An aircraft RAT misrelease prevention device and an aircraft comprising the device

Abstract

An aircraft RAT misrelease prevention device includes a retrieval latch including a locating pin, a handle, and a flexible cable connected between the locating pin and the handle; an elbow pipe including a first end, a second end, and a channel formed within the elbow pipe, the channel extending from the first end to the second end, the locating pin being insertable into the channel from the second end of the elbow pipe and extendable out of the first end. At least one detent is provided on the locating pin, and at least one first groove is formed on an inner surface of the channel. The structure of the RAT misrelease prevention device can ensure locking of the RAT. An aircraft including the RAT misrelease prevention device is also involved.

Description

Technical Field

[0001] This application relates to the field of aircraft design, and in particular to the design of a device to prevent accidental release of an aircraft's ram air turbine (RAT). Background Technology

[0002] A ram air turbine (RAT) is a crucial component of an aircraft. It provides power to the aircraft in the event of a loss of both primary and auxiliary power, enabling an emergency landing and thus improving survivability. The RAT includes a propeller. In certain situations, the propeller is deployed, and the rapid airflow impacts it, causing it to rotate. This rotation drives a connected electric motor and hydraulic pump to generate emergency power to restart the engine and power the aircraft's operating systems and electronic equipment.

[0003] The Recovery Actuator (RAT) of large civil aircraft is typically located under the fuselage of the wind turbine. When the aircraft is on the ground, the RAT needs to be locked in the recovery position to prevent accidental release on the ground, which could cause equipment damage or personnel injury. Generally, the RAT accidental release prevention device includes a recovery locking pin. When the aircraft is on the ground, the recovery locking pin is inserted into a recovery locking pin hole in the skin to lock the RAT, ensuring it will not be released while the aircraft is on the ground. Before takeoff, the recovery locking pin needs to be removed so that it will not prevent the RAT from releasing while the aircraft is in flight, ensuring flight safety.

[0004] However, existing RAT (Recovery Aid) misrelease prevention devices sometimes malfunction. For example, when an aircraft is on the ground, inspections and maintenance are sometimes performed, including checks on the aircraft's airborne status, such as the functionality of the air traffic control transponder. During these checks, some aircraft parameters are set to airborne status. If the spring in the recovery lock pin support does not provide sufficient clamping force on the recovery lock pin, the RAT's recovery lock pin may disengage from its slot, leading to an accidental RAT release.

[0005] Furthermore, the locking cord is supported by a flexible material, resulting in a tortuous extension path, which can lead to the locking cord not being properly inserted. Additionally, because the RAT is in a closed compartment during recovery, operators cannot visually inspect whether the locking cord is in place. All of these factors can cause the locking cord to fail to securely hold the RAT in its recovery position, creating a risk of the RAT accidentally releasing while the aircraft is on the ground.

[0006] Figure 1 An existing RAT locking pin is shown, in which the RAT 100 is locked in its retracted position by locking pin 104. However, the locking pin 104 does not include a design to prevent loosening, so there is a risk that the locking pin 104 may come loose from the RAT.

[0007] Figure 2 A prior art RAT (Retractable Actuator) limiting safety device is shown. In this device, a limiting safety device 123 is used to lock the RAT in its retracted state. In this limiting safety device, the retractable locking pin is rod-shaped and generally straight, which restricts the selection and arrangement of the locking pin hole opening position in the fuselage. Furthermore, this limiting safety device has a complex structure, and its limiting position is close to the actuator spring, posing a risk of accidental RAT release, which could easily damage adjacent components.

[0008] Therefore, in the field of aircraft design, there is a need for further improvements to the RAT (Rapid Aircraft Terminal) mis-release prevention device to ensure that RAT mis-release is prevented. Summary of the Invention

[0009] This application is made to overcome the technical problems existing in the prior art RAT accidental release prevention devices described above. The purpose of this application is to provide an aircraft RAT accidental release prevention device that can ensure the locking of the RAT and prevent accidental RAT release.

