in this invention.

[0036] Figure 12 This is a schematic diagram of the locking state of the deceleration parachute locking device in this invention.

[0037] Figure 13 This is a schematic diagram of the parachute deployment state of the deceleration parachute locking device in this invention.

[0038] Figure 14 This is a schematic diagram of the unlocking / unlocking state of the deceleration parachute locking device in this invention.

[0039] In the picture:

[0040] 100, Limiting shaft; 200, Unlocking assembly; 300, Positioning cylinder; 400, Sliding lock ring; 500, Sliding lock assembly; 600, Unlocking spring; 700, Baffle; 800, Unlocking spring; 900, Deceleration parachute pack.

[0041] 110. Sliding shaft; 111. Compression spring; 112. Locking bolt; 120. Neck ring; 121. Right-angle transition surface; 122. Smooth transition surface; 130. Extension shaft; 131. Slot platform; 132. Relief groove; 133. Limiting ring; 134. Guide surface.

[0042] 210. Unlocking fork; 211. Piston part; 212. Sliding bolt; 213. Connecting rod; 214. Spacer groove; 215. Pressing head; 220. Unlocking rod.

[0043] 410. Slide lock ring groove; 411. Spacer rib; 412. Slide ring sliding surface; 413. Slide lock ring groove inclined surface; 414. Fixing groove; 415. Slide lock spring groove; 416. Unlocking spring groove.

[0044] 510. Slide lock spring; 520. Push ring; 530. Arc-shaped slider; 531. Stop surface; 532. Sliding inclined surface; 533. Inclined surface structure; 534. Sliding surface of slider; 535. Stop edge; 536. Slide groove.

[0045] M-thread structure. Detailed Implementation

[0046] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0047] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0048] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0049] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0050] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0051] like Figures 1-12As shown, the present invention provides a one-way automatic locking device, which is assembled between two components that generate relative displacement in opposite directions or back directions, and is used to lock and unlock the relative displacement of one component with respect to the other component. It includes a sliding lock mechanism for connecting one of the two components and a limiting mechanism for connecting the other component. The component connected by the sliding lock mechanism is designated as the first component, and the component connected by the limiting mechanism is designated as the second component.

[0052] The limiting mechanism includes a limiting shaft 100, an unlocking assembly 200, and a positioning cylinder 300 fixed on the limiting shaft 100. The positioning cylinder 300 is used to connect the second component. The limiting shaft 100 is composed of a coaxial and continuous sliding shaft 110, a neck ring portion 120, and an extension shaft 130. The sliding shaft 110, the neck ring portion 120, and the extension shaft 130 are all hollow shafts, and the positioning cylinder 300 is sleeved and fixed on the extension shaft 130. The sliding shaft 110 is close to the first component and has the same outer diameter as the extension shaft 130. The neck ring portion 120 is connected between the sliding shaft 110 and the extension shaft 130 and has an outer diameter smaller than both of them. The neck ring portion 120 has a right-angle transition surface 121 connecting the sliding shaft 110 and a smooth transition surface 122 connecting the extension shaft 130. The sliding shaft 110 and the neck ring portion 120 have the same inner diameter, which is smaller than the inner diameter of the extension shaft 130.

[0053] The sliding lock mechanism includes a sliding lock ring 400 and a sliding lock assembly 500. The sliding lock ring 400 can be sleeved on the limiting shaft 100 and slide with it. The sliding lock ring 400 has a sliding lock ring groove 410 along its inner ring surface for assembling the sliding lock assembly 500. The sliding lock assembly 500 extends out of the sliding lock ring groove 410 when the sliding lock ring 400 passes the neck ring portion 120. When the sliding lock ring 400 slides from the neck ring portion 120 to the sliding shaft 110, the sliding lock assembly 500 engages with the right-angle transition surface 121 to lock the sliding lock ring 400. When the sliding lock ring 400 slides from the neck ring portion 120 to the extension shaft 130, the sliding lock assembly 500 engages with the smooth transition surface 122 to slide smoothly.

[0054] A release spring 600 is provided between the sliding lock ring 400 and the positioning cylinder 300. The unlocking assembly 200 includes an unlocking fork 210 that can slide axially along the limiting shaft 100. When the unlocking fork 210 slides, it can push the sliding lock assembly 500 back into the sliding lock ring groove 410, so that the sliding lock ring 400 is unlocked from the neck ring 120 and slides towards the sliding shaft 110.

