Unlocking device for main landing gear cabin door and main landing gear cabin door

Abstract

The utility model discloses an unlocking device for a main landing gear cabin door and the main landing gear cabin door. The unlocking device comprises a power supply module, a control module and a point control switch, the electric connector comprises a first access point and a second access point; the first access point is electrically connected with the input end of the motor, and the second access point is electrically connected with the output end of the motor; the power module is electrically connected with the first access point through the point control switch, and the control module is electrically connected with the power module and the point control switch and used for transmitting a first voltage signal output by the power module to the first access point through the point control switch so as to control the motor to drive the cam disc to rotate by a preset angle and then abut against the bearing piece, and the lock hook tilts up. The locking ring is separated from the locking ring in the main landing gear cabin door. By the adoption of the technical means, the control module transmits the first voltage signal output by the power module to the first access point through the point control switch so that the lock hook can be separated from the lock ring in the main undercarriage cabin door, onboard functions do not need to be used, and opening of the main undercarriage cabin door can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of aircraft assembly, in particular to an unlocking device for a main landing gear door and the main landing gear door. Background Art

[0002] The main landing gear door lock is used to lock the door after the main landing gear inner door is retracted.

[0003] At present, the main landing gear door lock is mainly designed with two unlocking modes: hydraulic unlocking and electric unlocking. However, both unlocking modes rely on onboard functions, that is, the aircraft needs to be able to meet the functions of full-aircraft pressure and full-aircraft power-on. If the main landing gear inner door needs to be closed during the aircraft assembly stage, the aircraft does not yet have the function of full-aircraft power-on, and there is a lack of a simple-to-operate external unlocking function to meet the unlocking needs. In addition, during the aircraft assembly stage, a small oil truck can be used to directly connect to the hydraulic port on the rear side of the door upper lock, slowly increase the pressure, and supply pressure to the hydraulic actuator to push the unlocking hook, but this method is prone to problems such as hydraulic oil leakage and oil pollution. Utility Model Content

[0004] The utility model provides a main landing gear door unlocking device and a main landing gear door, which can realize the opening of the main landing gear door without using an onboard function.

[0005] In a first aspect, an embodiment of the utility model provides an unlocking device for a main landing gear door, comprising: a power module, a control module and a point control switch;

[0006] The main landing gear door comprises an electrical connector, a motor, a cam plate, a bearing member and a locking hook, wherein the motor is fixedly connected to the cam plate, the cam plate abuts against the bearing member, and the bearing member is fixedly connected to the locking hook;

[0007] The electrical connector includes a first access point and a second access point; the first access point is electrically connected to the input end of the motor, and the second access point is electrically connected to the output end of the motor;

[0008] The power module is electrically connected to the first access point through the point control switch, and the control module is electrically connected to the power module and the point control switch respectively, and is used to transmit the first voltage signal output by the power module to the first access point through the point control switch, so as to control the motor to drive the cam disc to rotate by a preset angle and then abut against the bearing member, and the lock hook is tilted and disengaged from the lock ring in the main landing gear door.

[0009] Optionally, the electrical connector further includes a third access point; the main landing gear door further includes a micro switch, and the micro switch includes a first switch contact and a second switch contact; the third access point is electrically connected to the first switch contact; the second switch contact is electrically connected to the input end of the motor;

[0010] The power module is electrically connected to the input end of the motor through the third access point, the first switch contact and the second switch contact; the control module is also electrically connected to the micro switch, and is used to transmit the second voltage signal output by the power module to the input end of the motor through the third access point and the micro switch, so as to control the cam plate to continue to rotate to the initial position after rotating a preset angle.

[0011] Optionally, the electrical connector further includes a fourth access point; the micro switch further includes a third switch contact; the fourth access point is electrically connected to the third switch contact;

[0012] The power module is electrically connected to the fourth access point through the third access point, the first switch contact and the third switch contact; the control module is used to transmit the third voltage signal output by the power module to the fourth access point through the third access point and the micro switch to control the lock hook to be stationary.

[0013] Optionally, the unlocking device further comprises: an unlocking status indicator light;

[0014] The unlocking status indicator light is arranged in series between the fixed potential terminal and the fourth access point; the voltage output by the fixed potential terminal is smaller than the voltage output by the fourth access point.

