Emergency unlocking device

Abstract

The present invention provides an emergency unlocking device, which relates to the field of aviation technology. The device comprises an ejection assembly, a drive assembly, and a lock hook assembly. The ejection assembly comprises an ejection member and a housing, wherein the ejection member is adapted to be pressed into or ejected from the housing. The drive assembly comprises a memory alloy wire. The lock hook assembly comprises a limit lock hook and a limit dial block. One end of the memory alloy wire is mounted on the limit dial block, and the other end is mounted on the housing. The limit dial block and the limit lock hook are respectively rotatably connected to the housing. The limit lock hook is adapted to abut against the ejection member to restrict the ejection member from ejecting, and the limit dial block is adapted to abut against the limit lock hook to restrict the rotation of the limit lock hook. The emergency unlocking device uses the memory alloy wire as a trigger element. When unlocking is required, pressing a switch energizes and heats the alloy wire. The alloy wire preheats and contracts, driving other mechanisms to unlock. After unlocking, the lock hook assembly can also be reset, making it reusable.

Description

Technical Field

[0001] The present invention relates to the field of aviation technology, and in particular to an emergency unlocking device. Background Art

[0002] Helicopters and other aircraft are often equipped with emergency release mechanisms to facilitate the release of cargo, for example, in emergencies. Currently, these release mechanisms are typically powered by a projectile. In an emergency, the projectile's internal explosives are detonated, pushing the push pin to unlock the vehicle. However, this release method is highly impactful and can damage other components, making it difficult to reuse and store. Summary of the Invention

[0003] The problem solved by the present invention is how to reduce the unlocking impact and avoid the danger caused by explosive devices such as projectiles.

[0004] In order to solve the above problems, the present invention provides an emergency unlocking device, comprising:

[0005] An ejection assembly, the ejection assembly comprising an ejection member and a housing, the ejection member being adapted to be pressed into or ejected from the housing;

[0006] A drive assembly, the drive assembly comprising a memory alloy wire, the memory alloy wire being adapted to extend or shorten;

[0007] The lock hook assembly includes a limit lock hook and a limit shift block, one end of the memory alloy wire is mounted on the limit shift block, and the other end is mounted on the shell, the limit shift block and the limit lock hook are respectively rotatably connected to the shell, the limit lock hook is suitable for abutting against the ejection part to limit the ejection part from popping out, and the limit shift block is suitable for abutting against the limit lock hook to limit the rotation of the limit lock hook.

[0008] Optionally, the ejection member includes a sleeve and a first elastic member, one end of the first elastic member is connected to the sleeve, and the other end is connected to the shell, a first limiting block is provided on the side of the sleeve facing the limiting lock hook, and a first limiting groove is provided on the limiting lock hook, and the first limiting block is suitable for being clamped in the first limiting groove.

[0009] Optionally, the sleeve is further provided with a slider, the housing is further provided with a slideway, and the slider is slidably connected to the slideway.

[0010] Optionally, a second limiting groove is provided on one end of the limiting block away from the memory alloy wire, one end of the limiting lock hook is rotatably connected to the shell, and the other end of the limiting lock hook is suitable for abutting against the second limiting groove.

[0011] Optionally, the locking hook assembly further includes a second elastic member, one end of the second elastic member is connected to the limiting locking hook, and the other end is connected to the shell.

[0012] Optionally, the locking hook assembly further includes a third elastic member, one end of the third elastic member is connected to the limiting block, and the other end is connected to the shell.

[0013] Optionally, the driving assembly further includes a pulley, and the memory alloy wire is wound around the pulley.

[0014] Optionally, the drive assembly includes at least two memory alloy wires.

[0015] Optionally, the housing is further provided with a plug, and both ends of the memory alloy wire are electrically connected to the plug respectively.

[0016] Optionally, the driving assembly further comprises a fixing seat, and the fixing seat and the limiting shift block are respectively provided with insulating sleeves, and both ends of the memory alloy wire are respectively connected to the limiting shift block and the fixing seat through the insulating sleeves.

