Actuating cylinder for cabin door unfolding and pneumatic driving unfolding device

Abstract

The invention relates to an actuator cylinder for cabin door unfolding and a pneumatic drive unfolding device. The actuating cylinder comprises an outer cylinder, an end cover and an outer cylinder threaded end cover are arranged at the two ends of the outer cylinder respectively, an inner cylinder is arranged in the outer cylinder, a piston rod is arranged in the inner cylinder, the inner cylinder is slidably connected with the piston rod through a head assembly, and the other end of the inner cylinder is connected with a piston lug. An air injection hole is formed in the end cover, a first air cavity is formed between the end cover and the inner cylinder head assembly, one end of the piston rod is connected with an inner cylinder threaded end cover, and the interior of the inner cylinder is divided into a first oil cavity and a second oil cavity through a piston head at the other end of the piston rod. A second air cavity is formed among the outer cylinder threaded end cover, the outer cylinder and the inner cylinder, and a floating piston is arranged between a piston head of the piston rod and a piston lug. According to the invention, the cabin door, the undercarriage and the like can be effectively driven.

Description

Technical Field

[0001] The invention belongs to the field of hatch door driving, and in particular relates to an actuator cylinder and a pneumatically driven unfolding device for unfolding a hatch door. Background Art

[0002] In recent years, with the rapid development of aircraft, spacecraft and other means of transportation, their use has become more and more extensive. As an important functional structural part in aircraft and spacecraft, the drive deployment device is mainly responsible for opening and closing the doors, landing gear, etc. At present, electric transmission devices are usually used to provide power. With the development and progress of technology, pneumatic drive deployment devices have also received certain attention.

[0003] Since the motor-driven deployment device has high requirements on the motor, is heavy, and has a slow retraction and deployment time, it is not suitable for aircraft that land at high speed and have requirements on the door and landing gear lowering time and flight weight. The current pneumatic-driven deployment device uses high-pressure gas, which has a large motion impact when it is used, and cannot feedback the arrival signal after it is deployed. Summary of the invention

[0004] The purpose of the present invention is to provide an actuator and a pneumatically driven deployment device for hatch door deployment, so as to solve the problems of large movement impact when the current pneumatically driven deployment device is in action and the inability to feedback the arrival signal after deployment, so as to realize the effective driving of hatch doors, landing gear, etc.

[0005] The technical solution to achieve the purpose of the present invention is: an actuator cylinder for hatch door deployment, comprising an outer cylinder, end covers and outer cylinder threaded end covers are respectively provided at both ends of the outer cylinder, an inner cylinder is provided inside the outer cylinder, a piston rod is provided inside the inner cylinder, the inner cylinder is slidably connected to the piston rod through a head assembly, a piston ear is connected to the other end of the inner cylinder, the center of the end cover is connected to one end of the piston rod through a threaded hole, an air injection hole is provided on the end cover, a first air cavity is formed between the end cover and the inner cylinder head assembly, one end of the piston rod is connected to the inner cylinder threaded end cover, and the interior of the inner cylinder is divided into a first oil cavity and a second oil cavity through the piston head at the other end, a boss is provided on one side of the outer cylinder threaded end cover, and a signal feedback system is installed through the boss, an air injection hole is provided on the other side, a second air cavity is formed between the outer cylinder threaded end cover, the outer cylinder and the inner cylinder, and a floating piston is provided between the piston head and the piston ear of the piston rod;

[0006] The head assembly includes a steel ball, which is used to lock the position of the inner cylinder relative to the outer cylinder, and to feedback signals of the actuator cylinder being deployed and locked and unlocked through a signal feedback system.

[0007] Furthermore, the end cover is connected to the hatch, a mounting hole for installing the spherical bearing is opened on the top of the end cover, the end cover is connected to the outer tube through a thread, and a boss with a threaded through hole is opened on one side of the end cover for installing the unfolding air guide bolt.

[0008] Furthermore, the inner cylinder threaded end cap is provided with a cylinder sleeved outside the piston rod, and the head assembly includes an unlocking sleeve, a limiting snap ring, a locking snap ring, a compression spring, a steel ball and a sliding sleeve;

[0009] The unlocking sleeve is arranged on the outer circumference of the piston rod cylinder, and a locking clasp is arranged outside the unlocking sleeve and inside the sliding sleeve. The unlocking sleeve is connected to a limit clasp by a thread at one end of the threaded end cover of the inner cylinder to limit the displacement of the locking clasp during the locking process; the compression spring is arranged between the sliding sleeve and the locking clasp to provide thrust for the locking clasp when the locking is unfolded; six through holes are opened in the circumference of the sliding sleeve to place steel balls, and a ramp structure is arranged at the tail of the sliding sleeve to push the signal feedback system after the actuator is unfolded into place;

[0010] An arc-shaped groove is arranged at the position where the outer cylinder matches the steel ball; after the actuator cylinder is unfolded into place, the steel ball will be pushed into the groove on the outer cylinder by the locking clamp ring to lock the actuator cylinder.