[0010] In this application, an aircraft RAT (Rapid Aircraft Release) accident prevention device includes: a retrieval lock pin, comprising a positioning pin, a handle, and a flexible cable connecting the positioning pin and the handle; a bend, including a first end, a second end, and a channel formed within the bend, the channel extending from the first end to the second end, the positioning pin being insertable from the second end of the bend into the channel and extending from the first end; and a retrieval lock pin bracket, the retrieval lock pin bracket having a bracket hole, at least the first end of the bend being supported in the bracket hole. At least one latch is provided on the positioning pin, and at least one first groove is formed on the inner surface of the channel. When the positioning pin is in the channel, the latch engages in the first groove. When the positioning pin moves to a position where the latch leaves the bend from the first end, the retrieval lock pin is rotatable relative to the bend, causing the latch to abut against the first end and preventing the retrieval lock pin from being withdrawn.

[0011] In the RAT accidental release prevention device with the above structure, the structure of the locking pin provided on the positioning pin and the first groove provided in the bend allows the positioning pin to be inserted into the RAT locking pin hole. By rotating the positioning pin, the locking pin is displaced from the first groove, preventing the positioning pin from being pulled back, thereby helping to ensure the locking of the RAT. When it is necessary to remove the RAT accidental release prevention device, the locking pin is aligned with the first groove by rotation, thereby allowing the positioning pin to be pulled back.

[0012] Preferably, at least one locking pin is provided at least at one location on the first end of the bend and within the bracket hole. This locking pin prevents the locating pin from rotating excessively and also provides an indication of the locating pin's rotation into position through the collision between the locking pin and the locking pin.

[0013] In one specific structure, a circumferentially extending groove is formed in the support hole, and at least one locking pin is disposed in the circumferential groove. The circumferential groove can be formed as annular or partially annular.

[0014] Alternatively, another arrangement of the locking pin is that at least one locking pin is formed on the end face of the first end of the bend.

[0015] Preferably, at least one locking stop includes a first locking stop, which is disposed adjacent to the first groove. The position of the first locking stop can define the rotation direction of the locating pin. For example, when the first locking stop is located on the clockwise side of the first groove, the locating pin needs to be rotated counterclockwise when locking the RAT, and also when removing the locating pin; or, when the first locking stop is located on the counterclockwise side of the first groove, the locating pin rotates clockwise when locking and counterclockwise when removing.

[0016] Preferably, at least one locking block further includes a second locking block, which is spaced apart from the first locking block at a third angle. This third angle is, for example, 90°.

[0017] Preferably, an outer flange is formed on the outer surface of the bent tube at a position corresponding to the first groove, and a second groove is formed in the bracket hole of the recovery lock pin bracket. The shape of the second groove is configured such that the outer flange can fit into the second groove. The fit between the second groove and the outer flange can prevent relative rotation of the bent tube in the bracket hole, thereby improving the operational stability of the RAT accidental release prevention device.

[0018] Preferably, the bend is made of a malleable material, and the flexible cable is a steel cable. The malleable material allows the shape of the bend to be tailored to the space inside the aircraft, thereby defining the path of the recovery pin to prevent the bend from interfering with other parts of the aircraft.

[0019] Preferably, two locking pins, namely a first locking pin and a second locking pin, are provided on the recovery locking pin, which are spaced apart at a first angle, and two first grooves spaced apart at a second angle are provided in the bend, the first angle and the second angle being equal. The first and second angles are, for example, 180°.

[0020] This application also relates to an aircraft including a RAT and the RAT accidental release prevention device as described above, wherein the RAT includes a RAT locking pin hole into which a locating pin can be inserted to lock the RAT in the recovery position.