[0055] The unidirectional automatic locking device provided by this invention can be used as a connecting device between two components that require stable connection and timely disengagement, and also as a load device between two components whose relative positions switch between stable and changing states. One of the core structures of this invention lies in the cooperation relationship between the sliding lock mechanism and the limiting shaft 100 in the limiting mechanism. Specifically,

[0056] The sliding lock ring 400 in the sliding lock mechanism is the only structural component in this device that connects to the first component. It can be connected to the first component by means of paracord, spring, rigid connection, etc., depending on the specific application scenario and usage requirements of the technicians.

[0057] When the sliding lock ring 400 is sleeved on the limiting shaft 100, the release spring 600 is squeezed and slid to the neck ring 120 of the limiting shaft 100, the sliding lock assembly 500 automatically extends and covers the neck ring 120, so that the sliding lock ring 400 is locked in the direction away from the second component.

[0058] When unlocking is required, the unlocking fork 210 is used to push the slide lock assembly 500 back into the slide lock ring groove 410, unlocking the locked first component. Under the elastic force of the release spring 600, the slide lock ring 400 slides toward the sliding shaft.

[0059] To maintain the stability of the engagement between the sliding lock assembly 500 and the neck ring 120, and to ensure that the sliding lock assembly 500 can extend stably and promptly when the sliding lock mechanism slides to the neck ring 120, the sliding lock assembly 500 of the present invention includes a sliding lock spring 510, a push ring 520, and a set of arc-shaped sliders 530 arranged in a ring array. The arc-shaped sliders 530 have a slidable inclined surface structure 533 with the sliding lock ring groove 410, and the inclined surface structure 533 is used to allow the arc-shaped sliders 530 to slide radially out of the groove. The sliding lock ring groove 410 is described above. The sliding lock spring 510 is assembled between the sliding lock ring groove 410 and the arc-shaped slider 530 to provide a thrust that causes the arc-shaped slider 530 to slide out of the sliding lock ring groove 410. The push ring 520 is slidably assembled on the arc-shaped slider 530 to bear the thrust of the sliding lock spring 510 and distribute it to the arc-shaped slider 530. When all the arc-shaped sliders 530 are pushed and slide out of the sliding lock ring groove 410 simultaneously, they form an approximately closed circular shape, and the inner diameter of the circular shape matches the outer diameter of the neck ring 120.

[0060] The arc-shaped slider 530 has a stop surface 531 facing the right-angle transition surface 121 and a sliding inclined surface 532 facing the smooth transition surface 122 on the side where it slides out of the sliding lock ring groove 410. Furthermore, as... Figure 3 As shown, the right-angle transition surface 121 and the stop surface 531 have a chamfered design that matches each other, which helps to unlock.

[0061] like Figure 5 As shown, in some embodiments of the present invention, the arc-shaped slider 530 is provided with a groove 536 for assembling the push ring 520, and the groove 536 is provided with stop edges 535 on both sides to limit the sliding distance of the arc-shaped slider 530 relative to the push ring 520. The groove 536 enables the elastic force of the slide lock spring 510 on the push ring 520 to be stably and evenly transmitted to all the arc-shaped sliders 530.

[0062] Through the aforementioned sliding lock assembly 500, firstly, the inclined surface structure 533 and the sliding lock spring 510 enable the arc-shaped slider 530 to stably and promptly extend out of the sliding lock ring groove 410, avoiding jamming and the inability to lock; secondly, a group of arc-shaped sliders 530 (for example, a group including six) can evenly distribute the load, avoiding the problem of concentrated tension in the locked state, which could damage the device, effectively ensuring the safety, stability and durability of the locking device.

[0063] As a supplement, in order to make the movement of the arc-shaped slider 530 smoother, the sliding lock ring groove 410 is provided with a spacer rib 411 corresponding to the gap between adjacent arc-shaped sliders 530. The spacer rib 411 can separate adjacent arc-shaped sliders 530 and guide the directional movement of the arc-shaped sliders 530.

[0064] like Figure 7 As shown, the sliding ring 400 further includes a sliding ring sliding surface 412 for sliding with the limiting shaft 100, a sliding ring groove inclined surface 413 corresponding to the inclined surface structure 533 of the arc-shaped slider 530 for extending and retracting the arc-shaped slider 530, a fixing groove 414 corresponding to the first component, a sliding spring groove 415 corresponding to the sliding spring 510 in the sliding ring groove 410, and a release spring groove 416 for assembling the release spring 600 on the side near the positioning cylinder 300.