[0011] Furthermore, a boss is provided on one side of the threaded end cover of the outer cylinder for installing a signal feedback system, and an air injection hole is provided on the other side for installing and retracting the air guide bolt; an arc-shaped groove is provided at the end of the threaded end cover of the outer cylinder for locking the steel ball in the groove after the actuator is deployed into place.

[0012] Furthermore, the piston head of the piston rod is detachably connected to the adjustable flow hole, and the oil flow rate can be controlled by replacing the adjustable flow holes of different specifications, thereby adjusting the size of the oil buffer force;

[0013] The first oil chamber is the storage area for the buffer oil before the actuator is deployed. When deployed, the buffer oil flows from the first oil chamber through the adjustable flow hole on the piston rod into the second oil chamber. When retracted, the buffer oil flows from the second oil chamber through the adjustable flow hole on the piston rod into the first oil chamber.

[0014] Furthermore, the inner tube and the piston ear are fastened by a set screw, and the end cover plane and the piston ear plane are kept in the same plane by adjusting the position of the set screw; the piston ear is connected to the tail of the inner tube by a thread, and a mounting hole for mounting a spherical bearing is opened on the top.

[0015] Furthermore, the floating piston is composed of a floating piston body and a floating piston plug. The floating piston is installed between the cavity between the piston rod piston head and the piston ear to prevent oil leakage. A hole is punched in the middle of the floating piston body (1009-1). After the floating piston body is installed, it is sealed with a floating piston plug.

[0016] Further, the signal feedback system includes a trigger head, a trigger spring, a spring pressure piece, a spring stopper, a protection box and a micro switch;

[0017] The trigger head is installed in the concave hole of the threaded end cover of the outer cylinder. When the sliding sleeve moves to the near end, the ramp structure at the end of the sliding sleeve pushes the trigger head to move downward; the trigger spring provides support force for the trigger head before the actuator is unfolded and locked, and provides rebound force for the trigger head to restore the trigger head to its original state after it is retracted and unlocked; the spring pressure piece is located below the trigger head, and the spring pressure piece will be pressed down when the trigger head is pushed downward, and it is fixed to the micro switch by screws; the spring baffle is installed in the concave hole of the threaded end cover of the outer cylinder through threads to support the trigger spring; the protective box is installed on the boss on one side of the threaded end cover of the outer cylinder to package the entire signal feedback system and fix the micro switch to prevent damage to the signal feedback system; the micro switch is a signal output mechanism. When the trigger head presses down the spring pressure piece, the spring pressure piece triggers the micro switch, and its output is unfolded and locked in place signal. When the trigger head rebounds to release the downward pressure on the spring pressure piece, the micro switch outputs an unlocking signal.

[0018] A pneumatically driven deployment device for hatch door deployment, comprising the above-mentioned actuator, and also comprising a gas cylinder, an adapter, a master control solenoid valve, a master gas pipeline, a retraction control solenoid valve, a retraction pipeline, a deployment control solenoid valve, a deployment pipeline, a deployment air guide bolt, and a retraction air guide bolt;

[0019] The gas cylinder is the power source of the deployment device, and the adapter is the adapter between the gas cylinder port and the main control solenoid valve; the main control solenoid valve controls the switch of the main gas pipeline; the main gas pipeline is the gas hose connected between the main control solenoid valve and the adapter; the retraction control solenoid valve serves as the gas supply switch for controlling the retraction pipeline, and is opened when the actuator needs to be retracted; the retraction pipeline is the gas hose connected between the retraction control solenoid valve and the retraction air guide bolt; the deployment control solenoid valve serves as the gas supply switch for controlling the deployment pipeline, and is opened when the actuator needs to be deployed; the deployment pipeline is the gas hose connected between the deployment control solenoid valve and the deployment air guide bolt; the deployment air guide bolt is the transfer air guide mechanism between the deployment pipeline and the actuator; the actuator is the actuator that drives the deployment device, and is deployed after air intake to achieve the deployment of the cabin door; the retraction air guide bolt is the transfer air guide mechanism between the retraction pipeline and the actuator.

[0020] A method for driving a hatch door to unfold using the pneumatically driven unfolding device is as follows:

[0021] After the system issues a deployment command, the master control solenoid valve and the deployment control solenoid valve are opened, and the high-pressure gas in the gas cylinder enters the first air chamber in the actuator cylinder through the master control solenoid valve, the main gas pipeline, the deployment control solenoid valve, the deployment pipeline and the deployment gas guide bolt in turn; then the high-pressure gas pushes the head assembly to drive the inner cylinder to move to achieve deployment. When the inner cylinder moves, the piston rod moves in the opposite direction. At this time, the oil in the first oil chamber flows to the second oil chamber through the oil hole and the adjustable flow hole at the end of the piston rod, thereby providing oil buffering force for the deployment process; when the end of the sliding sleeve hits the end of the threaded end cover of the outer cylinder, the limit of the inner wall of the outer cylinder on the steel ball is eliminated, and the steel ball The locking ring is pressed against the outer sleeve and the locking ring is pressed against the outer sleeve, and the locking ring is pressed against the outer sleeve, and the locking ring is pressed against the outer sleeve, and the locking ring is pressed against the outer sleeve.