[0015] Optionally, the unlocking device further comprises an insertion head;

[0016] The insertion head includes a plurality of insertion points, which correspond one-to-one to and are electrically connected with access points in the electrical connector.

[0017] Optionally, the unlocking device further includes: a power conversion module;

[0018] The power conversion module is electrically connected to the power module.

[0019] Optionally, the unlocking device further includes: a power switch and a power working status indicator light;

[0020] The power working state indicator light is electrically connected to the power module through the power switch; the control module is also electrically connected to the power switch for controlling the working state of the power switch.

[0021] Optionally, the power switch, the power working status indicator light, the power module, the control module and the point control switch are arranged in the same housing.

[0022] Optionally, the unlocking device further includes: an unlocking status indicator light; the electrical connector further includes a fourth access point; the unlocking status indicator light is arranged in series between the fixed potential terminal and the fourth access point; the voltage output by the fixed potential terminal is less than the voltage output by the fourth access point;

[0023] The power working status indicator light is located on a side close to the power switch; the unlocking status indicator light is located on a side close to the point control switch.

[0024] In a second aspect, an embodiment of the utility model further provides a main landing gear door, comprising the unlocking device for the main landing gear door as described in any one of the first aspect.

[0025] According to the technical solution provided by the embodiment of the utility model, the power module is electrically connected to the first access point through the point control switch, the control module is electrically connected to the power module and the point control switch respectively, when the control module controls the point control switch to be turned on, the first voltage signal output by the power module is transmitted to the first access point through the point control switch, at this time, the first access point, the motor and the second access point form a loop, the motor starts, and then drives the cam disc to rotate by a preset angle and abut against the bearing member, the bearing member drives the lock hook to tilt, that is, the lock hook rotates in a clockwise direction and disengages from the lock ring in the main landing gear door, and the lock can be unlocked outside the aircraft without powering on the entire aircraft. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the electrical principle of an unlocking device for a main landing gear door provided in an embodiment of the utility model;

[0027] Figure 2 A schematic diagram of the structure of an upper lock in a main landing gear door provided by an embodiment of the utility model;

[0028] Figure 3 A schematic diagram of electrical connections of a control module in an unlocking device for a main landing gear door provided by an embodiment of the utility model;

[0029] Figure 4 The present invention is a top view schematic diagram of an unlocking device for a main landing gear door provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0031] It should be noted that the terms "first", "second", etc. in the specification and claims of the present utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the utility model described herein can be implemented in an order other than those illustrated or described herein.

[0032] Figure 1 A schematic diagram of the electrical principle of a main landing gear door unlocking device provided by an embodiment of the utility model, Figure 2 A schematic diagram of the structure of an upper lock in a main landing gear door provided by an embodiment of the utility model, Figure 3 The electrical connection diagram of the control module in the unlocking device for the main landing gear door provided by the embodiment of the utility model is as follows: Figure 1-Figure 3 As shown, the unlocking device includes a power module 10, a control module 20 and a point control switch 30; the main landing gear door includes an electrical connector 40, a motor 50, a cam plate 60, a bearing 70 and a lock hook 80, the motor 50 is fixedly connected to the cam plate 60, the cam plate 60 abuts against the bearing 70, and the bearing 70 is fixedly connected to the lock hook 80; the electrical connector 40 includes a first access point 401 and a second access point 402; the first access point 401 is electrically connected to the input end of the motor 50, and the second access point 402 is electrically connected to the output end of the motor 50; the power module 10 is electrically connected to the first access point 401 through the point control switch 30, and the control module 20 is electrically connected to the power module 10 and the point control switch 30 respectively, and is used to transmit the first voltage signal output by the power module 10 to the first access point 401 through the point control switch 30, so as to control the motor 50 to drive the cam plate 60 to rotate a preset angle and then abut against the bearing member 70, and the lock hook 80 is tilted and disengaged from the lock ring (not shown in the figure) in the main landing gear door.