[0021] The recovery lock pin bracket is fixedly mounted on the aircraft fuselage. The radius of the lock pin is 1 mm, thus preferably, the distance between the recovery lock pin bracket and the RAT lock pin hole is greater than 4 mm. This distance provides sufficient margin for compensating for installation errors by the RAT and the RAT accidental release prevention device. Attached Figure Description

[0022] The accompanying drawings illustrate a non-limiting preferred embodiment of this application, and the features and advantages of this application become more apparent when viewed in conjunction with the drawings. Wherein:

[0023] Figure 1 A prior art RAT locking pin is shown.

[0024] Figure 2 A prior art RAT limit safety device is shown.

[0025] Figure 3 A schematic structural diagram of the RAT accidental release prevention device according to the first embodiment of this application is shown.

[0026] Figure 4 It shows Figure 3 Another schematic diagram of the RAT accidental release prevention device shows the structure of the recovery lock pin more clearly, with the bend removed.

[0027] Figure 5 It shows Figure 3 A three-dimensional view of the bend in the RAT accidental release prevention device.

[0028] Figure 6a A plan view of the retrieval lock pin bracket of the RAT accidental release prevention device according to the first embodiment is shown.

[0029] Figure 6b It shows Figure 6a A cross-sectional view of the recycling lock pin bracket.

[0030] Figure 7 A schematic cross-sectional view is shown of the recovery lock pin and the bend support in the recovery lock pin bracket.

[0031] Figure 8 A schematic diagram of a RAT accidental release prevention device installed next to the RAT is shown.

[0032] Figure 9 A perspective view of the bend in the RAT accidental release prevention device according to the second embodiment of this application is shown.

[0033] Figure 10 A schematic perspective view of the recovery lock pin and the bend tube support of the RAT accidental release prevention device of the second embodiment is shown.

[0034] (Symbol Explanation)

[0035] 100 RAT (Prior Art)

[0036] 104 Locking pin (Prior art)

[0037] 123 Limit safety device (prior art)

[0038] 1 RAT

[0039] 11 RAT locking pin holes

[0040] 10 RAT Accidental Release Prevention Device

[0041] 20 Recycled Lock Pins

[0042] 21 Positioning pins

[0043] 22 handles

[0044] 23 Flexible cables

[0045] 24 First Card Cancellation

[0046] 25 Second Card Pin

[0047] 30 bend

[0048] 31 First end

[0049] 32 Second end

[0050] 33 First locking pin block

[0051] 34 Second locking pin stop

[0052] 35 First Groove

[0053] 36 Outer flange

[0054] 40 signs

[0055] 41. Buckle

[0056] 50 Recycled Locking Pin Brackets

[0057] 51 bracket holes

[0058] 52 Second Groove

[0059] 53 Third Groove Detailed Implementation

[0060] The specific embodiments of this application will now be described in detail with reference to the accompanying drawings. It should be understood that the embodiments shown in the drawings are merely preferred embodiments of this application and do not constitute a limitation on the scope of this application. Those skilled in the art can make various obvious modifications, variations, and equivalent substitutions to this application based on the embodiments shown in the drawings. Furthermore, without contradiction, the technical features in the different embodiments described below can be arbitrarily combined with each other, all of which fall within the protection scope of this application.

[0061] <First Embodiment>

[0062] Figures 3-8 The structure of the RAT accidental release prevention device 10 according to the first embodiment of this application is shown.

[0063] Figure 3 A schematic structural diagram of the RAT mis-release prevention device 10 of this application is shown. The RAT mis-release prevention device 10 includes a retrieval locking pin 20 and a bend 30. The bend 30 includes a channel extending through it, the retrieval locking pin 20 can be inserted into the bend 30 from one end of the bend 30, extend in the channel of the bend 30, and protrude from the other end of the bend 30. Thus, the bend 30 can define the travel path of the retrieval locking pin 20, ensuring that the retrieval locking pin 20 extends correctly to the position of the RAT and does not interfere with other components in the aircraft.

