Air vane and gas vane linkage unlocking mechanism based on steel ball lock

Abstract

The air rudder and gas rudder linkage unlocking mechanism based on the steel ball lock is designed to be of a two-stage structure, a driving stage and an output stage share one shell, an output piston is installed in an output piston cavity in the left side of the shell, a driving piston is installed in a driving piston cavity in the right side of the shell, and the output piston and the driving piston achieve interlocking in different states through steel balls. And a large locking force is provided. Meanwhile, springs are installed at one end of the output piston and one end of the driving piston respectively and used for keeping the linkage or unlocking state of the mechanism. In addition, after the output piston is unlocked in place, the two reeds are conducted, and unlocking in-place state information is transmitted to a system for mechanism state feedback. On the basis of the steel ball lock principle, a double-piston linkage unlocking mechanism is designed, double-redundancy design is adopted, short-time electrification is needed only during state switching, linkage and unlocking states are power-off, the working reliability of the linkage and unlocking states under long-time and complex working conditions can be guaranteed, and repeated testing can be achieved.

Description

Technical Field

[0001] The invention relates to the field of aircraft design, in particular to a linkage unlocking mechanism of an air rudder and a gas rudder based on a steel ball lock. Background Art

[0002] When the aircraft is initially launched, the speed is low and the air rudder is inefficient. The initial rapid turn is mainly achieved by changing the direction of the engine jet using the gas rudder. From the perspective of reducing costs and size, the gas rudder is generally not designed with a separate drive mechanism, but is connected to the drive mechanism of the air rudder through a linkage mechanism, and the gas rudder is driven to deflect through the drive mechanism of the air rudder. This requires that the air rudder and the gas rudder are linked for a period of time after the aircraft is launched to control the rapid turn of the aircraft; after the aircraft has turned in place, the linkage mechanism is unlocked, the air rudder and the gas rudder move independently of each other, the gas rudder remains in a zero position under the action of the gas flow, and the air rudder deflects following the rudder command signal.

[0003] The traditional air rudder and gas rudder linkage unlocking mechanism is generally a pyrotechnic mechanism such as a pin puller, which is a disposable product and cannot be tested during the installation process. It is also relatively expensive. Another technical solution is an electromagnetic pin puller, which can be tested repeatedly, requires continuous power supply for a long time in the linkage / unlocking state, has a small locking force, and has low working reliability under complex working conditions. Summary of the invention

[0004] The technical problem solved by the present invention is to solve the reliability and testability of the linkage unlocking mechanism of an air rudder and a gas rudder, and provide a linkage unlocking mechanism of an air rudder and a gas rudder based on a steel ball lock. The present invention is a reusable non-pyrotechnic linkage unlocking mechanism, which only needs to be powered on for a short time and can maintain a highly reliable linkage state and unlocking state in a power-off state. The locking force is large enough and repeated testing can be achieved.

[0005] The technical solution of the present invention is to provide an air rudder and gas rudder linkage unlocking mechanism based on a steel ball lock, which is designed as a two-stage structure, wherein a driving stage and an output stage are jointly arranged in a shell, and an output stage piston chamber and a driving stage piston chamber are arranged in parallel on the left and right sides in the shell, and a steel ball movement chamber is opened on the wall between the two piston chambers to accommodate the steel ball;

[0006] An output piston is arranged in the output stage piston cavity, a through hole is opened on the shell wall at one end of the cavity for the output piston to enter and exit, and a first elastic body is arranged between the output piston and the hole end to generate elastic force along the axial direction of the cavity;

[0007] Electromagnetic coils are installed at both ends of the driving stage piston cavity, and a driving piston is arranged between the two electromagnetic coils. Permanent magnets with opposite magnetic field directions are installed at both ends of the driving piston, and they form redundant driving structures with the two electromagnetic coils, one end is attracted and the other end is repelled. A second elastic body is also installed in the driving stage piston cavity, and the installation direction of the second elastic body relative to the driving piston is the same as the direction of the first elastic body relative to the output piston.

[0008] Under the coordinated action of the electromagnetic force at both ends and the elastic force of the second elastic body, the driving piston moves along the driving stage piston cavity, causing the steel ball to move horizontally in the steel ball movement cavity, controlling the output piston to be locked or unlocked. The output piston moves driven by the elastic force of the first elastic body, and reaches the unlocked state through the unlocking process from the linkage state, thereby realizing the linkage and unlocking state switching of the air rudder and the gas rudder.