[0033] Specifically, the main landing gear door includes a main lifting door upper lock, which fixes the door in the retracted terminal position by hooking the roller on the door. At the moment of locking, the kinetic energy of the main lifting inner door at the end of the retracting stroke is transmitted to the lock hook 80 of the upper lock through the lock ring. The lock hook 80 is connected to the driving crank 100 through two tension springs 90. After the lock ring on the door enters the lock hook 80, it presses the lock hook 80 to rotate, and the roller at the tail end of the driving crank 100 slides against the surface of the lock hook 80 until it falls into the lock hook blocker. The roller and the blocker press each other to achieve the locking of the mechanism, and it cannot be opened without external drive.

[0034] At present, when hydraulic unlocking is adopted, the external power required for the mechanism unlocking is provided by the hydraulic actuator 110. Under the thrust provided by the hydraulic actuator 110, the crank 100 is driven to rotate counterclockwise to disengage the tail roller from the sear. The hydraulic actuator 110 is preloaded by a compression spring. Its purpose is to prevent accidental unlocking when the lock hook 80 is subjected to any disturbance load and the oil supply or return oil pressure jumps to 500psi, so as to ensure the stable and safe locking state. Auxiliary unlocking, i.e. electric unlocking, is realized by a set of electromagnetic drive mechanisms, which are mainly composed of a motor 50, a worm and a cam plate 60. The electric power input through the electrical connector 40 drives the motor 50 to rotate. This rotational kinetic energy is transmitted to the cam plate 60 through the worm connected to the motor 50, thereby causing the bearing 70 in contact with the cam plate 60 to rotate, and finally the tail roller is disengaged from the sear to unlock. This actuation process is also controlled by a micro switch 120 that is mechanically engaged with the cam plate 60. It should be noted that both hydraulic unlocking and electric unlocking require the entire machine to be powered on or pressed down to unlock, and unlocking cannot be achieved outside the machine.

[0035] It is understandable that the upper lock also includes structures such as a lock hook bearing shaft 130, a brake pin 140, a tail end roller 150, a striker 160, a proximity sensor 170, and a sensor target 180. The embodiment of the utility model does not specifically limit the specific structure of the upper lock.

[0036] Specifically, after the upper lock of the main landing gear door is locked, the lock hook 80 is in a stationary state, the power module 10 is electrically connected to the first access point 401 through the point control switch 30, and the control module 20 is electrically connected to the power module 10 and the point control switch 30 respectively. The power module 10 supplies power to the control module 20. When the control module 20 controls the point control switch 30 to turn on, the first voltage signal output by the power module 10 is transmitted to the first access point 401 through the point control switch 30. At this time, the first access point 401, the motor 50 and the second access point 402 form a loop, and the motor 50 is started, thereby driving the cam plate 60 to rotate by a preset angle and then abut against the bearing member 70. The bearing member 70 drives the lock hook 80 to tilt, that is, the lock hook 80 rotates in a clockwise direction and disengages from the lock ring in the main landing gear door to achieve unlocking.

[0037] It should be noted that rotating the cam plate 60 by a preset angle can cause the protrusion in the cam plate 60 to abut against the bearing member 70, and then the bearing member 70 drives the lock hook 80 to tilt up to achieve unlocking. In this way, there is no need to power on the entire machine, and the unlocking device can be used to achieve external unlocking of the machine. The operation is simple and the reliability is high.

[0038] Exemplarily, the first voltage signal output by the power module 10 may be a voltage of 28V.

[0039] In the unlocking device for the main landing gear door provided by the embodiment of the utility model, the power module is electrically connected to the first access point through the point control switch, the control module is electrically connected to the power module and the point control switch respectively, when the control module controls the point control switch to be turned on, the first voltage signal output by the power module is transmitted to the first access point through the point control switch, at this time, the first access point, the motor and the second access point form a loop, the motor starts, and then drives the cam disc to rotate by a preset angle and abut against the bearing member, the bearing member drives the lock hook to tilt, that is, the lock hook rotates in the clockwise direction and disengages from the lock ring in the main landing gear door, and the outside unlocking can be achieved without powering on the entire aircraft.