[0017] The emergency unlocking device of the present invention enables the limit shift block to rotate in a clockwise direction, for example, under a relatively small external elastic force when the memory alloy wire is in an extended state, thereby abutting against the limit lock hook, limiting the rotation of the limit lock hook, and further enabling the limit lock hook to abut against the ejection member, so that the ejection member is pressed into the shell and has a certain pre-tightening force, thereby realizing the locking of the emergency unlocking device; when the memory alloy wire of the emergency unlocking device is in a shortened state, the memory alloy wire pulls the limit shift block to rotate in a counterclockwise direction, for example, to release the abutment limit on the limit lock hook, thereby enabling the ejection member to be ejected from the shell without being limited by the limit lock hook, thereby realizing the rapid unlocking of the emergency unlocking device; and Moreover, when the memory alloy wire pulls the limit shift block, due to the lever principle (for example, the limit shift block is used as a fulcrum with the hinge point between the limit shift block and the shell; the limit lock hook is used as a fulcrum with the hinge point between the limit lock hook and the shell, and the limit lock hook is used as a lever), the emergency unlocking device reduces the pulling force requirement for the memory alloy wire while ensuring a large pre-tightening force of the ejection part (that is, a better unlocking effect), and can make the pulling force of the memory alloy wire reach the required unlocking size more quickly (that is, achieve rapid unlocking); in addition, compared with the method of unlocking and releasing by using pyrotechnics such as projectiles, the unlocking impact of the emergency unlocking device is smaller, and it can be reused, which is convenient for storage and maintenance, and reduces pollution to the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic cross-sectional view of an emergency unlocking device in a locked state provided by an embodiment of the present invention;

[0019] Figure 2A schematic cross-sectional view of an emergency unlocking device in an unlocked state provided by an embodiment of the present invention;

[0020] Figure 3 A three-dimensional schematic diagram of a position-limiting lock hook provided in an embodiment of the present invention;

[0021] Figure 4 A three-dimensional schematic diagram of a limit shift block provided in an embodiment of the present invention.

[0022] Description of reference numerals:

[0023] 1. Ejection assembly; 11. Ejection member; 111. First elastic member; 112. Sleeve; 1121. Slider; 1122. First limiting block; 1123. Sealing ring; 12. Housing; 121. Slideway; 122. Spring mounting seat; 123. Plug; 2. Drive assembly; 21. Memory alloy wire; 22. Pulley; 23. Fixed seat; 231. Insulating sleeve; 3. Lock hook assembly; 31. Limiting lock hook; 311. First limiting groove; 312. Lock hook hinge hole; 313. Limiting end; 32. Limiting shift block; 321. Second limiting groove; 322. Shift block hinge hole; 323. Memory alloy wire mounting hole; 33. Second elastic member; 34. Third elastic member. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0025] It should be noted that in the coordinate system XYZ provided herein, the positive direction of the X axis represents the right, the negative direction of the X axis represents the left, the positive direction of the Y axis represents the back, the negative direction of the Y axis represents the front, the positive direction of the Z axis represents the top, and the negative direction of the Z axis represents the bottom. At the same time, it should be noted that the terms "first", "second", etc. in the specification and claims of the present invention 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 present invention described herein can be implemented in an order other than those illustrated or described herein.

[0026] An embodiment of the present invention provides an emergency unlocking device, comprising: an ejection assembly 1, a drive assembly 2 and a lock hook assembly 3, wherein the ejection assembly 1 comprises an ejection part 11 and a shell 12, and the ejection part 11 is suitable for being pressed into or popped out of the shell 12; the drive assembly 2 comprises a memory alloy wire 21, and the memory alloy wire 21 is suitable for being extended or shortened; the lock hook assembly 3 comprises a limit lock hook 31 and a limit shift block 32, one end of the memory alloy wire 21 is mounted on the limit shift block 32, and the other end is mounted on the shell 12, the limit shift block 32 and the limit lock hook 31 are respectively rotatably connected to the shell 12, the limit lock hook 31 is suitable for abutting against the ejection part 11 to limit the ejection part 11 from popping out, and the limit shift block 32 is suitable for abutting against the limit lock hook 31 to limit the rotation of the limit lock hook 31.