[0009] Furthermore, the linkage unlocking mechanism only needs to be powered on during the unlocking process, and both the linkage state and the unlocking state are powered off;

[0010] When the linkage unlocking mechanism is in the linkage state, the driving piston is in the initial position and remains stationary under the action of the second elastic body, and the output piston is locked by the cooperation of the steel ball and the driving piston, so that the output piston remains extended out of the output stage piston cavity, and the air rudder and the gas rudder are controlled to be linked;

[0011] During the unlocking process of the linkage unlocking mechanism, the electromagnetic coils at both ends are energized, and the driving piston overcomes the force of the second elastic body under the action of the electromagnetic field to move. After the movement is in place, the steel ball limit is released, and the output piston pushes the steel ball to move horizontally under the action of the first elastic body, the output piston is unlocked, and the driving piston is locked at the same time, and the output piston moves from outside to inside until it completely enters the output stage piston cavity; the electromagnetic coils at both ends are de-energized, and the driving piston pushes the steel ball to move horizontally in the opposite direction under the action of the second elastic body, re-locking the output piston, and at the same time the driving piston is unlocked and restored to the initial position, completing the unlocking of the air rudder and the gas rudder;

[0012] When the linkage unlocking mechanism is in the unlocked state, the first elastic body and the steel ball serve as redundant locking structures in the unlocked state, jointly providing a locking holding force to lock the output piston in the output stage piston cavity, and the driving piston remains stationary in the initial position under the action of the second elastic body.

[0013] Furthermore, during the unlocking process of the linkage unlocking mechanism, the driving piston reciprocates along the driving stage piston cavity, and the output piston moves unidirectionally along the output stage piston cavity.

[0014] Further, the output piston is a variable diameter cylindrical structure, the first section is a pin structure, and the through hole entering and exiting the output stage piston cavity is used to control the linkage and unlocking of the air rudder and the gas rudder; the second section is a piston body, which cooperates with the output stage piston cavity and moves in the cavity, and the outer wall surface of the piston body is provided with a first annular groove; the third section is a cylindrical section with the same diameter as the first annular groove; the cylindrical section cooperates with the steel ball to realize the locking of the output piston in the linkage state; the first annular groove cooperates with the steel ball to realize the locking of the output piston in the unlocked state;

[0015] The driving piston is also a variable diameter cylindrical structure, and the outer wall is provided with a second annular groove, which cooperates with the steel ball to unlock the output piston and lock the driving piston at the same time;

[0016] The output piston and the driving piston both have conical transition at the diameter change point, and a smooth transition is performed at the intersection point, so that when the output piston and the driving piston move in the piston cavity, a horizontal thrust is generated on the steel ball, causing the steel ball to move in a predetermined direction.

[0017] Furthermore, permanent magnet mounting holes and mounting holes are provided at both ends of the driving piston, and two permanent magnets are fixed in the mounting holes and mounting holes.

[0018] Furthermore, a buffer pad is installed on the side of the output stage piston cavity opposite to the opening end, and buffer pads and buffer pads are installed at both ends of the driving stage piston cavity respectively to reduce the impact force of the output piston and the driving piston when the state is switched.

[0019] Furthermore, the buffer pad is made of insulating material, and two separate reed grooves and reed slots are arranged in the buffer pad, and two reeds are installed in the grooves respectively; when the mechanism is in a linkage state, the two reeds are insulated; after the unlocking process is completed, under the action of the output piston, the reed is deformed and retracted into the groove, and the output piston contacts the two reeds, so that the two reeds are conductive, and the two reeds transmit signals to the controller through lead wires respectively, and feedback the working status of the mechanism.

[0020] Furthermore, in the output stage piston cavity, the buffer pad is fixedly installed in the screw sleeve hole; in the drive stage piston cavity, one end of an electromagnetic coil and a buffer pad are fixedly installed in the screw sleeve hole in sequence, and the other end of an electromagnetic coil and a buffer pad are symmetrically fixedly installed in the screw sleeve hole in sequence.

[0021] Furthermore, through holes are respectively provided in the middle of the screw sleeve and the buffer pad for resetting the output piston; through holes are respectively provided in the middle of the screw sleeve and the buffer pad for resetting the drive piston;

[0022] The unlocking state and the linkage state can be manually switched through external tooling operation, so that the linkage unlocking mechanism can be reused.