[0064] Preferably, the bend 30 can be made of a plastically deformable material, so that the shape of the bend 30 can be adjusted as needed, thereby adjusting the extension path of the recovery lock pin 20.

[0065] like Figure 3 As further shown, the RAT mis-release prevention device 10 may also include a label 40 bearing a message such as "Remove before takeoff," reminding operators that the RAT mis-release prevention device 10 needs to be removed from the RAT before takeoff. To increase the visibility of the label 40, it may be red. The label 40 can be attached to the recovery lock pin 20 via a fastener such as a clip 41, specifically to the end of the recovery lock pin 20 furthest from the RAT 1.

[0066] Figure 4 Another schematic structural diagram of the RAT accidental release prevention device 10 is shown, in which the bend 30 is removed, so that the structure of the recovery lock pin 20 can be seen more clearly.

[0067] The two ends of the retraction lock pin 20 are respectively provided with a positioning pin 21 and a handle 22, wherein the positioning pin 21 is located on the end of the retraction lock pin 20 closer to RAT 1 when locking RAT 1, and the handle 22 is located on the end of the retraction lock pin 20 away from RAT 1. Figure 4In the exemplary structure shown, the snap fastener 41 is attached to the handle 22, thereby connecting the label 40 to the handle 22. Of course, in addition to the handle 22, the label 40 can also be attached to any suitable location of the recycling lock pin 20 via the snap fastener 41, depending on the specific application, and these are also within the scope of this application.

[0068] The locating pin 21 and the handle 22 are connected together by a flexible cable 23. The flexible cable 23 is flexible, thus allowing the locking pin 20 to extend along the desired path. An example of the flexible cable 23 is made of steel cable.

[0069] When it is necessary to lock RAT 1 in its retracted position, the locating pin 21 can be inserted into the RAT locking pin hole 11 of RAT 1 (see...). Figure 8 ), thereby preventing RAT 1 from being put down unintentionally.

[0070] In this application, at least one locking pin is provided on the positioning pin 21. Figure 4 In the exemplary structure shown, two locking pins are formed on the positioning pin 21, namely a first locking pin 24 and a second locking pin 25, wherein the first locking pin 24 and the second locking pin 25 are preferably positioned 180° apart from each other.

[0071] Go to Figure 5 The figure shows a perspective view of the bend 30 of the RAT accidental release prevention device 10. The bend 30 includes a first end 31 and a second end 32, wherein when the RAT 1 is locked in its retracted position, the first end 31 is the end closer to the RAT 1, and the second end 32 is the end farther away from the RAT 1.

[0072] At least one first groove 35 is formed on the inner surface of the bend 30, extending from the first end 31 to the second end 32 of the bend 30. Corresponding to the structure of the locating pin 21 shown in the figure, which has a first locking pin 24 and a second locking pin 25 spaced 180° apart, two first grooves 35 are formed on the inner surface of the bend 30, also spaced 180° apart. Correspondingly, an outer flange 36 extending from the first end 31 to the second end 32 is formed on the outer surface of the bend 30 at a position corresponding to the first groove 35.

[0073] Those skilled in the art will recognize that the outer flange 36 is a preferred structure. If the wall thickness of the bend 30 is sufficiently thick, although a first groove 35 is formed on the inner surface of the bend 30, an outer flange 36 is not necessarily formed on the outer surface of the bend 30. Cases excluding the outer flange 36 are also within the scope of this application.

[0074] The cooperation between the first groove 35 and the first locking pin 24 / second locking pin 25 further serves to limit the travel path of the positioning pin 21 of the recovery locking pin 20.

[0075] Alternatively, a first locking pin 24 and a second locking pin 25 spaced 180° apart, and two first grooves 35 spaced 180° apart, are also preferred structures. The first locking pin 24 and the second locking pin 25 can also be spaced at other suitable angles as needed, and correspondingly, the two first grooves 35 can also be spaced at other angles, as long as the angle between the first locking pin 24 and the second locking pin 25 is equal to the angle between the two first grooves 35.