[0022] When the system issues a retraction command, the retraction control solenoid valve opens, and the high-pressure gas in the gas cylinder enters the second air chamber in the actuator cylinder through the main control solenoid valve, the main gas pipeline, the retraction control solenoid valve, the retraction pipeline and the retraction gas guide bolt in turn; the high-pressure gas enters the interior through the slope structure of the sliding sleeve and the air vents on the side wall, pushing the unlocking sleeve to drive the limit clamping ring to move, and the limit clamping ring touches the locking clamping ring and pushes the locking clamping ring to squeeze the compression spring. The compression spring is compressed, and the locking clamping ring moves to release the limit on the steel ball, and the steel ball is released from the threaded end of the outer cylinder. The cover falls off from the groove to realize unlocking, and the high-pressure gas continues to push the sliding sleeve to move; the limiting effect of the sliding sleeve on the trigger head is released, and the trigger head is reset under the action of the trigger spring, the spring pressure piece rebounds, and the micro switch outputs an unlocking success signal. After a predetermined delay, the control solenoid valve and the main control solenoid valve are retracted and closed, and the gas cylinder stops supplying gas to realize the retraction of the drive deployment device; in addition, during retraction, the buffer oil flows from the second oil chamber through the adjustable flow hole and the oil hole at the end of the piston rod to the first oil chamber, thereby providing oil buffer force for the retraction process.

[0023] Compared with the prior art, the present invention has the following significant advantages:

[0024] The gas drive + oil buffer method is adopted, which is not prone to oil leakage problems. At the same time, it can effectively reduce the high impact caused by gas drive. At the same time, the oil buffer force can be controlled by replacing adjustable flow holes of different specifications. In addition, the intake pressure can be adjusted to meet different deployment speed requirements;

[0025] A signal feedback system has been added to enable the drive device to provide signal feedback immediately after it is deployed and locked in place, and after it is retracted and unlocked, thus increasing reliability.

[0026] Through the unlocking design, after the driving deployment device is deployed and locked in place, the retraction solenoid valve can be controlled to supply air to the retraction pipeline, so that the device can be unlocked again, thereby realizing the quick and convenient reuse of the driving deployment device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is the overall diagram of the drive deployment device;

[0028] Figure 2 This is the structural diagram of the actuator;

[0029] Figure 3 It is composed of a floating piston structure;

[0030] Figure 4 It is composed of the structure of the signal feedback system;

[0031] Figure 5 Locking process for the ball lock;

[0032] Figure 6 Unlocking process of the steel ball lock;

[0033] Figure 7 is the buffer flow direction during the development phase;

[0034] Figure 8 Buffer flow direction during the recovery phase.

[0035] Description of reference numerals:

[0036] 1-gas cylinder, 2-adapter, 3-master control solenoid valve, 4-master gas pipeline, 5-retract control solenoid valve, 6-retract pipeline, 7-control solenoid valve, 8-expand pipeline, 9-expand gas guide bolt, 10-actuator, 1001-end cover, 1002-sealing ring, 1003-steel ball, 1004-sliding sleeve, 1005-first oil chamber, 1006-outer cylinder, 1007-threaded end cover of outer cylinder, 1008-adjustable flow hole, 1009-floating piston, 1010-tightening adjustment screw, 1011-piston ear, 101 2-second oil chamber, 1013-signal feedback system, 1014-piston rod, 1015-inner cylinder, 1016-threaded end cover of inner cylinder, 1017-limiting snap ring, 1018-locking snap ring, 1019-compression spring, 1020-unlocking sleeve, 1021-first air chamber, 1022-spherical bearing, 1023-second air chamber, 1013-1-trigger head, 1013-2-trigger spring, 1013-3-spring pressure plate, 1013-4-spring baffle, 1013-5-protection box, 1013-6-micro switch. DETAILED DESCRIPTION

[0037] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0038] like Figure 1-8 As shown, a pneumatically driven deployment device for hatch door deployment. The device is used for hatch door deployment drive, and includes a gas cylinder 1, an adapter 2, a master control solenoid valve 3, a master gas pipeline 4, a retraction control solenoid valve 5, a retraction pipeline 6, a deployment control solenoid valve 7, a deployment pipeline 8, a deployment air guide bolt 9, an actuator 10, and a retraction air guide bolt 11.