[0040] Optional, continue to refer to Figure 1-Figure 3 The electrical connector 40 also includes a third access point 403; the main landing gear door also includes a micro switch 120, the micro switch 120 includes a first switch contact 1201 and a second switch contact 1202; the third access point 403 is electrically connected to the first switch contact 1201; the second switch contact 1202 is electrically connected to the input end of the motor 50; the power module 10 is electrically connected to the input end of the motor 50 through the third access point 403, the first switch contact 1201 and the second switch contact 1202; the control module 20 is also electrically connected to the micro switch 120, and is used to transmit the second voltage signal output by the power module 10 to the input end of the motor 50 through the third access point 403 and the micro switch 120, so as to control the cam plate 60 to rotate to the initial position after rotating by a preset angle.

[0041] Specifically, when the first voltage signal output by the power module 10 is input by the first access point 401 and output by the second access point 402, the motor 50 is started to drive the cam plate 60 to rotate, and the hatch can be opened after the cam plate 60 rotates by a preset angle. The control module 20 is also electrically connected to the micro switch 120. The control module 20 transmits the second voltage signal output by the power module 10 to the input end of the motor 50 through the third access point 403 and the micro switch 120, so as to control the cam plate 60 to rotate to the initial position after the preset angle. The micro switch 120 can be understood as a single-pole double-throw switch. When the cam plate 60 rotates to a preset angle, the second voltage signal output by the power module 10 is input by the third access point 403 and output by the second access point 402, that is, the second voltage signal passes through the first switch contact 1201, the second switch contact 1202, the input end of the motor 50 and the output end of the motor 50 in sequence, so that the motor 50 can continue to rotate on the basis of rotating the preset angle until the cam plate 60 rotates to the initial position, that is, the sum of the angle of the cam plate 60 continuing to rotate and the preset angle is 360°. In other words, during the process of unlocking the door, the cam plate 60 needs to rotate 360° so as to continue to unlock the door after the door is locked.

[0042] It should be noted that when the second voltage signal is input from the third access point 403 and output from the second access point 402, the hatch is still in the open state.

[0043] Optional, continue to refer to Figure 1 and Figure 2 The electrical connector 40 also includes a fourth access point 404; the micro switch 120 also includes a third switch contact 1203; the fourth access point 404 is electrically connected to the third switch contact 1203; the power module 10 is electrically connected to the fourth access point 404 through the third access point 403, the first switch contact 1201 and the third switch contact 1203; the control module 10 is used to transmit the third voltage signal output by the power module 10 to the fourth access point 404 through the third access point 403 and the micro switch 120, so as to control the lock hook 80 to be stationary.

[0044] Specifically, when the hatch is opened and the cam plate 60 rotates to the initial position, the motor 50 stops rotating, and the power module 10 is electrically connected to the fourth access point 404 through the third access point 403, the first switch contact 1201 and the third switch contact 1203. That is, the third voltage signal output by the power module 10 is input by the third access point 403 and output by the fourth access point 404, the first switch contact 1201 is electrically connected to the third switch contact 1203, and the motor 50 is not connected to the loop. In this way, the motor 50 does not rotate, and the lock hook 80 is in a stationary state.

[0045] Optional, continue to refer to Figure 1and Figure 2 The unlocking device also includes: an unlocking status indicator light 190; the unlocking status indicator light 190 is arranged in series between the fixed potential terminal 200 and the fourth access point 404; the voltage output by the fixed potential terminal 200 is less than the voltage output by the fourth access point 404.

[0046] Specifically, the unlocking status indicator light 190 is arranged in series between the fixed potential terminal 200 and the fourth access point 404. When the fourth access point 404 outputs a voltage, since the voltage output by the fixed potential terminal 200 is less than the voltage output by the fourth access point 404, that is, the unlocking status indicator light 190 is arranged in series between the low potential and the high potential, the unlocking status indicator light 190 is lit. In other words, when the third voltage signal output by the power module 10 is transmitted to the fourth access point 404 through the third access point 403, the first switch contact 1201, and the third switch contact 1203, the unlocking status indicator light 190 is lit.

[0047] Furthermore, when the lock hook is in a stationary state, the unlocking state indicator light 190 is on, and when the lock hook is in an actuating state, the motor 50 is working, and the voltage is outputted by the second access point 402 instead of the fourth access point, that is, the unlocking state indicator light 190 is off. When the door changes from a locked state to an unlocked state, the state of the lock hook 80 is stationary-acting-stationary, and the working state of the unlocking state indicator light 190 is on-off-on, so that the operator can determine whether the door is fully unlocked according to the working state of the unlocking state indicator light 190.