[0076] Furthermore, those skilled in the art will know that other numbers of locking pins and first grooves 35 can be provided.

[0077] During the insertion and extension of the retrieval locking pin 20 into the bend 30, the first locking pin 24 and the second locking pin 25 on the positioning pin 21 respectively engage in the first groove 35. As the retrieval locking pin 20 continues to advance until the first locking pin 24 and the second locking pin 25 leave the bend 30 from the first end 31, the retrieval locking pin 20 can be rotated relative to the bend 30, causing the first locking pin 24 and the second locking pin 25 to disengage from the first groove 35 on the bend 30. In this way, the first locking pin 24 and the second locking pin 25 will abut against the edge of the bend 30 at the first end 31, thereby preventing the positioning pin 21 from being withdrawn.

[0078] As can be seen, by setting the locking pins (e.g., the first locking pin 24 and the second locking pin 25) on the positioning pin 21 and the first groove 35 in the bend 30, during the locking of RAT 1, the positioning pin 21 can be prevented from being pulled back after it is inserted into place, which helps to ensure that RAT 1 is not accidentally released. When it is necessary to release the RAT accidental release prevention device 10, the positioning pin 21 can be pulled back by aligning the locking pins and the first groove 35.

[0079] Figure 6a and 6b Plan views of the recovery locking pin bracket 50 of the accidental release prevention device 10 are shown respectively. Figure 7 A schematic cross-sectional view shows the state in which the recovery locking pin 20 and the bend 30 are supported in the recovery locking pin bracket 50.

[0080] The recycling pin bracket 50 has a bracket hole 51, the shape of which matches the shape of at least the first end 31 of the bend 30. When an outer flange 36 corresponding to the first groove 35 is formed on the outer surface of the bend 30, two second grooves 52 corresponding to the two outer flanges 36 of the bend 30 are formed in the bracket hole 51. The second grooves 52 extend along the axial direction of the bracket hole 51 (i.e., the direction in which the recycling shrink 20 and the bend 30 are inserted into the bracket hole 51).

[0081] A circumferential groove 53 extending circumferentially around the bracket hole 51 of the recovery locking pin bracket 50 is formed on the inner surface of the bracket hole 51. The circumferential groove 53 may be annular or partially annular. The inner diameter of the circumferential groove 53 is larger than the radial dimension of the first locking pin 24 / second locking pin 25 on the positioning pin 21, thereby allowing the first locking pin 24 and the second locking pin 25 to be accommodated in the circumferential groove 53. The circumferential groove 53 also includes a notch corresponding to the second groove 52 in the bracket hole 51, so as to allow the first locking pin 24 and the second locking pin 25 on the positioning pin 21 to enter the circumferential groove 53. In addition, the inner diameter of the other part of the bracket hole 51, excluding the circumferential groove 53, is smaller than the radial dimension of the first locking pin 24 / second locking pin 25. Thus, after the first locking pin 24 and the second locking pin 25 enter the circumferential groove 53 through the notch, by rotating the positioning pin 21, the first locking pin 24 and the second locking pin 25 are displaced from the notch and the second groove 52, thereby preventing the positioning pin 21 from being pulled out of the bracket hole 51.

[0082] exist Figure 6b As can be seen more clearly, at least one locking block is also provided in the circumferential groove 53. This locking block can engage with the locking pin on the positioning pin 21 to define and indicate the rotational position of the retrieval locking pin 20 relative to the bend 30. When the retrieval locking pin 20 extends through the channel in the bend 30 to the position where the first locking pin 24 and the second locking pin 25 on the positioning pin 21 protrude from the first end 31, and the first locking pin 24 and the second locking pin 25 are engaged in the circumferential groove 53, the operator can rotate the positioning pin 21 relative to the bend 30, for example, by rotating the positioning pin 21 via the handle 22 and the flexible cable 23. During the rotation of the positioning pin 21, the locking pin will contact the locking block. When the locking pin contacts the locking block, the locking block will prevent the positioning pin 21 from continuing to rotate relative to the bend 30. And, when the locking pin contacts the locking block, it indicates that the positioning pin 21 has rotated to the predetermined position.

