An electro-mechanical integrated height-time control emergency separation device and method

Abstract

This application relates to the field of automatic control technology for aviation life-saving equipment, and specifically relates to an electromechanical integrated altitude-time control emergency separation device and method. It includes a timing spring assembly A, a locking lever assembly B, an altitude control assembly C, a start switch assembly D, and a timing gear assembly E. This altitude-time control separation device can reasonably set working parameters according to the actual combat area, and implement different separation and life-saving unlocking logics according to different altitude requirements. In plains or high-altitude areas, this device serves as a backup control, and only outputs effective pilot-seat separation and parachute ejection actions when the seat program controller fails; in individual ultra-high-altitude areas, this device plays a major control role. After the pilot activates the separation device, it outputs pilot-seat separation and parachute ejection actions at the set altitude and time. The separation timing of this device is precisely controllable and has high reliability.

Description

Technical Field

[0001] This application relates to the technical field of automatic control of aviation life-saving equipment, and specifically relates to an electromechanical integrated altitude-time control emergency separation device and method. Background Art

[0002] To ensure the safety and reliability of ejection life-saving, ejection seats usually adopt two electronic program controllers to achieve safe life-saving for pilots when the seats are ejected from the aircraft. The structures and working principles of the two electronic program controllers are exactly the same, and there are risks of common-mode failures and single-point failures; in addition, to meet the requirements of parachute ejection life-saving in most regions, the maximum opening altitude of the existing program controllers is generally set at a fixed altitude (such as 7 km). However, there are many high-altitude regions in China, and there is a need for life-saving at higher altitudes. Therefore, an emergency separation device with time-altitude control function needs to be added to ensure that the separation of the person and the seat and the parachute ejection work can be achieved regardless of whether the seat inertial navigation or the program controller is working, and at the same time, the requirements for high-altitude life-saving in individual cases can be solved.

[0003] Most of the existing emergency separation devices use manual switch controllers to control the output of the pyrotechnic mechanism. To reduce system complexity, there is no time-altitude control circuit, so it cannot meet the requirements of active life-saving at different altitudes. Most of the existing mechanical unlocking devices that can achieve time-altitude control output in a cable pulling-off manner, which cannot match the electronic pyrotechnic mechanism, and the locking process is complex, and the seat needs to be disassembled and assembled, affecting the requirements of combat rapid response. Summary of the Invention

[0004] The object of the present invention: Design an electromechanical integrated altitude-time control emergency separation device, which can be locked and the unlocking altitude can be adjusted in the seat installation state to meet the life-saving requirements of the seat under high-altitude conditions.

[0005] Technical Solution

[0006] An electromechanical integrated altitude-time control emergency separation device includes a timing spring assembly A, a locking lever assembly B, an altitude control assembly C, a start switch assembly D, a timing gear assembly E, etc.

[0007] The timing spring assembly A includes a timing spring 3, the timing spring 3 is fixedly connected with an adjusting nut 2, the adjusting nut 2 is an external hexagonal nut, which is matched with the hexagonal hole at the corresponding position of the housing 17 and can slide but not rotate in the square hole; an adjusting screw 1 passes through the housing 17 and is connected with the adjusting nut 2 by threads, and the tension of the timing spring 3 is adjusted by rotating the adjusting screw 1.

[0008] The locking lever assembly B includes a locking lever 5, which is connected to the rotating shaft 7 through a one-way bearing 8, and the rotating shaft 7 is fastened to the transmission rod 6 through a special-shaped surface. The transmission rod 6 is connected to the steering link 4 through a pin and can rotate flexibly; the steering link 4 is connected to the timing spring 3 through a pin and can rotate flexibly; the locking lever 9 is connected to the locking lever 5 through the rotating shaft 7; the fan gear 16 is connected to the locking lever through the rotating shaft 7; by turning the locking lever 5, the timing spring 3 is stretched to generate elastic potential energy, and at the same time, the locking lever 9 and the fan gear 16 are driven to rotate to the starting position.

[0009] The height control component C includes a bellows component 24, which is tightly connected to the brake rod 10, and the bellows component 24 is connected to the height dial 20. The height dial 20 has a gear structure and is meshed with an adjusting gear 21. The adjusting gear 21 is tightly connected to an adjusting screw 22. The adjusting screw 22 is mounted on the housing 17, and a height observation window 19 is mounted on the housing 17 to observe the set height position. When achieving height control, the bellows component 24 is rotated by rotating the adjusting screw 22 to control the extension length of the brake rod 10 to limit the rotation of the locking lever 9, thereby controlling the movement of the mechanism.