[0065] To facilitate unlocking of the sliding lock assembly 500, the unlocking fork 210 of the present invention includes a piston part 211, a sliding bolt 212 and a connecting rod 213 connecting the two. The piston part 211 slides in cooperation with the sliding shaft 110 and the hollow inner hole of the neck ring part 120. The sliding bolts 212 are arranged in a ring array with the connecting rod 213 as the center, and a gap groove 214 is left between adjacent sliding bolts 212. The front end of the sliding bolt 212 is an arc-shaped pressing head 215.

[0066] Both the neck ring portion 120 and the extension shaft 130 have a slot platform 131 that mates with the spacer groove 214. The arc-shaped slider 530 is provided with a slider sliding surface 534 corresponding to the slot platform 131. Both the neck ring portion 120 and the extension shaft 130 are provided with a relief groove 132 corresponding to the sliding bolt 212. The relief groove 132 is the gap between adjacent slot platforms 131. The outer diameter of the sliding bolt 212 is similar to that of the extension shaft 130. When the unlocking fork 210 slides axially along the limiting shaft 100 toward the sliding shaft 110, the sliding bolt 212 slides along the relief groove 132 to the neck ring portion 120 and squeezes the arc-shaped slider 530 back into the sliding lock ring groove 410.

[0067] In other words, combining Figure 3 and Figure 4 As shown, the neck ring portion 120 includes a retaining platform 131 and a clearance groove 132; the extension shaft 130 also includes a retaining platform 131 and a clearance groove 132. The retaining platform at the neck ring portion 120 and the retaining platform at the extension shaft 130 are integrated, except that the retaining platform at 120 is thinner or shorter, and the clearance grooves 132 at 120 and 130 are also connected.

[0068] In the neck ring portion 120, the bottom surface corresponding to the relief groove 132 is a guide surface 134, and the function of the guide surface 134 is to guide and limit the sliding of the sliding bolt 212.

[0069] In this invention, a limiting ring 133 is threadedly fixed in the hollow inner hole of the extension shaft 130. The limiting ring 133 is used to limit the distance that the unlocking fork 210 slides toward the extension shaft 130, so as to prevent the unlocking fork 210 from sliding excessively toward the second component and causing the unlocking fork 210 to fall off.

[0070] In this invention, the hollow inner hole of the sliding shaft 110 is fitted with a compression spring 111 for springing the unlocking fork 210 and causing the unlocking fork 210 to slide toward the extension shaft 130, thereby creating a gap in the neck ring 120 to accommodate the sliding of the arc-shaped slider 530. The sliding shaft 110 is also provided with a locking bolt 112 for locking the other end of the compression spring 111.

[0071] The present invention ingeniously unlocks the sliding lock mechanism by sliding the unlocking fork 210 in the hollow position inside the limiting shaft 100. When the piston part 211 slides in the hollow inner hole of the sliding shaft 110, the unlocking fork 210 can be automatically reset by the compression spring 111 set at the front end of the sliding shaft 110.

[0072] On the other hand, when the unlocking fork 210 slides toward the first component, the squeezing head 215 of the sliding bolt 212 will squeeze from the sliding ramp 532 of the arc-shaped slider 530 into the space between the arc-shaped slider 530 and the neck ring 120. Since the squeezing head 215 is also arc-shaped, it is easier to enter the sliding ramp 532, thereby forcing the arc-shaped slider 530 open and causing it to retract into the sliding lock ring groove 410, thus completing the unlocking process in a timely and stable manner.

[0073] In some embodiments of the present invention, the unlocking assembly 200 further includes an unlocking rod 220 for driving the unlocking fork 210 to slide axially toward the sliding shaft 110. The unlocking rod 220 is coaxially arranged with the extension shaft 130, and one end of the unlocking rod 220 points toward the unlocking fork 210, while the other end is fixed with a baffle 700. An unlocking spring 800 is connected between the baffle 700 and the positioning cylinder 300, and the baffle 700 can be subjected to pressure toward the sliding shaft generated by an electronic or mechanical structure.