[0083] In the exemplary structure shown in the figure, there are two first locking blocks 33 and two second locking blocks 34 arranged 180° apart from each other. The first locking blocks 33 and the second locking blocks 34 are arranged at intervals, and adjacent first locking blocks 33 and second locking blocks 34 are preferably 90° apart.

[0084] from Figure 6b As can be further seen, two first locking blocks 33 are respectively formed on one side of each of the two second grooves 52. For example, in the structure shown in the figure, the two first locking blocks 33 are respectively located on one side of the two second grooves 52 in the counterclockwise direction. In this way, when it is necessary to remove the retrieval lock pin 20, by rotating the retrieval lock pin 20 in the counterclockwise direction, the first locking pin 24 and the second locking pin 25 can be aligned with their respective second grooves 52, and then with the first groove 35 on the bend 30, thereby allowing the locating pin 21 to be pulled out. Moreover, when the retrieval lock pin 20 is rotated to the position where the first locking pin 24 and the second locking pin 25 collide with the first locking block 33, the collision with the first locking block 33 indicates to the operator that the first locking pin 24 and the second locking pin 25 have been rotated to the position where they are aligned with the second groove 53, and then with the first groove 35, so that the operator knows that the retrieval lock pin 20 can be pulled outward to remove the retrieval lock pin 20 from RAT 1.

[0085] Those skilled in the art will recognize that the two first locking blocks 33 may also be disposed on one side of the corresponding second groove 52 in the clockwise direction, which is also within the scope of this application.

[0086] In the exemplary structure shown in the figure, the second locking pin block 34 and the first locking pin block 33 are spaced 90° apart. Those skilled in the art will understand that the angle between the second locking pin block 34 and the first locking pin block 33 can also be adjusted according to actual needs. Furthermore, only one second locking pin block 34 may be provided, or even the second locking pin block 34 may be omitted. These are all within the scope of this application.

[0087] The recovery pin bracket 50 can be installed on the aircraft fuselage, such as the aircraft skin or other support structures in the aircraft, and positioned close to RAT 1.

[0088] Figure 8A schematic diagram is shown of the RAT accidental release prevention device 10 of this application inserted into the RAT locking pin hole 11 of the RAT 1. It shows that there is a gap 'a' between the retrieval locking pin bracket 50 and the RAT locking pin hole 11 of the RAT 1. During installation, a gap is left between the retrieval locking pin bracket 50 and the RAT locking pin hole 11 of the RAT 1 to compensate for errors in the installation position of the RAT 1. Typically, the radius of the locking pin on the positioning pin 21 is approximately 1 mm, and correspondingly, the gap 'a' between the retrieval locking pin bracket 50 and the RAT locking pin hole 11 is greater than 4 mm. Thus, even if the locking pin passes through the bracket hole 51 and extends into the space between the retrieval locking pin bracket 50 and the RAT locking pin hole 11, in addition to the space left between the RAT locking pin hole 11 and the retrieval locking pin bracket 50 to accommodate the locking pin, at least 2 mm of allowance is left to compensate for errors in the installation position of the RAT 1.

[0089] Furthermore, based on the specific value of the distance 'a' between the RAT locking pin hole 11 and the retrieval locking pin bracket 50, the length of the positioning pin 21 is increased. This ensures that the locking pin can be accommodated between the RAT locking pin hole 11 and the retrieval locking pin bracket 50, while also ensuring that the positioning pin 21 is fully inserted into the RAT locking pin hole 11. In other words, by increasing the length of the positioning pin 21, the distance 'a' between the RAT locking pin hole 11 and the retrieval locking pin bracket 50 can be increased, thereby providing more leeway to compensate for errors in the installation position of the RAT 1.