[0023] Furthermore, when the first elastomer and the second elastomer are in the extended state, the force exerted on the output piston and the driving piston is greater than the inertia force generated by the output piston and the driving piston of the linkage unlocking mechanism under the maximum overload condition, and sufficient margin is left, and the design margin is . times.

[0024] Furthermore, the electromagnetic coil power supply voltage is less than 24V.

[0025] The advantages of the present invention compared with the prior art are:

[0026] (1) Compared with the prior art, the present invention adopts a two-stage structure to realize linkage unlocking control, replacing the traditional pyrotechnic and electromagnetic type one-stage linkage unlocking mechanism. Among them, the driving stage is to energize the coil, drive the control state switching, and the output stage is based on the steel ball lock principle and elastic elements to realize the redundant design of the unlocking state locking structure, and realize the reliable locking of the output piston locking state under high load conditions, solving the problems of low locking retention force, long-term power-on, and inability to repeat tests in the prior art, realizing the effect of high-power output locking force at the output stage by relying on low-voltage small signal drive at the driving stage, relying on the joint action of the steel ball and the first elastic body to realize the locking of the output piston under high load conditions, and effectively improving the working reliability under complex conditions.

[0027] (2) The present invention adopts a de-energized linkage unlocking state locking scheme, and both the linkage and unlocking state locking and holding are in the de-energized state. During the working process, the electromagnetic coil only needs to be energized for a short time when the state is switched to form a drive signal. The linkage and unlocking states are both in the de-energized state of the mechanical locking structure. By setting a steel ball and an elastic body to jointly lock the output piston, the working performance of the mechanism under complex working conditions such as long time, vibration and impact is improved, and the problems of the electromagnetic mechanism requiring long-term power supply, small locking holding force and unreliability are avoided.

[0028] (3) The present invention sets up a redundant driving structure of dual electromagnetic coils and dual permanent magnets. When the state is switched, the two electromagnetic coils are energized at the same time, forming attraction and repulsion with the two permanent magnets respectively, thereby achieving a redundant driving force design effect.

[0029] (4) The present invention adopts a mechanical locking solution to replace the traditional pyrotechnic mechanism high-pressure gas locking method. While ensuring a large locking holding force, it solves the problem of reusability and greatly reduces costs. It can be freely reset in both the linked and unlocked states, and can achieve free switching between the linked and unlocked states, meeting the repeated testing requirements during debugging and testing.

[0030] (5) The present invention provides feedback of working status information. Two feedback reeds are installed in the buffer structure on one side of the output piston. The reeds are connected by wires and led out by the mechanism, and the working status of the mechanism is led out to the system closed loop for use. The buffer structure for installing the reeds is made of insulating material. When the mechanism is in the linkage state, the two reeds are insulated from each other; when the mechanism is in the unlocked state, the output piston moves to the top of the output piston cavity and contacts the two reeds at the same time. The reeds are compressed and deformed and maintain reliable contact with the output piston. At this time, the two reeds are connected through the output piston.

[0031] (6) The present invention designs a vibration-damping and buffering structure in both the driving-stage piston chamber and the output-stage piston chamber, and can select and design matching materials according to specific working conditions, thereby reducing the impact on the mechanism after the driving piston and the output piston are in place during the state switching process.

[0032] (7) The permanent magnet and the driving piston, the spring and the buffer gasket and other fixed connection parts designed in the present invention eliminate the traditional screw or rivet installation method, and adopt a combination of interference fit and epoxy potting. While effectively ensuring the reliability of the connection and fixation of the components, it achieves the effect of simplified system design and miniaturization design, and adapts to the extremely tight size and space of the spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic diagram of the linkage state of the mechanism in the embodiment of the present invention;

[0034] Figure 2 This is a schematic diagram of the mechanism unlocking process in an embodiment of the present invention;

[0035] Figure 3 This is a schematic diagram of the unlocking state of the mechanism in an embodiment of the present invention;

[0036] Figure 4 It is a structural schematic diagram of a housing in an embodiment of the present invention;

[0037] Figure 5 This is a schematic diagram of the structure of the driving piston in an embodiment of the present invention;

[0038] Figure 6 Schematic diagram of the structure of the buffer pad in an embodiment of the present invention. DETAILED DESCRIPTION

[0039] In order to better understand the technical solution of the present invention, the embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. The parts of each structure in the accompanying drawings will be described separately. It is worth noting that the elements not shown in the figures or not described in words are in a form known to ordinary technicians in the relevant technical field. The description of the embodiments herein, any reference to directions and orientations, are only for the convenience of description and should not be construed as limiting the scope of protection of the present invention. The following description of the preferred embodiments will involve a combination of features, which may exist independently or in combination, and the present invention is not particularly limited to the preferred embodiments.