[0010] The starting switch assembly D includes a locking claw 11, which is connected to a transmission connecting rod 13, a return spring 14 installed on the transmission connecting rod 13 and pressed against a housing 17, and a starting pull pin 12 installed on the housing 17 and connected to the transmission connecting rod 13 through an inclined surface; after the starting pull pin 12 is pulled out, the return spring 14 pulls the locking claw 11 to rotate under the action of elastic force, and releases the locking lever 9 to start the emergency separation device.

[0011] The timing gear assembly E includes a sector gear 16, which is meshed with a transmission gear assembly 18 through gears, and a ratchet in the transmission gear assembly 18 cooperates with a balance pendulum 15; the timing spring 3 pushes the transmission gear assembly 18 to move through the sector gear 16, and drives the balance pendulum 15 to rotate periodically to achieve a delay function; the other end of the sector gear 16 contacts a micro switch 23 to control the on and off of the circuit.

[0012] Preferably, the contact surface between the adjusting screw 1 and the housing 17 is engraved with patterns to increase friction and prevent the adjusting screw from rotating during use.

[0013] Preferably, the timing spring 3 is composed of double-layer helical springs connected in parallel, which reduces the volume while ensuring the tension.

[0014] Preferably, the locking lever 9 is made of stainless steel and its hardness is increased to HRC62-68 through heat treatment. At the same time, the edge of the contact position with the brake rod 10 is rounded by R0.2 to prevent damage to the edge of the contact position, which would lead to reduced height accuracy.

[0015] Preferably, the brake lever 10 is made of stainless steel material and its hardness is increased to HRC52 - 58 through heat treatment, and at the same time, the end face is chamfered with a fillet radius of R0.2.

[0016] Preferably, the roughness of the surfaces of the locking lever 9 and the brake lever 10 where they have relative movement is not greater than Ra0.2, ensuring flexible relative movement.

[0017] Preferably, the roughness of the surfaces of the locking lever 9 and the locking claw 11 where they have relative movement is not greater than Ra0.2, ensuring flexible relative movement.

[0018] Preferably, the bellows assembly 24 is composed of multiple diaphragms, reducing the volume of the bellows on the premise of ensuring the size before effective displacement.

[0019] Preferably, the end face of the starting pull pin 12 is an inclined plane, and the roughness of the surfaces of the starting pull pin 12 and the transmission connecting rod 13 where they have relative movement is not greater than Ra0.2, ensuring flexible relative movement.

[0020] Preferably, a locking insurance is also provided on the starting pull pin 12 to prevent slipping off.

[0021] Preferably, two or three microswitches 23 are installed in parallel to improve the reliability of signal input.

[0022] In a second aspect, the present application provides an electromechanical integrated height - time controlled emergency separation method, which is used for the above - mentioned emergency release device, and the method includes:

[0023] Step 1: The emergency handle is activated to pull off the starting pull pin 12 connected to the emergency handle;

[0024] Step 2: The locking claw 11 releases the locking lever 9, and the timing spring 3 drives the transmission gear combination 18 to rotate to start the delay operation;

[0025] Step 3: When the locking lever 9 rotates to the contact position with the brake lever 10, the altitude where the device is located is judged: If the altitude is higher than the set height of the emergency release device, the brake lever 10 locks the locking lever 9, and the transmission gear combination 18 stops rotating until the emergency release device descends to the set height, and the brake lever 10 contracts to release the locking lever 9, and the mechanism continues to move; If the altitude is lower than the set height of the emergency release device, the brake lever 10 cannot lock the locking lever 9, and the transmission gear assembly continues to move;

[0026] Step 4: The timing spring 3 drives the sector gear 16 to rotate until it presses the microswitch 23 to close, outputting an ignition signal, and the mechanism moves until the locking lever 9 is blocked by the stop pin to complete the operation.

[0027] Preferably, the delay time and the accuracy of adjusting the delay time can be adjusted by the adjusting screw 1.

[0028] Preferably, the remaining delay time after setting the altitude of the descent value can be set by adjusting the position of the locking lever 9.