[0039] The gas cylinder 1 is the power source of the deployment device, and a standard shelf product is selected; the adapter 2 is an adapter between the gas cylinder 1 and the master control solenoid valve 3 to adapt to the interface between the gas cylinder 1 and the master control solenoid valve 3; the master control solenoid valve 3 can control the switch of the main gas pipeline 4 to control the gas outlet of the gas cylinder 1; the main gas pipeline 4 is a gas supply hose connected between the master control solenoid valve 3 and the adapter 2, which is used for gas supply; the retraction control solenoid valve 5 is used as the gas supply switch to control the retraction pipeline 6, and is opened when the actuator 10 needs to be retracted; the retraction pipeline 6 is the retraction control solenoid valve 5 and Retract the air hose connected between the air guide bolts 11; the deployment control solenoid valve 7 serves as the air supply switch for controlling the deployment pipeline 8, and is opened when the actuator 10 needs to be deployed; the deployment pipeline 8 is the air hose connected between the deployment control solenoid valve 7 and the deployment air guide bolts 9; the deployment air guide bolts 9 are the switching air guide mechanism between the deployment pipeline 8 and the actuator 10; the actuator 10 is the actuator that drives the deployment device, and is deployed after air intake to achieve the deployment of the cabin door; the retracting air guide bolts 11 are the switching air guide mechanism between the retracting pipeline 6 and the actuator 10.

[0040] The actuator 10 is composed of an end cover 1001, a sealing ring 1002, a steel ball 1003, a sliding sleeve 1004, a first oil chamber 1005, an outer cylinder 1006, an outer cylinder threaded end cover 1007, an adjustable flow hole 1008, a floating piston 1009, a tightening adjustment screw 1010, a piston ear 1011, a second oil chamber 1012, a signal feedback system 1013, a piston rod 1014, an inner cylinder 1015, an inner cylinder threaded end cover 1016, a limit snap ring 1017, a locking snap ring 1018, a compression spring 1019, an unlocking sleeve 1020, a first air chamber 1021 and a spherical bearing 1022. The end cover 1001 is connected to the hatch. A mounting hole for mounting the spherical bearing 1022 is provided on the top of the end cover 1001. The end cover 1001 is connected to the outer cylinder 1006 through a thread. A boss with a threaded through hole is provided on one side of the end cover 1001 for mounting the unfolding air guide bolt 9. A threaded hole is also provided in the center of the end cover 1001 for mounting the piston rod 1014. The sealing ring 1002 plays a sealing role to prevent the gas and oil in the actuator 10 from leaking. After the actuator 10 is deployed, the steel ball 1003 will be pushed into the groove on the outer cylinder 1006 by the locking ring 1018 to lock the actuator 10. There are six steel balls 1003 in total. The sliding sleeve 1004 has six through holes in the circumference for placing the steel balls 1003. The diameter of the holes is slightly larger than that of the steel balls 1003, so that when the arc groove on the outer cylinder 1006 is located above the steel balls 1003, the steel balls 1003 can be pushed into the groove smoothly. The tail of the sliding sleeve 1004 is chamfered to push the signal feedback system 1013 after the actuator 10 is deployed. The diameter of the sliding sleeve 1004 is slightly smaller near the chamfered end, and a vent hole is opened on the side wall, so that gas can enter the interior when the actuator 10 is retracted, pushing the limit clamp 1017 to unlock; the first oil chamber 1005 is a storage area for the buffer oil before the actuator (10) is deployed. When deployed, the buffer oil flows from the first oil chamber 1005 to the second oil chamber 1012 through the adjustable flow hole 1008 on the piston rod 1014, and when retracted, the second oil chamber 1012 flows into the first oil chamber 1005 through the adjustable flow hole 1008 on the piston rod 1014; the outer surface of the outer cylinder 1006 is provided with threads at both ends to connect the end cover 1001 and the outer cylinder threaded end cover 1007; a boss is provided on one side of the outer cylinder threaded end cover 1007 to install the signal feedback system 1013, and an air injection hole is opened on the other side to install the retracting air guide bolt 11. An arc-shaped groove is formed at the end of the outer cylinder threaded end cap 1007 to lock the steel ball 1003 in the groove after the actuator 10 is deployed in place; the adjustable flow hole 1008 is installed at the tail of the piston rod 1014, and the oil flow rate can be controlled by replacing the adjustable flow holes 1008 of different specifications, thereby adjusting the size of the oil buffer force;The floating piston 1009 consists of a floating piston body 1009-1 and a floating piston plug 1009-2, which is installed between the cavity between the tail of the piston rod 1014 and the piston ear 1011 to prevent oil leakage. Considering that the cavity is full of oil and air when the floating piston 1009 is installed, the floating piston 1009 is not easy to install. Therefore, a hole is punched in the middle of the floating piston body 1009-1. After the floating piston body 1009-1 is installed, it is sealed with the floating piston plug 1009-2; the tightening adjustment screw 1010 is used to tighten the inner cylinder 1015 and the piston ear 1011. At the same time, due to the uncertainty of the threaded connection, the end can be adjusted by adjusting the tightening position of the tightening adjustment screw 1010 The plane of the cover 1001 and the plane of the piston ear 1011 are kept in the same plane; the piston ear 1011 is connected to the tail of the inner tube 1015 by threads, and a mounting hole for mounting the spherical bearing 1022 is opened on the top; the second oil chamber 1012 is the tail cavity of the floating piston 1009 and the piston rod 1014; the signal feedback system 1013 is used to feedback the signal after the actuator 10 is deployed and locked in place and after the actuator 10 is unlocked; the piston rod 1014 is connected to the end cover 1001 by threads, and a threaded hole is opened at the tail of the piston rod 1014 for mounting the adjustable flow hole 1008, and an oil hole is opened to buffer the flow of oil; two through holes are opened at the tail of the inner tube 1015 for mounting the tightening adjustment screw 101 0, the inner cylinder 1015 is connected to the inner cylinder threaded end cover 1016 through a thread; the inner cylinder threaded end cover 1016 is installed at the left end of the inner cylinder 1015 through a thread to achieve the sealing of the oil in the inner cylinder 1015; the limiting snap ring 1017 is installed at the right end of the unlocking sleeve 1020 through a thread to limit the displacement of the locking snap ring 1018 during the locking process; the locking snap ring 1018 is installed inside the sliding sleeve 1004, and the locking snap ring 1018 presses the steel ball 1003 into the through hole of the sliding sleeve 1004, and the steel ball 1003 also limits the displacement of the locking snap ring 1018. When the steel ball 1003 falls into the groove, the limiting effect of the steel ball 1003 on the locking snap ring 1018 is released, and the locking snap ring 1018 is Under the action of the spring, it moves to the right, pressing the steel ball 1003 into the groove; the compression spring 1019 is between the sliding sleeve 1004 and the locking snap ring 1018, and is used to provide thrust for the locking snap ring 1018 when the locking is unfolded; the unlocking sleeve 1020 is used to provide support for the sliding sleeve 1004, the compression spring 1019 and other structures, and drives the locking snap ring 1018 to squeeze the compression spring 1019 when the actuator 10 is retracted and unlocked, so as to achieve unlocking; the air cavity 1021 is a chamber for storing the gas delivered during the unfolding and retracting process; the spherical bearing 1022 is installed on the end cover 1001 and the piston ear 1011, which can withstand a large load and can still work normally when the non-concentricity between the support shaft and the shaft housing hole is large. ;