[0048] Optional, continue to refer to Figure 1 and Figure 2 The unlocking device also includes an insertion head 210; the insertion head includes a plurality of insertion points 210, and the insertion points 210 correspond one-to-one to the access points in the electrical connector 40 and are electrically connected.

[0049] Specifically, the insertion point 210 may include a first insertion point 2101, a second insertion point 2102, a third insertion point 2103, and a fourth insertion point 2104. The insertion points 210 correspond one-to-one to and are electrically connected to the access points in the electrical connector 40, that is, the number of the insertion points 210 is the same as the number of the access points in the electrical connector 40 and corresponds one-to-one. Exemplarily, the first insertion point 2101 corresponds to and is electrically connected to the first access point 401, which can facilitate the unlocking device to unlock the hatch.

[0050] Optional, continue to refer to Figure 1 The unlocking device also includes: a power conversion module 220; the power conversion module 220 is electrically connected to the power module 10.

[0051] Specifically, the power conversion module 220 is used to convert the voltage output by the power module 10 into the voltage required by the control module 20, so that the control module 20 can control the unlocking device to work.

[0052] Exemplarily, the power conversion module 220 can convert the 220V voltage output by the power module 10 into a 28V voltage.

[0053] Optional, Figure 4 A schematic top view of a main landing gear door unlocking device provided by an embodiment of the utility model, referring to Figure 1 and Figure 4 The unlocking device also includes: a power switch 230 and a power working status indicator light 240; the power working status indicator light 240 is electrically connected to the power module 10 through the power switch 230; the control module is also electrically connected to the power switch 230 for controlling the working status of the power switch 230.

[0054] Specifically, when the control module 20 controls the power switch 230 to be closed, the power module 10 can supply power to the third access point 403, and supply power to the first access point 401 through the point control switch 30, thereby realizing the unlocking function. The power working status indicator 240 is electrically connected to the power module 10 through the power switch 230, that is, when the power switch 230 is closed, the power module 10 works, and the power working status indicator 240 is on. In this way, the on and off of the power working status indicator 240 can intuitively determine whether the power module 10 is working, so that the user can grasp the working status of the power module 10.

[0055] Optional, continue to refer to Figure 4 The power switch 230, the power working status indicator light 240, the power module 10, the control module (not shown in the figure) and the point control switch 30 are arranged in the same housing 250, so that the unlocking device can be designed in a structured, integrated and miniaturized manner.

[0056] Optional, continue to refer to Figure 1 and Figure 4 The unlocking device also includes: an unlocking status indicator light 190; the electrical connector 40 also includes a fourth access point 404; the unlocking status indicator light 190 is arranged in series between the fixed potential terminal 200 and the fourth access point 404; the voltage output by the fixed potential terminal 200 is less than the voltage output by the fourth access point 404; the power working status indicator light 240 is located on the side close to the power switch 230; the unlocking status indicator light 190 is located on the side close to the point control switch 30.

[0057] Specifically, the power switch 230 and the power working state indicator light 240 are arranged adjacent to each other in the housing 250, which is conducive to the user judging the working state of the power switch 230 according to the on and off of the power working state indicator light 240, and then determining whether the power module 10 is working. Since the control module transmits the first voltage signal output by the power module 10 to the first access point 401 through the point control switch 30 to realize the door unlocking, the unlocking state indicator light 190 and the point control switch 30 are arranged adjacent to each other in the housing 250, which is conducive to determining whether the door is unlocked in place according to the unlocking state indicator light 190, and such a configuration is compact.

[0058] In summary, in the unlocking device for the main landing gear door provided by the embodiment of the utility model, the power module is electrically connected to the first access point through the point control switch, the control module is electrically connected to the power module and the point control switch respectively, when the control module controls the point control switch to be turned on, the first voltage signal output by the power module is transmitted to the first access point through the point control switch, at this time, the first access point, the motor and the second access point form a loop, the motor starts, and then drives the cam disc to rotate a preset angle and abut against the bearing member, the bearing member drives the lock hook to tilt, that is, the lock hook rotates in a clockwise direction and disengages from the lock ring in the main landing gear door, and the whole machine does not need to be powered on, that is, the machine can be unlocked outside, and the overall tooling is simple to operate and has high reliability. In addition, by setting the unlocking status indicator light in series between the fixed potential terminal and the fourth access point, when the door changes from the locked state to the unlocked state, the state of the lock hook is static-action-static, and the working state of the unlocking status indicator light is on-off-on, so that the operator can determine whether the door is unlocked in place according to the working state of the unlocking status indicator light.