[0074] It is worth noting that in this invention, multiple threaded designs can be used, such as the threaded engagement between the locking bolt 112 and the sliding shaft 110, the threaded engagement between the limiting ring 133 and the extension shaft 130, the threaded engagement between the positioning cylinder 300 and the extension shaft 130, etc. These threaded designs and the components that engage with the threads not only have the functions of connection and fixation, but also have the function of assembling and installing components together, so that the entire one-way automatic locking device can be smoothly assembled.

[0075] In addition, the structural dimensions, threaded component positions, and elastic modulus of each spring of the one-way automatic locking device can be adjusted as needed to adapt to the installation requirements of different sized spaces.

[0076] The present invention also provides a deceleration parachute locking device for an aircraft, which includes the aforementioned one-way automatic locking device. The first component is a deceleration parachute pack 900, and the second component is the aircraft fuselage load-bearing structure. The deceleration parachute pack 900 is fixed to the sliding lock ring 400 by parachute ropes at the front end of the sliding shaft 110, and the positioning cylinder 300 is fixedly connected to the aircraft fuselage load-bearing structure.

[0077] Parachute locking process: The deceleration parachute 900 is fixedly connected to the sliding lock ring 400 via the parachute ropes. The sliding lock ring 400 slides towards the positioning cylinder 300 and compresses the unlocking spring 600 to lock the deceleration parachute 900.

[0078] Parachute locked state: When the arc-shaped slider 530 of the sliding lock assembly 500 is popped out by the sliding lock spring 510, the arc-shaped slider 530 tightly wraps around the slot platform 131 of the neck ring 120 under the pressure of the sliding lock spring 510. At the same time, under the pressure of the unlocking spring 600, the stop surface 531 of the arc-shaped slider 530 is in close contact with the right-angle transition surface 121 of the neck ring 120, so that the sliding lock ring 400 cannot move towards the sliding shaft 110, and thus the deceleration parachute 900 is locked.

[0079] Parachute deployment process: When the deceleration parachute is deployed, it exerts a pulling force on the sliding lock ring 400 under the action of air. Since the sliding lock ring 400 cannot move to the left, the pulling force is transmitted to the load-bearing structure of the aircraft fuselage through the limit shaft 100 and the positioning cylinder 300, causing the aircraft to decelerate under the pulling force.

[0080] Parachute disengagement process: After the aircraft has finished landing and decelerating, or when it is necessary to disengage the drag chute in an emergency, the pressure F2 generated by the electronic control or mechanical device acts on the baffle 700, which in turn pushes the unlocking lever 220 to squeeze the unlocking fork 210. The sliding bolt 212 enters the relief groove 132 at the neck ring 120, pushing the arc-shaped slider 530 upward, thereby unlocking. Then, under the action of the F1 pulling force (the air force of the drag chute) and the release spring 600, the sliding lock ring 400 moves to the left, and the drag chute disengages.

[0081] In this invention, the sliding lock mechanism and the limiting shaft 100 can be used repeatedly, making it economical and practical. Furthermore, F1 is much larger than F2, meaning the sliding lock ring 400 can be controlled with a smaller force F2, while the sliding lock ring 400 can withstand a greater load.

[0082] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A one-way automatic locking device, assembled between two components that generate relative displacement in opposite directions, and used to lock and unlock the relative displacement of one component with respect to the other component, characterized in that, The application relates to a sliding lock mechanism for connecting two components, and a limiting mechanism for connecting the other component, wherein the component connected by the sliding lock mechanism is a first component, and the component connected by the limiting mechanism is a second component. The limiting mechanism comprises a limiting shaft, an unlocking assembly and a positioning cylinder fixed on the limiting shaft, the positioning cylinder is used for connecting the second component, the limiting shaft is composed of a coaxial and continuous sliding shaft, a neck ring part and an extension shaft, the sliding shaft, the neck ring part and the extension shaft are all hollow shafts, and the positioning cylinder is sleeved and fixed on the extension shaft; the sliding shaft is close to the first component and has the same outer diameter as the extension shaft, the neck ring part is connected between the sliding shaft and the extension shaft and has a smaller outer diameter than the two, and the neck ring part has a right-angle transition surface connected with the sliding shaft and a smooth transition surface connected with the extension shaft; the sliding shaft and the neck ring part have the same inner diameter and are smaller than the inner diameter of the extension shaft; The sliding lock mechanism comprises a sliding lock ring and a sliding lock assembly, the sliding lock ring can be sleeved on the limiting shaft and is in sliding fit with the limiting shaft; the sliding lock ring is provided with a sliding lock ring groove for assembling the sliding lock assembly on an inner ring surface of the sliding lock ring; the sliding lock assembly is extended out of the sliding lock ring groove when the sliding lock ring passes through the neck ring part, and the sliding lock assembly is locked with the right-angle transition surface when the sliding lock ring slides from the neck ring part to the sliding shaft, and the sliding lock assembly is smoothly slid with the smooth transition surface when the sliding lock ring slides from the neck ring part to the extension shaft; A lock releasing spring is arranged between the sliding lock ring and the positioning cylinder, the unlocking assembly comprises an unlocking fork capable of axially sliding along the limiting shaft, and the unlocking fork can extrude the sliding lock assembly back into the sliding lock ring groove when sliding, so that the sliding lock ring is unlocked from the neck ring part and slides to the sliding shaft.