[0041] The signal feedback system 1013 is composed of a trigger head 1013-1, a trigger spring 1013-2, a spring pressure plate 1013-3, a spring baffle 1013-4, a protective box 1013-5 and a micro switch 1013-6. The trigger head (1013-1) is installed in the concave hole of the outer tube threaded end cover 1007. When the sliding sleeve 1004 moves quickly to the end, the slope structure at the end of the sliding sleeve 1004 will push the trigger head 1013-1 to move downward; the trigger spring 1013-2 provides support force for the trigger head 1013-1 before the actuator 10 is unfolded and locked, and provides rebound force for the trigger head 1013-1 after it is retracted and unlocked to restore the trigger head 1013-1 to its original state; the spring pressure plate 1013-3 is located below the trigger head 1013-1, and the trigger head 1013-1 will press down when it is pushed downward. The spring pressing piece 1013-3 is fixed on the micro switch 1013-6 by screws; the spring baffle 1013-4 is installed in the concave hole of the outer tube threaded end cover 1007 by threads to support the trigger spring 1013-2; the protection box 1013-5 is installed on the boss on one side of the outer tube threaded end cover 1007, which packages the entire signal feedback system 1013 and fixes the micro switch 1013-6 to prevent the signal feedback system 1013 from being damaged; the micro switch 1013-6 is a signal output mechanism. When the trigger head 1013-1 presses down the spring pressing piece 1013-3, the spring pressing piece 1013-3 triggers the micro switch 1013-6, which outputs an expansion and locking signal. When the trigger head 1013-1 rebounds to release the downward pressure on the spring pressing piece 1013-3, the micro switch 1013-6 outputs an unlocking signal.

[0042] After the system issues a deployment command, the master control solenoid valve 3 and the deployment control solenoid valve 7 are opened, and the high-pressure gas in the gas cylinder 1 enters the first air chamber 1021 in the actuator 10 through the master control solenoid valve 3, the main gas pipeline 4, the deployment control solenoid valve 7, the deployment pipeline 8 and the deployment gas guide bolt 9 in sequence. Afterwards, the high-pressure gas pushes the sliding sleeve 1004 to drive the inner cylinder 1015 to move to the right to achieve deployment. When the inner cylinder 1015 moves to the right, the piston rod 1014 moves relatively to the left. At this time, the oil in the first oil chamber 1005 flows to the second oil chamber 1012 through the oil hole at the end of the piston rod 1014 and the adjustable flow hole 1008, thereby providing oil buffering force for the deployment process; when the end of the sliding sleeve 1004 hits the end of the outer cylinder threaded end cover 1007, the limit of the steel ball 1003 by the inner wall of the outer cylinder 1006 is eliminated, and the steel ball 1003 falls into the arc-shaped groove on the inner wall of the outer cylinder threaded end cover 1007 under the thrust of the locking snap ring 1018, and at the same time, the limit effect of the steel ball 1003 on the locking snap ring 1018 is released , the locking ring 1018 moves to the right under the action of the compression spring 1019, thereby further pressing the steel ball 1003 in the arc-shaped groove, so that the relative positions of the inner cylinder 1015 and the sliding sleeve 1004 and the outer cylinder 1006 and the outer cylinder threaded end cover 1007 are locked, thereby realizing the deployment lock; in addition, when the sliding sleeve 1004 quickly moves to the end of the outer cylinder threaded end cover 1007, the slope structure at the end of the sliding sleeve 1004 will push the trigger head 1013-1 to move downward, thereby pressing down the spring pressing plate 1013-3, and triggering the micro switch 1013-6 through the spring pressing plate 1013-3, and the micro switch 1013-6 feeds back to the overall signal. At this time, the deployment control solenoid valve 7 is powered off and closed, and the gas cylinder 1 stops supplying gas.