[0059] Based on the same utility model concept, the utility model embodiment also provides a main landing gear door, including the unlocking device described in the above embodiment. Therefore, the main landing gear door provided by the utility model embodiment also has the above beneficial effects, which will not be repeated here.

[0060] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, combinations and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. An unlocking device for a main landing gear door, characterized in that: include: Power module, control module and point control switch; The main landing gear door comprises an electrical connector, a motor, a cam plate, a bearing member and a locking hook, wherein the motor is fixedly connected to the cam plate, the cam plate abuts against the bearing member, and the bearing member is fixedly connected to the locking hook; The electrical connector includes a first access point and a second access point; the first access point is electrically connected to the input end of the motor, and the second access point is electrically connected to the output end of the motor; The power module is electrically connected to the first access point through the point control switch, and the control module is electrically connected to the power module and the point control switch respectively, and is used to transmit the first voltage signal output by the power module to the first access point through the point control switch, so as to control the motor to drive the cam disc to rotate by a preset angle and then abut against the bearing member, and the lock hook is tilted and disengaged from the lock ring in the main landing gear door.

2. The main landing gear door unlocking device according to claim 1, characterized in that: The electrical connector further includes a third access point; the main landing gear door further includes a micro switch, and the micro switch includes a first switch contact and a second switch contact; the third access point is electrically connected to the first switch contact; the second switch contact is electrically connected to the input end of the motor; The power module is electrically connected to the input end of the motor through the third access point, the first switch contact and the second switch contact; the control module is also electrically connected to the micro switch, and is used to transmit the second voltage signal output by the power module to the input end of the motor through the third access point and the micro switch, so as to control the cam plate to continue to rotate to the initial position after rotating a preset angle.

3. The main landing gear door unlocking device according to claim 2, characterized in that: The electrical connector further includes a fourth access point; the micro switch further includes a third switch contact point; the fourth access point is electrically connected to the third switch contact point; The power module is electrically connected to the fourth access point through the third access point, the first switch contact and the third switch contact; the control module is used to transmit the third voltage signal output by the power module to the fourth access point through the third access point and the micro switch to control the lock hook to be stationary.

4. The main landing gear door unlocking device according to claim 3, characterized in that: The unlocking device further comprises: an unlocking status indicator light; The unlocking status indicator light is arranged in series between the fixed potential terminal and the fourth access point; the voltage output by the fixed potential terminal is smaller than the voltage output by the fourth access point.

5. The main landing gear door unlocking device according to claim 1, characterized in that: The unlocking device also includes an insertion head; The insertion head includes a plurality of insertion points, which correspond one-to-one to and are electrically connected with access points in the electrical connector.

6. The main landing gear door unlocking device according to claim 1, characterized in that: The unlocking device further comprises: a power conversion module; The power conversion module is electrically connected to the power module.

7. The main landing gear door unlocking device according to claim 1, characterized in that: The unlocking device also includes: a power switch and a power working status indicator light; The power working state indicator light is electrically connected to the power module through the power switch; the control module is also electrically connected to the power switch for controlling the working state of the power switch.

8. The main landing gear door unlocking device according to claim 7, characterized in that: The power switch, the power working status indicator light, the power module, the control module and the point control switch are arranged in the same housing.

9. The main landing gear door unlocking device according to claim 8, characterized in that: The unlocking device further includes: an unlocking status indicator light; the electrical connector further includes a fourth access point; the unlocking status indicator light is arranged in series between the fixed potential terminal and the fourth access point; the voltage output by the fixed potential terminal is less than the voltage output by the fourth access point; The power working status indicator light is located on a side close to the power switch; the unlocking status indicator light is located on a side close to the point control switch.

10. A main landing gear door, characterized in that: It comprises the unlocking device for the main landing gear door as described in any one of claims 1-9.

Images