[0029] Technical effects

[0030] 1) This altitude-time control separation device can reasonably set working parameters according to the actual combat area, and implement different separation and rescue unlocking logics according to different altitude requirements. In plains or high-altitude areas, this device acts as a backup control, and only outputs effective pilot-seat separation and parachute ejection actions when the seat program controller fails; in individual ultra-high-altitude areas, this device acts as the main control. After the pilot activates the separation device, it outputs pilot-seat separation and parachute ejection actions at the set altitude and time. The separation timing of this device is precisely controllable and highly reliable;

[0031] 2) This altitude-time control separation device has a simple locking operation, which can be carried out without disassembling and assembling the seat. At the same time, the altitude-time setting method is simple, can be flexibly changed according to the combat area, and can quickly respond to combat needs;

[0032] 3) This altitude-time control separation device can not only be used in the field of aviation rescue, such as being used as an emergency separation device for seats, an automatic unlocking device for paratroopers, and an automatic detachment device for airdropped supply packages; it can also be applied to the field of high-altitude observation, such as a device for dropping or recovering high-altitude detection equipment, etc.

[0033] 4) This altitude-time control separation device has a simple structure, can be reused multiple times, is simple to use and maintain, and has a low cost. Description of the drawings

[0034] Figure 1 It is a schematic diagram of the external shape of the emergency detachment device, with a partial cross-section of the upper cover;

[0035] Figure 2 It is a structural composition diagram of the emergency detachment device, with a partial cross-section of the hidden upper cover and upper flat plate;

[0036] Figure 3 It is a schematic diagram of the back structure of the emergency detachment device

[0037] Among them, A - timing spring assembly, B - locking lever assembly, C - height control assembly, D - start switch assembly, E - timing gear assembly, 1 - 1. adjusting screw, 2 - adjusting nut, 3 - timing spring, 4 - steering link, 5 - locking lever, 6 - transmission rod, 7 - rotating shaft, 8 - one-way bearing, 9 - locking lever, 10 - brake rod, 11 - locking claw, 12 - starting pull pin, 13 - transmission link, 14 - return spring, 15 - balance swing piece, 16 - sector gear, 17 - housing, 18 - transmission gear combination, 19 - height observation window, 20 - height scale, 21 - adjusting gear, 22 - adjusting screw, 23 - micro switch, 24 - bellows assembly. Specific embodiments

[0038] The present invention will be further described below in conjunction with embodiments. The following are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0039] The emergency escape device is the last line of defense for ejection escape. When the output of the electronic program controller fails or in other emergency situations, the pilot needs to manually activate the emergency escape device to achieve ejection escape.

[0040] As Figure 2 , 3 shown, an electro-mechanical integrated height-time control emergency separation device includes a timing spring assembly A, a locking lever assembly B, a height control assembly C, a start switch assembly D, a timing gear assembly E, etc.

[0041] The timing spring assembly A, as the total power source of the device, is a core component. Under the condition of space limitation, it is composed of two-layer springs in parallel to ensure that the output elastic force meets the requirements. One end of the timing spring 3 is welded and fixedly connected to the adjusting nut 2. The hexagonal rod of the adjusting nut 2 is installed in the hexagonal hole of the housing 17 and can move flexibly in the hole. The adjusting screw 1 is connected to the adjusting nut 2 through the through hole of the housing 17. The connecting thread is a self-locking thread and can be self-locked under the tensile load of the timing spring 3. The combination of the adjusting screw 1 and the adjusting nut 2 is the key component for time control. By adjusting the pre-tightening tensile force of the timing spring 3, the function of setting the unlocking delay time and adjusting the delay accuracy can be achieved.

[0042] The locking lever assembly B is the locking assembly of the emergency disengagement device, and the device can be locked by toggling the locking lever 5. The locking lever 5 is connected to the rotating shaft 7 through the one-way bearing 8, and can only rotate in one direction. After the one-way locking is completed, there is no resistance to the reverse rotation of the rotating shaft 7, which can prevent the external load from affecting the timing accuracy; the rotating shaft 7 is fixedly connected with the transmission rod 6, the locking lever 8 and the sector gear 16 in sequence through the special-shaped surface or the pin method; the transmission rod 6 is connected to the timing spring 3 through the steering link 4 to prevent the spring from being subjected to the torque during movement, which causes the timing accuracy to exceed the tolerance;

[0043] The height control component C is the core component of the device. The air pressure at different altitudes is converted into a displacement parameter through the bellows component 24. The bellows component 24 is welded to the brake rod 10. The movement of the locking lever 9 is controlled by the elongation of the brake rod 10 to achieve height control. The bellows component 24 is fixedly connected to the height dial 20. The height dial 20 is pasted with words to indicate the height value when the device is debugged. The height dial 20 is meshed with an adjusting gear 21 fixedly connected to an adjusting screw 22 through gear teeth. The adjusting screw 22 is installed on the housing 17. The unlocking height can be set by rotating the adjusting screw 22, and the height setting status can be observed through the height observation window 19.