[0027] Specifically, combined Figure 1 and Figure 2 As shown, the ejection member 11 can be pressed in or ejected from the shell 12 along the X-axis direction in the figure, the limit lock hook 31 and the limit shift block 32 are respectively hinged on the shell 12, and the memory alloy wire 21 has the characteristic of producing metal phase change as the temperature changes, that is, it can be extended or shortened.

[0028] For example, in combination Figure 1 As shown, when the emergency unlocking device is in the locked state, the memory alloy wire is in an extended state, the ejection member 11 is pressed into the housing 12, the limit lock hook 31 abuts against the ejection member 11 to limit the ejection member 11, and the lower end of the limit dial block 32 (i.e., the end in the opposite direction of the Z axis in the figure) abuts against the right end of the limit lock hook 31 (i.e., the end in the positive direction of the X axis in the figure), thereby limiting the rotation of the limit lock hook 31; combined with Figure 2 As shown, when the emergency unlocking device is in the unlocked state, the memory alloy wire 21 is in a shortened state due to the heat caused by the power supply. The shortening of the memory alloy wire causes the limit block 32 to be pulled and rotate counterclockwise in the figure. The limit lock hook 31 is no longer abutted by the limit lock hook 32, so the limit lock hook 31 can rotate counterclockwise in the figure, thereby causing the ejection part 11 to no longer be abutted by the limit lock hook 31, causing the ejection part 11 to pop out of the shell 12.

[0029] The lock 12 of the emergency unlocking device is unlocked when the memory alloy wire 21 is in the extended state. The limit shift block 32 can rotate in a clockwise direction, for example, under a small external elastic force, thereby abutting the limit lock hook 31, limiting the rotation of the limit lock hook 31, and then causing the limit lock hook 31 to abut against the ejection member 11, so that the ejection member 11 is pressed into the shell 12 and has a certain pre-tightening force, thereby achieving the locking of the emergency unlocking device; when the memory alloy wire 21 of the emergency unlocking device is in the shortened state, the memory alloy wire 21 pulls the limit shift block 32 to rotate in a counterclockwise direction, for example, to release its abutment limit on the limit lock hook 31, thereby causing the ejection member 11 to be no longer limited by the limit lock hook 31 and eject from the shell 12, thereby achieving the quick release of the emergency unlocking device. Quick unlocking; and, when the memory alloy wire 21 pulls the limit shift block 32, due to the lever principle (for example, the hinge point of the limit shift block 32 and the shell 12 is used as a fulcrum, and the limit shift block 32 is used as a lever; the hinge point of the limit lock hook 31 and the shell 12 is used as a fulcrum, and the limit lock hook 31 is used as a lever), the emergency unlocking device reduces the tension requirement for the memory alloy wire 21 while ensuring that the preload force of the ejection member 11 is large (that is, the unlocking effect is better), and can make the tension of the memory alloy wire 21 reach the required size for unlocking more quickly (that is, achieve quick unlocking); in addition, compared with the method of unlocking and releasing by using pyrotechnics such as projectiles, the unlocking impact of the emergency unlocking device is small, and it can be reused, which is easy to store and maintain, and reduces pollution to the environment.

[0030] Optionally, the ejection member 11 includes a sleeve 112 and a first elastic member 111, one end of the first elastic member 111 is connected to the sleeve 112, and the other end is connected to the shell 12, and a first limiting block 1122 is provided on the side of the sleeve 112 facing the limiting lock hook 31, and a first limiting groove 311 is provided on the limiting lock hook 31, and the first limiting block 1122 is suitable for being clamped in the first limiting groove 311.

[0031] Specifically, combined Figures 1 to 3 As shown, the sleeve 112 is integrally connected to the first limit block 1122. When the emergency unlocking device is locked, the inner wall surface of the first limit groove 311 and the outer wall surface of the first limit block 1122 abut against each other, so that the sleeve 112 is pressed into the shell 12 for limitation; when the emergency unlocking device is unlocked, the limit lock hook 31 rotates counterclockwise in the figure, and the right inner wall of the first limit groove 311 (that is, the inner wall on the positive side of the X-axis in the figure) no longer abuts against the first limit block 1122, and the sleeve 112 can pop out of the shell 12 along the X-axis direction in the figure.