[0090] In this application, the structure described above in the first embodiment is preferred because the portion of the positioning pin 21 including the locking pin is accommodated in the bracket hole 51 and does not extend beyond the recovery locking pin bracket 50. The locking pin does not occupy the gap between the RAT locking pin hole 11 and the recovery locking pin bracket 50, thereby not affecting the compensation for the installation position error of the recovery locking pin bracket 50.

[0091] The operation method of the RAT accidental release prevention device 10 of this application will be described below.

[0092] When the aircraft is on the ground, the retrieval locking pin 20 is inserted into the channel within the bend 30 from the second end 32 of the bend 30. The retrieval locking pin 20 extends along the path defined by the bend 30 to the RAT locking pin hole 11 of the RAT 1. When the first locking pin 24 / second locking pin 25 on the positioning pin 21 of the retrieval locking pin 20 enters the circumferential groove 52 in the bracket hole 51, and the positioning pin 21 is inserted, the operator can rotate the positioning pin 21 in the first direction using the handle 22. When the first locking pin 24 / second locking pin 25 collides with the first locking pin stop 33 / second locking pin stop 34, it indicates that the positioning pin 21 has been rotated into place. Through the interaction between the first locking pin 24 / second locking pin 25 and the circumferential groove 52, the retraction of the positioning pin 21 away from the RAT 1 can be prevented, thereby effectively preventing the RAT 1 from being accidentally released.

[0093] The rotation direction for locking and unlocking can be marked on the fuselage at the location where the RAT accidental release prevention device 10 is installed, for example, the rotation direction can be marked on the aircraft skin.

[0094] In addition, after the positioning pin 21 is turned into place, the locking pin 20 can be pulled back towards the second end 32 of the bend 30 to ensure that the first locking pin 24 / second locking pin 25 securely locks the positioning pin 21 in place.

[0095] Before takeoff, the locating pin 21 is rotated in a second direction by the handle 22, which is preferably opposite to the first direction. When the locating pin 21 is rotated to the position where it collides with the first locking block 33, it indicates that the locating pin 21 is aligned with the first groove 35 in the bend 30, so that the locating pin 21 can be pulled back toward the second end 32 to unlock the RAT 1.

[0096] <Second Embodiment>

[0097] Figure 9 and 10 A second embodiment of the RAT accidental release prevention device 10 of this application is shown, wherein the same or similar components are indicated by the same reference numerals. Unless otherwise described to the contrary or conflicting, the specific structures described above with respect to the first embodiment also apply to the second embodiment. The structures of the second embodiment that differ from the first embodiment will be described in detail below.

[0098] Similar to the first embodiment, the RAT accidental release prevention device 10 of the second embodiment also includes a recovery locking pin 20, a bend 30, and a recovery locking pin bracket 50.

[0099] Unlike the first embodiment, in the second embodiment, at least one locking block is formed on the first end 31, specifically on the end face of the first end 31, such as... Figure 9As shown in the diagram. In this configuration, when the positioning pin 21 is inserted into the RAT locking pin hole 11, the first locking pin 24 and the second locking pin 25 on the positioning pin 21 will extend from the bracket hole 51 of the recovery locking pin bracket 50 and enter the gap between the recovery locking pin bracket 50 and the RAT locking pin hole 11.

[0100] exist Figure 9 In the structure of the bend 30 shown, two first locking blocks 33 and two second locking blocks 34 arranged at a distance of 180° from each other are formed on the first end 31. Furthermore, the first locking blocks 33 and the second locking blocks 34 are arranged at intervals, and adjacent first locking blocks 33 and second locking blocks 34 are preferably spaced 90° apart.