[0040] The schematic diagram of the linkage unlocking mechanism provided in this embodiment can be found in Figure 1 , designed as a two-stage structure, including a driving stage and an output stage, wherein the output stage includes an output piston 2, a reed 3, a buffer pad 4, a screw sleeve 5 and a first elastomer 6; the driving stage includes a second elastomer 7, a steel ball 8, a driving piston 9, two permanent magnets 10, a buffer pad 11, a buffer pad 12, two electromagnetic coils 13, a screw sleeve 14 and a screw sleeve 15; the driving stage relies on a low-voltage small signal to power the two electromagnetic coils 13 to achieve driving; the output stage is a high-power output, based on the first elastomer 6 and the steel ball 8, to achieve reliable locking of the output piston 2 under large load conditions.

[0041] The drive stage and the output stage are arranged together in the housing 1. The structure of the housing 1 is as follows: Figure 4 As shown, the housing 1 includes an output-stage piston chamber 101 and a driving-stage piston chamber 102 arranged in parallel on the left and right. A steel ball movement chamber 103 is provided on the wall between the two piston chambers to accommodate the steel ball 8, which is a movement channel for the steel ball 8 and realizes the movement guidance and position fixation of the steel ball 8; an output piston 2 is provided in the output-stage piston chamber 101, and a through hole is provided on the shell wall at one end of the cavity for the output piston 2 to enter and exit, and a first elastic body 6 is provided between the output piston 2 and the opening end to generate elastic force along the axial direction of the cavity; electromagnetic coils 13 are respectively installed at both ends of the driving-stage piston chamber 102, and a driving piston 9 is provided in the cavity, and permanent magnets with opposite magnetic field directions are installed at both ends of the driving piston 9. 10, and respectively form a redundant driving structure with the two electromagnetic coils 13, one end of which is attracted and the other end is repelled; a second elastic body 7 is also installed in the cavity, and the installation direction of the second elastic body 7 relative to the driving piston 9 is the same as the direction of the first elastic body 6 relative to the output piston 2; under the coordinated action of the electromagnetic force at both ends and the elastic force of the second elastic body 7, the driving piston 9 reciprocates along the driving stage piston cavity 102, so that the steel ball 8 moves horizontally in the steel ball movement cavity 103, controls the locking or unlocking of the output piston 2, and makes the output piston 2 move under the drive of the elastic force of the first elastic body 6, and reaches the unlocking state through the unlocking process from the linkage state, thereby realizing the linkage and unlocking of the air rudder and the gas rudder.

[0042] Preferably, the housing 1 is made of aluminum alloy to reduce the weight of the mechanism, and the roughness of the piston cavity is required to be above 0.8; considering the connection strength of the mechanism and repeated test wear, the piston is made of stainless steel with a heat treatment HRC ≥ 40. When installing the piston, apply an appropriate amount of grease to the piston and the piston cavity to reduce friction and ensure smooth movement.

[0043] Preferably, the electromagnetic coil power supply voltage is 24 V. The permanent magnet 10 is made of samarium cobalt magnet with strong magnetism, high temperature resistance and strong anti-demagnetization ability.

[0044] In a possible implementation, the output piston 2 is a variable diameter cylindrical structure, the first section is a pin structure, and the through hole that enters and exits the output stage piston cavity 101 is used to control the linkage and unlocking of the air rudder and the gas rudder; the second section is a piston body, which cooperates with the output stage piston cavity 101 and moves in the cavity, and a first annular groove is provided on the outer wall surface of the piston body; the third section is a cylindrical section with the same diameter as the first annular groove; the cylindrical section cooperates with the steel ball 8 to achieve the locking of the output piston 2 in the linkage state; the first annular groove cooperates with the steel ball 8 to achieve the locking of the output piston 2 in the unlocked state.