[0043] When the system issues a retraction command, the retraction control solenoid valve 5 opens, and the high-pressure gas in the gas cylinder 1 passes through the master control solenoid valve 3, the master gas pipeline 4, the retraction control solenoid valve 5, the retraction pipeline 6 and the retraction gas guide bolt 11 in sequence into the second air cavity 1023 in the actuator 10. After the high-pressure gas enters the actuator 10, the gas flows to the following direction: Figure 6As shown, since the diameter of the sliding sleeve 1004 is slightly smaller near the chamfered end and a vent is opened on the side wall, high-pressure gas can enter the interior through this hole, pushing the unlocking sleeve 1020 to drive the limiting snap ring 1017 to move to the left. After the limiting snap ring 1017 touches the locking snap ring 1018, it pushes the locking snap ring 1018 to squeeze the compression spring 1019. The compression spring 1019 is compressed, and the locking snap ring 1018 moves to the left to release the limit on the steel ball 1003. The steel ball 1003 falls off from the groove of the outer tube threaded end cover 1007 to achieve unlocking, and the high-pressure gas continues to push the sliding sleeve 1004 to move to the left. The limiting effect of the sliding sleeve 1004 on the trigger head 1013-1 is released, the trigger head 1013-1 is reset under the action of the trigger spring 1013-2, the spring pressure plate 1013-3 rebounds, the micro switch 1013-6 outputs a successful unlocking signal, and after a predetermined delay, the retraction control solenoid valve 5 and the master control solenoid valve 3 are closed, the gas cylinder 1 stops supplying gas, and the drive deployment device is retracted. In addition, during retraction, the buffer oil flows from the second oil chamber 1012 through the adjustable flow hole 1008 and the oil hole at the end of the piston rod 1014 to the first oil chamber 1005, providing oil buffer force for the retraction process.

[0044] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An actuator for door deployment, characterized in that: The invention comprises an outer cylinder (1006), and end caps (1001) and outer cylinder threaded end caps (1007) are respectively arranged at two ends of the outer cylinder (1006), an inner cylinder (1015) is arranged inside the outer cylinder (1006), a piston rod (1014) is arranged inside the inner cylinder (1015), the inner cylinder (1015) is slidably connected to the piston rod (1014) through a head assembly, a piston ear piece (1011) is connected to the other end of the inner cylinder (1015), the center of the end cap (1001) is connected to one end of the piston rod (1014) through a threaded hole, an air injection hole is provided on the end cap (1001), and a gas injection hole is formed between the end cap (1001) and the head assembly of the inner cylinder (1015). A first air cavity (1021), one end of the piston rod (1014) is connected to an inner cylinder threaded end cap (1016), and the inner cylinder is divided into a first oil cavity (1005) and a second oil cavity (1012) through a piston head at the other end; a boss is provided on one side of the outer cylinder threaded end cap (1007) and a signal feedback system (1013) is installed through the boss; an air injection hole is provided on the other side; a second air cavity (1023) is formed between the outer cylinder threaded end cap (1007), the outer cylinder (1006) and the inner cylinder (1015); a floating piston (1009) is provided between the piston head of the piston rod (1014) and the piston ear (1011); The head assembly includes a steel ball (1003), and the steel ball (1003) is used to lock the position of the inner cylinder (1015) relative to the outer cylinder (1006), and the signal feedback system (1013) is used to feedback the signal after the actuator cylinder (10) is deployed and locked in place and the signal after the actuator cylinder (10) is unlocked.

2. The actuator according to claim 1, characterized in that: The end cover (1001) is connected to the hatch, and a mounting hole for mounting the spherical bearing (1022) is provided on the top of the end cover (1001). The end cover (1001) is connected to the outer cylinder (1006) through a thread, and a boss with a threaded through hole is provided on one side of the end cover (1001) for mounting the unfolding air guide bolt (9).