[0032] For example, in combination Figures 1 to 2As shown, the right end of the sleeve 112 (i.e., the end along the positive direction of the X-axis in the figure) is provided with a sealing ring 1123 to seal and protect the parts inside the emergency unlocking device. The first elastic member 111 can be a rectangular spring, which is located inside the sleeve 112 and one end abuts against the right inner wall of the sleeve 112 (i.e., the inner wall on the side of the positive direction of the X-axis in the figure), and the other end is provided on the spring mounting seat 122 of the shell 12, wherein the spring mounting seat 122 can also be connected to the shell 12 by a fastener.

[0033] In this way, the limiting lock hook 31 realizes the abutment limitation of the sleeve 112 by engaging with the first limiting groove 311 and the first limiting block 1122, so that the limiting lock hook 31 shares the pre-tightening force of the ejection part 11 (that is, the pre-tightening force generated by the pre-compression of the first elastic part 111) to a certain extent, further reducing the tension requirement for the memory alloy wire 21, thereby facilitating rapid unlocking.

[0034] Optionally, a slider 1121 is further provided on the sleeve 112 , and a slideway 121 is further provided on the housing 12 , and the slider 1121 is slidably connected to the slideway 121 .

[0035] Specifically, combined Figure 1 As shown, the emergency unlocking device is in a locked state, the first limit block 1122 on the sleeve 112 is abutted and limited by the limit lock hook 31, and the slider 1121 integrally connected to the sleeve 112 is stationary relative to the slide 121; Figure 2 As shown, the emergency unlocking device is in the unlocked state, the limit lock hook 31 rotates counterclockwise in the figure and no longer abuts the first limit block 1122, the elastic potential energy of the first elastic member 111 is converted into kinetic energy and then pushes the sleeve 112 in the positive direction of the X-axis, and the slide 121 is consistent with the direction of the X-axis in the figure, so the slider 1121 and the sleeve 112 both move in the positive direction of the X-axis in the figure.

[0036] In this way, the slider 1121 and the slide 121 provide guidance for the ejection member 11 when it ejects from the housing 12, thereby improving the accuracy of the ejection member 11 so as to cooperate with a device such as a firing hook of a helicopter to achieve rapid unlocking.

[0037] Optionally, a second limiting groove 321 is provided on the end of the limiting block 32 away from the memory alloy wire 21, one end of the limiting lock hook 31 is rotatably connected to the shell 12, and the other end of the limiting lock hook 31 is suitable for abutting against the second limiting groove 321.

[0038] Specifically, combined Figures 1 to 4When the locking cam 32 is in the unlocking state, the locking cam 321 is locked and the locking cam 322 is locked, so that the locking cam 321 is locked.

[0039] In this way, when the emergency unlocking device is locked, the second limiting groove 321 abuts against the limiting lock hook 31 so that force can be transmitted between the limiting shift block 32 and the limiting lock hook 31, and the rotation connection points of the limiting shift block 32 and the limiting lock hook 31 with the shell 12 are used as fulcrums, thereby reducing the tension requirement for the memory alloy wire 21 and facilitating rapid unlocking when the emergency unlocking device is unlocked.

[0040] Optionally, the lock hook assembly 3 further includes a second elastic member 33 , one end of the second elastic member 33 is connected to the limiting lock hook 31 , and the other end is connected to the housing 12 .

[0041] Specifically, combined Figure 1 and Figure 2 As shown, the second elastic member 33 can be a tension spring, one end of which is mounted on the housing 12 , and the other end is mounted on the limit lock hook 31 along the positive direction of the X axis in the figure.

[0042] In this way, when the emergency unlocking device is locked, as the limit lock hook 31 is limited by the limit shift block 32, the second elastic member 33 is pre-stretched; when the emergency unlocking device is unlocked, the limit lock hook 31 is no longer limited, and the elastic potential energy of the second elastic member 33 is converted into kinetic energy to make the limit lock hook 31 rotate more quickly, so that the ejection member 11 is unlocked and ejected, further improving the unlocking speed.