[0045] In a possible implementation, the driving piston 9 is also a variable diameter cylindrical structure, such as Figure 5 As shown, the outer wall surface is provided with a second annular groove 902, which cooperates with the steel ball 8 to unlock the output piston 2 and lock the driving piston 9 at the same time; permanent magnet mounting holes 901 and mounting holes 903 are provided at both ends of the driving piston 9, and two permanent magnets 10 are pressed into the mounting holes 901 and mounting holes 903 by interference fit, and are fixed by epoxy resin encapsulation after being pressed into place.

[0046] The output piston 2 and the driving piston 9 have a conical transition at the diameter change point, and a smooth transition is performed at the intersection, so that when the output piston 2 and the driving piston 9 move in the piston cavity, a horizontal thrust is generated on the steel ball 8, causing the steel ball 8 to move in a predetermined direction.

[0047] Preferably, in order to improve the system response speed, the output piston 2 and the drive piston 9 are both designed with a hollow structure, which can reduce the mass of moving parts as much as possible while ensuring the strength requirements, thereby improving the system response speed and the ability to resist acceleration and impact environments.

[0048] In a possible implementation, a buffer pad 4 is installed on the side of the output stage piston chamber 101 opposite to the opening end, and buffer pads 11 and 12 are respectively installed at both ends of the driving stage piston chamber 102 to reduce the impact force of the output piston 2 and the driving piston 9 when the state is switched.

[0049] Preferably, the buffer pads 4 , 11 and 12 can be made of different materials and have different thicknesses according to the specific design of the first elastomer 6 and the second elastomer 7 . The materials include but are not limited to rubber buffer pads, polytetrafluoroethylene buffer pads and metal buffer pads.

[0050] In a possible implementation, the buffer pad 4, such as Figure 6 As shown, it is made of insulating material. Two separate reed slots 401 and 403 are set in the buffer pad 4. Two reeds 3 are installed in the slots respectively. The size of the reed slot is slightly larger than the size of the reed, ensuring that when the output piston 2 is in the unlocked state and contacts the buffer pad, the reed can be deformed and retracted into the slot; the reed 3 is fixed in the reed slot by interference fitting, ensuring reliable installation and realizing product miniaturization design. The reed 3 is provided with a lead wire connected to the controller to provide a feedback signal after unlocking. After the unlocking process is completed, under the action of the output piston 2, the reed 3 is deformed and retracted into the slot, and the output piston 2 is in reliable contact with the two reeds 3, so that the two reeds 3 are turned on. The two reeds 3 transmit the unlocked signal to the controller through the lead wires, respectively, to feedback the working state of the mechanism.

[0051] Preferably, the reed 3 is pressed into the buffer pad 4 by interference fitting to ensure insulation between the reed 3 and the housing 1. After the buffer pad 4 and the reed 3 are installed in place, epoxy resin is used for potting and reinforcement.

[0052] Preferably, the reed 3 is made of an elastic material with good elasticity and fatigue resistance, and the compression of the reed is controlled after the output piston 2 is unlocked to avoid plastic deformation during repeated testing, which causes the contact pressure between the reed 3 and the output piston 2 to drop.

[0053] In a possible implementation, in the output stage piston chamber 101, the buffer pad 4 is installed in the hole of the screw sleeve 5; in the driving stage piston chamber 102, an electromagnetic coil 13 and a buffer pad 11 are installed in sequence in the hole of the screw sleeve 14 at one end, and another electromagnetic coil 13 and a buffer pad 12 are installed in sequence in the hole of the screw sleeve 15 at the other end; all are potted and fixed before being installed in the housing 1.

[0054] Preferably, the ends of the screw sleeve 5 and the screw sleeve 14 are designed with binding holes for binding with stainless steel wire to prevent loosening, so as to prevent the screw sleeve from loosening after multiple test impacts.

[0055] In a possible implementation, through holes are respectively provided between the screw sleeve 5 and the buffer pad 4 for resetting the output piston 2; through holes are also respectively provided between the screw sleeve 14 and the buffer pad 11 for resetting the drive piston 9 when no power is supplied; through external tooling operation, free switching between the linkage state and the unlocking state is achieved, so that the linkage unlocking mechanism can be reused.

[0056] When the first elastic body 6 and the second elastic body 7 are in the extended state, the force exerted on the output piston 2 and the driving piston 9 is greater than the inertia force under the maximum overload and has a sufficient margin.