[0044] The start switch assembly D is the control switch of the device. The start pin 12 is connected to the emergency handle on the seat. When the emergency handle is activated, the device starts to work. A cotton thread is used to secure the start pin and the housing 17 to prevent accidental removal. The transmission link 13 is sleeved with a return spring 14 and is installed on the housing. One end of the transmission link 13 is connected to the start pin 12 through an inclined surface and can slide relatively. The other end is connected to the locking claw 11. When the start pin 12 is inserted into the device, the transmission link 13 drives the locking claw 11 to rotate counterclockwise to lock the locking lever 9. When the start pin 12 is pulled out, the locking claw 11 rotates clockwise under the action of the return spring 14 to release the restriction on the locking lever 9.

[0045] The timing gear assembly E is composed of a sector gear 16, a transmission gear assembly 18 and a balance pendulum 15. The timing spring assembly A drives the transmission gear assembly 18 and the balance pendulum 15 to move through the sector gear 16, and the delay function is realized through the periodic swing of the balance pendulum 15; the other end of the sector gear 16 contacts and cooperates with the micro switch 23. When the timing spring assembly E rotates to a certain position, the micro switch 23 is closed, and the circuit signal is output to start the explosion device to realize the separation of the person and the chair and the umbrella shooting function.

[0046] In implementation case 1, when the device of the present invention is working in a low-altitude area, it only plays an emergency separation role when the seat electronic program controller fails.

[0047] Step 1: First, set the unlocking height value by adjusting the screw 22 (the height value is set above the required ejection height).

[0048] Step 2: Insert the starting pull pin 12 and secure it. The other end of the starting pull pin 12 is connected to the emergency handle.

[0049] Step 3: Push the locking lever 5 to lock the device.

[0050] Step 4: After the seat ejects, start the emergency handle in the working area, pull off the device start switch D, and the device starts to work.

[0051] Step 5: The timing spring assembly E pushes the transmission gear combination 18 and the balance swing piece 15 to move through the sector gear 16, delays for the set time, and the sector gear 16 triggers the micro switch 23.

[0052] Step 6: The micro switch 23 is turned on to output the ignition signal, and the firing mechanism works to complete the separation of the person and the seat and the parachute ejection work.

[0053] Embodiment 2. When the present invention works in high altitude areas, it can not only meet the emergency separation function but also realize the high altitude manual separation function.

[0054] Step 1: First, set the manual unlocking height value (the height setting value is higher than the maximum height value of the program controller) through the adjusting screw 22.

[0055] Step 2: Insert the starting pull pin 12 and secure it. The other end of the starting pull pin 12 is connected to the emergency handle.

[0056] Step 3: Push the locking lever 5 to lock the device.

[0057] Step 4: After the seat ejects, start the emergency handle in the high altitude area, pull off the device start switch D, and the device starts to work.

[0058] Step 5: The timing spring assembly E pushes the transmission gear combination 18 and the balance swing piece 15 to move through the sector gear 16 until the locking lever 9 is locked by the brake lever 10, and the device temporarily stops moving.

[0059] Step 6: When the seat descends to the set height value, the bellows assembly 24 contracts under the air pressure, and the brake lever 10 releases the restriction on the locking lever 9, and the device continues to move.

[0060] Step 7: After the remaining delay time has elapsed, the sector gear 16 triggers the micro switch 23, outputs the ignition signal, and the firing mechanism works to complete the separation of the person and the seat and the parachute ejection work.