2. The one-way automatic locking device according to claim 1, wherein The sliding lock assembly comprises a sliding lock spring, a pushing ring and a group of arc-shaped sliding blocks arranged in an annular array, the arc-shaped sliding blocks have a sliding fit inclined surface structure with the sliding lock ring groove, the inclined surface structure is used for making the arc-shaped sliding blocks slide out of the sliding lock ring groove in a radial direction, the sliding lock spring is assembled between the sliding lock ring groove and the arc-shaped sliding blocks to provide a pushing force for making the arc-shaped sliding blocks slide out of the sliding lock ring groove, and the pushing ring is slidingly assembled on the arc-shaped sliding blocks to bear the pushing force of the sliding lock spring and distribute the pushing force on the arc-shaped sliding blocks; when all the arc-shaped sliding blocks are pushed and synchronously slide out of the sliding lock ring groove, an approximately closed circular ring shape is formed, and the inner diameter of the circular ring is matched with the outer diameter of the neck ring part; One side of the arc-shaped sliding block sliding out of the sliding lock ring groove is respectively provided with a stop surface facing the right-angle transition surface and a sliding inclined surface facing the smooth transition surface.

3. The one-way automatic locking device of claim 2, wherein The sliding lock ring groove is provided with a spacing rib corresponding to the gap between adjacent arc-shaped sliding blocks.

4. The one-way automatic locking device of claim 2, wherein The unlocking fork comprises a piston part, a sliding bolt and a connecting rod connecting the two, the piston part is in sliding fit with the hollow inner hole of the sliding shaft and the neck ring part, the sliding bolt is arranged in an annular array with the connecting rod as the center, and a spacing groove is left between adjacent sliding bolts, and the front end of the sliding bolt is an extrusion head in the shape of a circular arc. The neck ring part and the extension shaft are provided with clamping groove platforms matched with the interval grooves, and the sliding bolt is provided with a clearance groove corresponding to the neck ring part and the extension shaft, and the outer diameter of the sliding bolt is similar to that of the extension shaft, so that when the unlocking fork slides along the limiting shaft towards the sliding shaft, the sliding bolt slides along the clearance groove to the neck ring part and extrudes the arc-shaped sliding block back to the slide lock ring groove.

5. The one-way automatic locking device according to claim 1 or 4, wherein The hollow inner hole of the extension shaft is provided with a limiting ring fixed by a thread, and the limiting ring is used to limit the sliding distance of the unlocking fork towards the extension shaft.

6. The one-way automatic locking device of claim 5, wherein The hollow inner hole of the sliding shaft is provided with a compression spring used to push the unlocking fork and make the unlocking fork slide towards the extension shaft.

7. The one-way automatic locking device of claim 6, wherein The unlocking assembly further comprises an unlocking lever used to drive the unlocking fork to axially slide towards the sliding shaft, the unlocking lever is coaxially arranged with the limiting shaft, one end of the unlocking lever points to the unlocking fork, and the other end is fixed with a baffle; the baffle is connected with the positioning cylinder through an unlocking spring, and the baffle can be subjected to the pressure generated by an electric control or a mechanical structure towards the sliding shaft.

8. An aircraft drogue deployment lock apparatus, comprising: The one-way automatic locking device comprises the first part and the second part, and the first part is a parachute pack, and the second part is a fuselage load-bearing structure of an aircraft, wherein the parachute pack is fixed on the slide lock ring by a parachute rope at the front end of the sliding shaft, and the positioning cylinder is fixedly connected with the fuselage load-bearing structure of the aircraft.

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