[0057] Preferably, the margin value is 1.5 times, that is, the maximum overload a of the linkage unlocking mechanism max =50g, according to the mass m2 of the output piston 2 and the mass m9 of the driving piston 9, the maximum inertia force F of the output piston 2 is calculated 2max =m2×a max , the maximum inertia force F of the driving piston 9 is calculated in the same way 9max The force F exerted by the first elastic body 6 on the output piston 2 in the extended state s6 =k6×Δx6≥1.5F 2max , k6 is the stiffness coefficient of the first elastic body 6, Δx6 is the compression of the first elastic body, and similarly, the second elastic body 7 exerts a force F on the piston in the extended state. s7 =k7×Δx7≥1.5F 9max , k7 is the stiffness coefficient of the second elastic body 7, Δx7 is the compression of the second elastic body. The minimum elastic force design values ​​F of the first elastic body 6 and the second elastic body 7 are obtained respectively. s6 and F s7 , ensuring that the output piston 2 and the drive piston 9 remain effectively fixed under the action of the first elastic body 6 and the second elastic body 7 under the maximum overload condition.

[0058] During the operation of the linkage unlocking mechanism, power is only required during the unlocking process, and both the linkage state and the unlocking state are de-energized; specifically:

[0059] like Figure 1 As shown, when the linkage unlocking mechanism is in the linkage state, the driving piston 9 reaches the top of the driving stage piston cavity 102 under the action of the second elastic body 7 and contacts the buffer pad 11; the steel ball 8 falls into the connection between the top cylindrical section of the output piston 2 and the transition cone section, and the right side is restricted by the cylindrical section of the driven piston 9 and cannot move, locking the output piston 2, so that the pin section of the output piston 2 remains extended out of the output stage piston cavity 101, and the air rudder and the gas rudder are controlled to be linked;

[0060] like Figure 2As shown, when the linkage unlocking mechanism needs to be unlocked, it enters the unlocking process, so that the electromagnetic coils 13 at both ends are energized, the upper permanent magnet is subjected to repulsive force, and the lower permanent magnet is subjected to attractive force. The driving piston 9 moves to the other end of the driving piston cavity 102 under the action of the electromagnetic field, compressing the second elastic body 7. When the bottom of the driving piston 9 contacts the buffer pad 12, the driving piston 9 moves to the position. At this time, the second annular groove 902 of the driving piston 9 moves to the position of the steel ball 8, and the limit of the steel ball 8 is released. The output piston 2 pushes the steel ball 8 to move horizontally under the action of the first elastic body 6, and pushes the steel ball 8 into the second annular groove 902 of the driving piston 9. The output piston 2 is unlocked and the driving piston 9 is locked. The output piston 2 moves from the outside to the inside until it completely enters the output stage piston cavity 101, contacts the reed 3 and squeezes and deforms into the reed groove, and finally contacts the buffer pad 4 to reach the unlocking position. At this time, the first annular groove of the output piston 2 moves to the position of the steel ball 8, and the limit of the steel ball 8 is released, and the driving piston 9 is unlocked at the same time. The electromagnetic coils 13 at both ends are powered off, and the driving piston 9, under the action of the second elastic body 7, pushes the steel ball 8 to move horizontally in the opposite direction, and pushes the steel ball into the first annular groove of the output piston 2. After that, the cylindrical section of the driving piston 9 cooperates with the steel ball 8 to limit the steel ball 8 and re-lock the output piston 2. The driving piston 9 continues to move upward to return to the initial position and maintain it, completing the unlocking of the air rudder and the gas rudder;

[0061] like Figure 3 As shown, when the linkage unlocking mechanism is in the unlocking state, the pin section of the output piston 2 is locked in the output stage piston cavity 101 under the dual action of the first elastic body 6 and the steel ball 8, and the driving piston 9 is in the initial position and remains stationary.

[0062] When the unlocking is completed and reset is required during the adjustment process, the driving piston 9 is pushed to the other end of the driving piston cavity to the unlocking position through the middle through hole of the screw sleeve 14 and the buffer pad 11 using a tool. At this time, the annular groove 902 of the driving piston 9 moves to the position of the steel ball 8, and the electromagnetic coil 13 can also achieve the same effect by energizing; at this time, the output piston 2 is pushed by the middle through hole of the screw sleeve 5 and the buffer pad 4 to compress the first elastic body 6, and the conical surface of the first annular groove of the output piston 2 pushes the steel ball 8 into the groove of the driving piston 9; the output piston 2 is continued to be pushed until its top cylindrical section moves to the steel ball position, at this time, the tool of the driving piston 9 can be revoked, and the driving piston 9 moves to the top of the driving stage piston cavity 102 under the action of the second elastic body 7, and at the same time pushes the steel ball to fall into the connection between the cylindrical section of the output piston 2 and the transition cone section, and the driving piston 9 continues to move until it contacts the buffer pad 11, at this time, the mechanism is in a linkage state, the steel ball 8 cooperates with the cylindrical section of the driving piston 9 and is limited, the output piston 2 is locked, and can be reliably extended without retraction, and the two driving parts of the air rudder and the gas rudder are locked to achieve a linkage effect.