[0061] Those skilled in the art can understand that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as the general understanding of those of ordinary skill in the art to which the present invention pertains. It should also be understood that terms such as those defined in a general dictionary should be understood to have a meaning consistent with their meaning in the context of the prior art, and will not be interpreted in an idealized or overly formal sense unless defined as such herein. The specific embodiments described above have further elaborated on the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above is only the specific embodiment of the present invention and is not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An electromechanical integrated height-time control emergency separation device, characterized in that, It includes a timing spring assembly A, a locking lever assembly B, a height control assembly C, a start switch assembly D and a timing gear assembly E; The timing spring assembly A includes a timing spring, which is fastened to an adjusting nut. The adjusting nut is an external hexagonal nut, which fits with a hexagonal hole at a corresponding position of the housing and can slide in the hexagonal hole but cannot rotate. The adjusting screw passes through the housing and is connected to the adjusting nut through threads, and the tension of the timing spring is adjusted by rotating the adjusting screw; The locking lever assembly B includes a locking lever, which is connected to the rotating shaft through a one-way bearing, the rotating shaft and the transmission rod are fastened through a special-shaped surface, the transmission rod and the steering connecting rod are connected through a pin and can rotate flexibly; the steering connecting rod is connected to the timing spring through a pin and can rotate flexibly; the locking lever is connected to the locking lever through the rotating shaft; the fan gear is connected to the locking lever through the rotating shaft; by toggling the locking lever, the timing spring is stretched to generate elastic potential energy, and at the same time, the locking lever and the fan gear are driven to rotate to the starting position; The height control assembly C includes a bellows assembly, which is tightly connected to the brake rod, and the bellows assembly is connected to the height dial, the height dial has a gear structure, which meshes with the adjustment gear, and the adjustment gear is tightly connected to the adjustment screw, which is installed on the housing, and a height observation window is installed on the housing to observe the set position of the height; when realizing height control, the bellows assembly is rotated by rotating the adjustment screw to control the extension length of the brake rod to limit the rotation of the locking lever, thereby controlling the movement of the mechanism; The start switch assembly D includes a locking claw, which is connected to the transmission connecting rod, a return spring installed on the transmission connecting rod and pressed against the housing, and a start pull pin installed on the housing and connected to the transmission connecting rod through an inclined surface; after the start pull pin is pulled out, the return spring pulls the locking claw to rotate under the action of elastic force, and releases the locking lever to start the emergency separation device; The timing gear assembly E includes a sector gear, which is meshed with a transmission gear combination through gears, and the ratchet in the transmission gear combination cooperates with the balance pendulum; the timing spring pushes the transmission gear combination to move through the sector gear, and drives the balance pendulum to rotate periodically to achieve the delay function; the other end of the sector gear contacts the micro switch to control the on and off of the circuit.

2. The electro-mechanical integrated height-time control emergency separation device according to claim 1, characterized in that, The contact surface between the adjusting screw and the housing is engraved with patterns.

3. An electromechanical integrated height-time control emergency separation device according to claim 1, characterized in that, The timing spring is composed of double-layer helical springs connected in parallel.

4. An electromechanical integrated height-time control emergency separation device according to claim 1, characterized in that, The locking lever is made of stainless steel and its hardness is increased to HRC62-68 through heat treatment. At the same time, the edge of the contact point with the brake lever is rounded to R0.

2.

5. An electromechanical integrated height-time control emergency separation device according to claim 1, characterized in that, The brake lever is made of stainless steel and its hardness is increased to HRC52-58 through heat treatment, and the end face is rounded to R0.

2.

6. An electromechanical integrated height-time control emergency separation device according to claim 1, characterized in that, The roughness of the relative motion surface between the locking lever and the brake rod is no more than Ra0.2, ensuring flexible relative motion; the roughness of the relative motion surface between the locking lever and the locking claw is no more than Ra0.

2.

7. An electromechanical integrated height-time control emergency separation device according to claim 1, characterized in that, The bellows assembly is composed of multiple layers of diaphragms; the end face of the start pin is an inclined surface, and the roughness of the surface of the start pin and the transmission connecting rod that have relative motion is not greater than Ra0.2; an anti-loosening insurance is also provided on the start pin; two or three micro switches are installed in parallel.

8. An electromechanical integrated height-time control emergency separation method, characterized in that, To implement the emergency separation device described in claim 1, the following steps are included: Step 1: The emergency handle is activated to pull off the starting pull pin connected to the emergency handle; Step 2: The locking claw releases the locking lever, and the timing spring drives the transmission gear combination to rotate to start the delay operation; Step 3: When the locking lever rotates to the position where it contacts the brake lever, the altitude at which the emergency separation device is located is judged: If the altitude is higher than the set altitude of the emergency separation device, the brake lever locks the locking lever, and the transmission gear combination stops rotating until the emergency separation device descends to the set altitude, and the brake lever contracts to release the locking lever, and the mechanism continues to move; If the altitude is lower than the set altitude of the emergency separation device, the brake lever cannot lock the locking lever, and the transmission gear assembly continues to move; Step 4: The timing spring drives the sector gear to rotate until it presses the micro switch to close, outputs an ignition signal, and the mechanism moves until the locking lever is blocked by the stop pin to complete the operation.

9. An electro-mechanical integrated height-time control emergency separation method according to claim 8, characterized in that, The delay time and the accuracy of adjusting the delay time can be adjusted by the adjusting screw.

10. A mechanical and electrical integrated height-time control emergency separation method according to claim 8, characterized in that, The remaining delay time after adjusting the set altitude can be adjusted by the position of the locking lever.

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