[0101] from Figure 9 and 10 As can be seen, on the first end 31 of the bend 30, two first locking blocks 33 are respectively formed on one side of each of the two first grooves 35. For example, the two first locking blocks 33 are respectively located on one side of the two first grooves 35 in the clockwise direction. In this way, when it is necessary to remove the retrieval lock pin 20, by rotating the retrieval lock pin 20 in the clockwise direction, the first locking pin 24 and the second locking pin 25 can be aligned with their respective first grooves 35, thereby allowing the positioning pin 21 to be pulled out. Moreover, when the retrieval lock pin 20 is rotated to the position where the first locking pin 24 and the second locking pin 25 collide with the first locking blocks 33, the collision with the first locking blocks 33 indicates to the operator that the first locking pin 24 and the second locking pin 25 have been rotated to their position with the first grooves 35, so that the operator knows that the retrieval lock pin 20 can be pulled outward to remove the retrieval lock pin 20 from RAT 1.

Claims

1. A RAT (Rapid Access Control) accidental release prevention device, the RAT accidental release prevention device comprising: A recyclable locking pin, the recyclable locking pin including a positioning pin, a handle, and a flexible cable connecting the positioning pin and the handle; A bend includes a first end, a second end, and a channel formed within the bend, the channel extending from the first end to the second end, and a locating pin capable of being inserted into the channel from the second end of the bend and extending from the first end; as well as A recycling lock pin bracket is provided with a bracket hole, and at least the first end of the bent pipe is supported in the bracket hole; The feature is that at least one locking pin is provided on the positioning pin, and at least one first groove is formed on the inner surface of the channel. When the positioning pin is in the channel, the locking pin engages in the first groove. When the positioning pin moves to a position where the locking pin leaves the bend from the first end, the retraction locking pin can rotate relative to the bend, so that the locking pin abuts against the first end to prevent the retraction locking pin from being pulled back. The bend is made of a plastically deformable material.

2. The RAT accidental release prevention device as described in claim 1, characterized in that, At least one locking pin is provided at least at the first end of the bend and at least one location within the bracket hole.

3. The RAT accidental release prevention device as described in claim 2, characterized in that, A circumferentially extending groove is formed in the bracket hole, and at least one locking pin is provided in the circumferential groove.

4. The RAT accidental release prevention device as described in claim 2, characterized in that, The at least one locking pin is formed on the end face of the first end of the bend.

5. The RAT accidental release prevention device as described in claim 4, characterized in that, The at least one locking pin block includes a first locking pin block, which is disposed adjacent to the first groove.

6. The RAT accidental release prevention device as described in claim 5, characterized in that, The at least one locking block further includes a second locking block, which is disposed at a third angle apart from the first locking block.

7. The RAT accidental release prevention device as described in claim 1, characterized in that, An outer flange is formed on the outer surface of the bent tube at a position corresponding to the first groove, and a second groove is formed in the bracket hole of the recycling lock pin bracket, the shape of the second groove being configured such that the outer flange can fit into the second groove.

8. The RAT accidental release prevention device as described in claim 1, characterized in that, The flexible cable is a steel cable.

9. The RAT accidental release prevention device as described in claim 1, characterized in that, Two locking pins, namely a first locking pin and a second locking pin, are provided on the recycling locking pin. The first locking pin and the second locking pin are spaced apart at a first angle, and two first grooves are provided in the bend tube, which are spaced apart at a second angle. The first angle and the second angle are equal.

10. An aircraft comprising a RAT, characterized in that, The aircraft further includes a RAT accidental release prevention device as described in any one of claims 1 to 9, wherein the RAT includes a RAT locking pin hole, and the positioning pin can be inserted into the RAT locking pin hole to lock the RAT in the recovery position.

11. The aircraft as claimed in claim 10, characterized in that, The recovery lock pin bracket is fixedly installed on the fuselage of the aircraft. The radius of the lock pin is 1mm, and the distance between the recovery lock pin bracket and the RAT lock pin hole is greater than 4mm.

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