3. The actuator according to claim 2, characterized in that: The inner cylinder threaded end cap (1016) is provided with a cylinder sleeved outside the piston rod (1014), and the head assembly comprises an unlocking sleeve (1020), a limiting snap ring (1017), a locking snap ring (1018), a compression spring (1019), a steel ball (1003) and a sliding sleeve (1004); The unlocking sleeve (1020) is arranged on the outer circumference of the piston rod cylinder, and a locking snap ring (1018) is arranged outside the unlocking sleeve (1020) and inside the sliding sleeve (1004). A limiting snap ring (1017) is threadedly connected to the outer end of the unlocking sleeve (1020) close to the inner cylinder threaded end cover (1016) to limit the displacement of the locking snap ring (1018) during the locking process; a compression spring (1019) is arranged between the sliding sleeve (1004) and the locking snap ring (1018) to provide thrust for the locking snap ring (1018) when the locking is unfolded; six through holes are opened in the circumference of the sliding sleeve (1004) to place the steel ball (1003), and a ramp structure is arranged at the tail of the sliding sleeve (1004) to push the signal feedback system (1013) after the actuator (10) is unfolded into place; An arc-shaped groove is provided at the position where the outer cylinder (1006) matches the steel ball (1003); after the actuating cylinder (10) is unfolded into place, the steel ball (1003) will be pushed into the groove on the outer cylinder (1006) by the locking clamp ring (1018) to lock the actuating cylinder (10).

4. The actuator according to claim 3, characterized in that: A boss is provided on one side of the outer cylinder threaded end cover (1007) for installing the signal feedback system (1013), and an air injection hole is provided on the other side for installing the retracting air guide bolt (11); an arc-shaped groove is provided at the end of the outer cylinder threaded end cover (1007) for locking the steel ball (1003) in the groove after the actuator (10) is deployed into place.

5. The actuator according to claim 4, characterized in that: The piston head of the piston rod (1014) is detachably connected to the adjustable flow hole (1008), and the oil flow rate can be controlled by replacing the adjustable flow holes (1008) of different specifications, thereby adjusting the size of the oil buffer force; The first oil chamber (1005) is a storage area for the buffer oil before the actuator (10) is deployed. When deployed, the buffer oil flows from the first oil chamber (1005) through the adjustable flow hole (1008) on the piston rod (1014) into the second oil chamber (1012). When retracted, the buffer oil flows from the second oil chamber (1012) through the adjustable flow hole (1008) on the piston rod (1014) into the first oil chamber (1005).

6. The actuator according to claim 5, characterized in that: The inner cylinder (1015) and the piston ear piece (1011) are fastened by a fastening adjustment screw (1010), and the plane of the end cover (1001) and the plane of the piston ear piece (1011) are kept in the same plane by adjusting the fastening position of the fastening adjustment screw (1010); the piston ear piece (1011) and the rear end of the inner cylinder (1015) are connected by threads, and a mounting hole for mounting a spherical bearing (1022) is opened on the top.

7. The actuator according to claim 6, characterized in that: The floating piston (1009) is composed of a floating piston body (1009-1) and a floating piston screw plug (1009-2). The floating piston (1009) is installed between the piston head of the piston rod (1014) and the cavity between the piston ear (1011) to prevent oil leakage. A hole is punched in the middle of the floating piston body (1009-1). After the floating piston body (1009-1) is installed, it is sealed with the floating piston screw plug (1009-2).

8. The actuator according to claim 7, characterized in that: The signal feedback system (1013) comprises a trigger head (1013-1), a trigger spring (1013-2), a spring pressing sheet (1013-3), a spring blocking plate (1013-4), a protection box (1013-5) and a micro switch (1013-6); The trigger head (1013-1) is installed in the concave hole of the outer cylinder threaded end cover (1007); when the sliding sleeve (1004) moves to the near end, the slope structure at the end of the sliding sleeve (1004) pushes the trigger head (1013-1) to move downward; the trigger spring (1013-2) provides support force for the trigger head (1013-1) before the actuator (10) is unfolded and locked, and provides rebound force for the trigger head (1013-1) to restore the trigger head (1013-1) to its original state after it is retracted and unlocked; the spring pressing plate (1013-3) is located below the trigger head (1013-1); when the trigger head (1013-1) is pushed downward, the spring pressing plate (1013-3) is pressed downward, and the spring pressing plate (1013-3) is fixed to the micro switch (1013-6) by screws; the spring stopper (1013- 4) is installed in the concave hole of the outer cylinder threaded end cover (1007) through a thread to support the trigger spring (1013-2); the protection box (1013-5) is installed on a boss on one side of the outer cylinder threaded end cover (1007) to package the entire signal feedback system (1013) and fix the micro switch (1013-6) to prevent the signal feedback system (1013) from being damaged; the micro switch (1013-6) is a signal output mechanism, when the trigger head (1013-1) presses down the spring pressing piece (1013-3), the spring pressing piece (1013-3) triggers the micro switch (1013-6), which outputs an expansion and locking signal, and when the trigger head (1013-1) rebounds to release the downward pressure on the spring pressing piece (1013-3), the micro switch (1013-6) outputs an unlocking signal.