[0063] It is to be understood that the present invention is described by way of embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and embodiments that can fall within the scope of the claims of this application all fall within the scope protected by the present invention.

[0064] The contents not described in detail in the specification of the present invention belong to the common knowledge of those skilled in the art.

Claims

1. A linkage unlocking mechanism for air rudder and gas rudder based on a steel ball lock, characterized in that: The design is a two-stage structure, wherein the driving stage and the output stage are arranged together in a housing (1), the housing (1) is provided with an output stage piston chamber (101) and a driving stage piston chamber (102) arranged in parallel on the left and right, and a steel ball movement chamber (103) is provided on the wall between the two piston chambers to accommodate a steel ball (8); An output piston (2) is arranged in the output stage piston chamber (101), a through hole is opened on the shell wall at one end of the chamber for the output piston (2) to enter and exit, and a first elastic body (6) is arranged between the output piston (2) and the hole end to generate elastic force along the axial direction of the chamber; Electromagnetic coils (13) are respectively installed at both ends of the driving stage piston chamber (102), a driving piston (9) is arranged between the two electromagnetic coils (13), and permanent magnets (10) with opposite magnetic field directions are installed at both ends of the driving piston (9), forming redundant driving structures with the two electromagnetic coils (13), one end attracts and the other end repels; a second elastic body (7) is also installed in the driving stage piston chamber (102), and the installation direction of the second elastic body (7) relative to the driving piston (9) is the same as the direction of the first elastic body (6) relative to the output piston (2); Under the coordinated action of the electromagnetic forces at both ends and the elastic force of the second elastic body (7), the driving piston (9) moves along the driving stage piston chamber (102), causing the steel ball (8) to move horizontally in the steel ball movement chamber (103), thereby controlling the output piston (2) to be locked or unlocked. The output piston (2) moves under the drive of the elastic force of the first elastic body (6), and reaches the unlocked state through the unlocking process from the linkage state, thereby realizing the linkage and unlocking state switching of the air rudder and the gas rudder.

2. The air rudder and gas rudder linkage unlocking mechanism based on the steel ball lock according to claim 1 is characterized by: The linkage unlocking mechanism only needs to be powered on during the unlocking process, and is de-energized in both the linkage state and the unlocking state; When the linkage unlocking mechanism is in the linkage state, the driving piston (9) is in the initial position and remains stationary under the action of the second elastic body (7), and the output piston (2) is locked by the cooperation between the steel ball (8) and the driving piston (9), so that the output piston (2) remains extended out of the output stage piston chamber (101), thereby controlling the linkage of the air rudder and the gas rudder; During the unlocking process of the linkage unlocking mechanism, the electromagnetic coils (13) at both ends are energized, and the driving piston (9) overcomes the force of the second elastic body (7) under the action of the electromagnetic field and moves. After the movement reaches the desired position, the limit of the steel ball (8) is released, and the output piston (2) pushes the steel ball (8) to move horizontally under the action of the first elastic body (6), the output piston (2) is unlocked, and the driving piston (9) is locked at the same time, and the output piston (2) moves from outside to inside until it completely enters the output stage piston cavity (101); the electromagnetic coils (13) at both ends are de-energized, and the driving piston (9) pushes the steel ball (8) to move horizontally in the opposite direction under the action of the second elastic body (7), and the output piston (2) is re-locked, and the driving piston (9) is unlocked and restored to the initial position, thereby completing the unlocking of the air rudder and the gas rudder; When the linkage unlocking mechanism is in the unlocking state, the first elastic body (6) and the steel ball (8) serve as a redundant locking structure in the unlocking state, jointly providing a locking holding force to lock the output piston (2) in the output stage piston chamber (101), and the driving piston (9) is in the initial position and remains stationary under the action of the second elastic body (7).