9. A pneumatically driven deployment device for hatch door deployment, characterized in that: An actuator according to any one of claims 1 to 8, further comprising a gas cylinder (1), an adapter (2), a master control solenoid valve (3), a master gas pipeline (4), a retraction control solenoid valve (5), a retraction pipeline (6), an expansion control solenoid valve (7), an expansion pipeline (8), an expansion gas guide bolt (9) and a retraction gas guide bolt (11); The gas cylinder (1) is the power source of the deployment device, and the adapter (2) is the adapter between the gas cylinder (1) port and the master control solenoid valve (3); the master control solenoid valve (3) controls the switch of the master gas pipeline (4); the master gas pipeline (4) is the gas supply hose connected between the master control solenoid valve (3) and the adapter; the retraction control solenoid valve (5) serves as the gas supply switch for controlling the retraction pipeline (6), and is opened when the actuator (10) needs to be retracted; the retraction pipeline (6) is the gas supply hose connected between the retraction control solenoid valve (5) and the retraction air guide bolt (11); the deployment control The control solenoid valve (7) serves as an air supply switch for controlling the deployment pipeline (8), and is opened when the actuator (10) needs to be deployed; the deployment pipeline (8) is an air supply hose connected between the deployment control solenoid valve (7) and the deployment air guide bolt (9); the deployment air guide bolt (9) is a switching air guide mechanism between the deployment pipeline (8) and the actuator (10); the actuator (10) is an actuator for driving the deployment device, and is deployed after air intake to achieve the deployment of the cabin door; the retraction air guide bolt (11) is a switching air guide mechanism between the retraction pipeline (6) and the actuator (10).

10. A method for driving a hatch door to unfold using the pneumatically driven unfolding device according to claim 9, characterized in that: The details are as follows: After the system issues a deployment command, the master control solenoid valve (3) and the deployment control solenoid valve (7) are opened, and the high-pressure gas in the gas cylinder (1) enters the first air cavity (1021) in the actuator cylinder (10) through the master control solenoid valve (3), the main gas pipeline (4), the deployment control solenoid valve (7), the deployment pipeline (8) and the deployment gas guide bolt (9) in sequence; then the high-pressure gas pushes the head assembly to drive the inner cylinder (1015) to move to achieve deployment, and when the inner cylinder (1015) moves, the piston rod (1 014) moves in the opposite direction, at which time the oil in the first oil chamber (1005) flows to the second oil chamber (1012) through the oil hole and the adjustable flow hole (1008) at the end of the piston rod (1014), thereby providing oil buffering force for the deployment process; when the end of the sliding sleeve (1004) hits the end of the threaded end cover (1007) of the outer cylinder, the limit of the inner wall of the outer cylinder (1006) on the steel ball (1003) is eliminated, and the steel ball (1003) is locked in the locking ring (1018). The thrust falls into the arc-shaped groove on the inner wall of the outer cylinder threaded end cover (1007), and at the same time, the limiting effect of the steel ball (1003) on the locking snap ring (1018) is released, and the locking snap ring (1018) moves under the action of the compression spring (1019), thereby further pressing the steel ball (1003) in the arc-shaped groove, so that the relative positions of the inner cylinder (1015) and the sliding sleeve (1004) and the outer cylinder (1006) and the outer cylinder threaded end cover (1007) are locked, thereby realizing the deployment lock. In addition, when the sliding sleeve (1004) moves to the end of the outer tube threaded end cap (1007), the slope structure at the end of the sliding sleeve (1004) pushes the trigger head (1013-1) to move downward, thereby pressing the spring pressing plate (1013-3), triggering the micro switch (1013-6) through the spring pressing plate (1013-3), and the micro switch (1013-6) feeds back the overall signal, at which time the expansion control solenoid valve (7) is powered off and closed, and the gas cylinder (1) stops delivering gas; When the system issues a retraction command, the retraction control solenoid valve (5) opens, and the high-pressure gas in the gas cylinder (1) enters the second air chamber (1023) in the actuator (10) through the main control solenoid valve (3), the main gas pipeline (4), the retraction control solenoid valve (5), the retraction pipeline (6) and the retraction gas guide bolt (11) in sequence; the high-pressure gas enters the interior through the slope structure of the sliding sleeve (1004) and the vent hole on the side wall, pushing the unlocking sleeve (1020) to drive the limit clamping ring (1017) to move, and the limit clamping ring (1017) touches the locking clamping ring (1018) and pushes the locking clamping ring (1018) to squeeze the compression spring (1019), the compression spring (1019) is compressed, and the locking clamping ring (1018) moves to release the limit on the steel ball (1003), and the steel ball (1003) is released from the outer cylinder. The threaded end cover (1007) falls off from the groove to achieve unlocking, and the high-pressure gas continues to push the sliding sleeve (1004) to move; the limiting effect of the sliding sleeve (1004) on the trigger head (1013-1) is released, and the trigger head (1013-1) is reset under the action of the trigger spring (1013-2), the spring pressure plate (1013-3) rebounds, and the micro switch (1013-6) outputs a successful unlocking signal. After a predetermined delay, the retraction control solenoid valve (5) and the main control solenoid valve (3) are closed, and the gas cylinder (1) stops supplying gas, thereby achieving the retraction of the drive deployment device; in addition, during retraction, the buffer oil flows from the second oil chamber (1012) through the adjustable flow hole (1008) and the oil hole at the end of the piston rod (1014) to the first oil chamber (1005), providing oil buffer force for the retraction process.

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