3. The air rudder and gas rudder linkage unlocking mechanism based on the steel ball lock according to claim 2 is characterized by: During the unlocking process of the linkage unlocking mechanism, the driving piston (9) reciprocates along the driving stage piston chamber (102), and the output piston (2) moves unidirectionally along the output stage piston chamber (101).

4. The air rudder and gas rudder linkage unlocking mechanism based on the steel ball lock according to claim 2 is characterized in that: The output piston (2) is a variable diameter cylindrical structure, the first section is a pin structure, which enters and exits the through hole of the output stage piston cavity (101) and is used to control the linkage and unlocking of the air rudder and the gas rudder; the second section is a piston body, which cooperates with the output stage piston cavity (101) and moves in the cavity, and the outer wall surface of the piston body is provided with a first annular groove; the third section is a cylindrical section with the same diameter as the first annular groove; the cylindrical section cooperates with the steel ball (8) to achieve the locking of the output piston (2) in the linkage state; the first annular groove cooperates with the steel ball (8) to achieve the locking of the output piston (2) in the unlocking state; The driving piston (9) is also a variable diameter cylindrical structure, and a second annular groove is provided on the outer wall surface, which cooperates with the steel ball (8) to unlock the output piston (2) and lock the driving piston (9) at the same time; The output piston (2) and the driving piston (9) both adopt a conical transition at the diameter change point, and a smooth transition is performed at the intersection point, so that when the output piston (2) and the driving piston (9) move in the piston cavity, a horizontal thrust is generated on the steel ball (8), causing the steel ball (8) to move in a predetermined direction.

5. The air rudder and gas rudder linkage unlocking mechanism based on the steel ball lock according to claim 1 is characterized in that: A permanent magnet mounting hole (901) and a mounting hole (903) are provided at both ends of the driving piston (9), and two permanent magnets (10) are fixed in the mounting holes (901) and the mounting holes (903).

6. The air rudder and gas rudder linkage unlocking mechanism based on the steel ball lock according to claim 1 is characterized by: A buffer pad (4) is installed on the side of the output stage piston chamber (101) opposite to the opening end, and a buffer pad (11) and a buffer pad (12) are installed on both ends of the drive stage piston chamber (102) to reduce the impact force of the output piston (2) and the drive piston (9) when the state is switched.

7. The air rudder and gas rudder linkage unlocking mechanism based on the steel ball lock according to claim 6 is characterized by: The buffer pad (4) is made of insulating material. Two separate reed slots (401) and a reed slot (403) are arranged in the buffer pad (4), and two reeds (3) are respectively installed in the slots. When the mechanism is in a linkage state, the two reeds (3) are in an insulating state. After the unlocking process is completed, under the action of the output piston (2), the reed (3) is deformed and retracted into the slot, and the output piston (2) contacts the two reeds (3), so that the two reeds (3) are turned on. The two reeds (3) transmit signals to the controller through lead wires respectively, and the working state of the mechanism is fed back.

8. The air rudder and gas rudder linkage unlocking mechanism based on the steel ball lock according to claim 6 is characterized by: In the output stage piston chamber (101), a buffer pad (4) is fixedly installed in the hole of a screw sleeve (5); in the drive stage piston chamber (102), one end of an electromagnetic coil (13) and a buffer pad (11) are fixedly installed in sequence in the hole of a screw sleeve (14), and the other end of an electromagnetic coil (13) and a buffer pad (12) are symmetrically fixedly installed in sequence in the hole of a screw sleeve (15).

9. The air rudder and gas rudder linkage unlocking mechanism based on the steel ball lock according to claim 8 is characterized by: Through holes are respectively arranged in the middle of the screw sleeve (5) and the buffer pad (4) for resetting the output piston (2); through holes are respectively arranged in the middle of the screw sleeve (14) and the buffer pad (11) for resetting the drive piston (9); and manual switching between the unlocking state and the linkage state is achieved through external tooling operation, so that the linkage unlocking mechanism can be reused.

10. The air rudder and gas rudder linkage unlocking mechanism based on the steel ball lock according to claim 1 is characterized in that: When the first elastic body (6) and the second elastic body (7) are in an extended state, the force exerted on the output piston (2) and the drive piston (9) is greater than the inertia force generated by the output piston (2) and the drive piston (9) of the linkage unlocking mechanism under the maximum overload condition, and a sufficient margin is left, and the design margin is 1.5 times.

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