[0043] Optionally, the locking hook assembly 3 further includes a third elastic member 34 , one end of the third elastic member 34 is connected to the limiting block 32 , and the other end is connected to the housing 12 .

[0044] Specifically, combined Figure 1 and Figure 2As shown, the third elastic member 34 can be a compression spring, one end of which is fixed to the housing 12 through a spring mounting seat, and the other end is mounted on the lower end of the limit block 32 (i.e., the end in the opposite direction of the Z axis in the figure).

[0045] In this way, when the emergency unlocking device is unlocked, the limit shift block 32 is pulled by the memory alloy wire 21 and rotates (for example, rotates counterclockwise), so that the third elastic member 34 is pre-compressed; when the emergency unlocking device is locked again, the memory alloy wire 21 stretches, and the elastic potential energy of the third elastic member 34 is converted into kinetic energy (that is, forming the external elastic force mentioned above) to make the limit shift block 32 rotate in the opposite direction relative to when it was unlocked (for example, rotates clockwise), so that the limit shift block 32 abuts against the limit lock hook 31 again, which facilitates the reset of the limit shift block 32 when the emergency unlocking device is locked, and further facilitates the reuse of the emergency unlocking device.

[0046] Optionally, the driving assembly 2 further includes a pulley 22 , and the memory alloy wire 21 is wound around the pulley 22 .

[0047] For example, in combination Figure 1 and Figure 2 As shown, the pulley 22 is made of insulating material, which is installed on the shell 12 and is located on the left side of the limit block 32 and the fixed seat 23 (to be introduced later) to reduce the lateral size of the emergency unlocking device (that is, the size in the X-axis direction in the figure), and the memory alloy wire 21 is wound around the pulley 22.

[0048] In this way, the memory alloy wire 21 is wound around the pulley 22 so that both ends of the memory alloy wire 21 face the same direction (for example, both face the positive direction of the X-axis in the figure) so as to connect to the power supply; and the memory alloy wire 21 can be tensioned by the pulley 22, reducing the shortening time of the memory alloy wire 21 and further improving the unlocking speed.

[0049] Optionally, the driving assembly 2 includes at least two memory alloy wires 21 .

[0050] Specifically, combined Figure 1 and Figure 2 As shown, two memory alloy wires 21 are wound around a pulley 22. The ends of the memory alloy wires 21 are respectively connected to a fixing base 23 (described later) and a limit block 32. The ends of the two memory alloy wires 21 are both connected to a power source. The arrangement of more than two memory alloy wires 21 is similar and will not be further described here.

[0051] In this way, by providing at least two memory alloy wires 21 , a redundant design is achieved, thereby ensuring the safety and reliability of the emergency unlocking device, and further ensuring the safety and reliability of the aircraft.

[0052] Optionally, a plug 123 is further provided on the housing 12 , and both ends of the memory alloy wire 21 are electrically connected to the plug 123 respectively.

[0053] For example, in combination Figure 1 and Figure 2 As shown, the plug 123 can be a four-core aviation plug that is electrically connected to the four ends of the two memory alloy wires 21 respectively.

[0054] In this way, by providing a plug 123 (such as a four-core aviation plug) electrically connected to both ends of the memory alloy wire 21 on the housing 12, it is suitable for circuit connection of aircraft such as helicopters.

[0055] Optionally, the driving assembly 2 further includes a fixing seat 23 , and an insulating sleeve 231 is provided on the fixing seat 23 and the limiting block 32 respectively, and both ends of the memory alloy wire 21 are connected to the limiting block 32 and the fixing seat 23 respectively through the insulating sleeve 231 .

[0056] Specifically, combined Figure 1 、 Figure 2 and Figure 4 As shown, a fixing base 23 is mounted on the housing 12 to secure one end of the memory alloy wire 21. Insulating sleeves 231 are provided on the fixing base 23 and the limiter block 32, respectively. This insulates the memory alloy wire 21 from the fixing base 23, the limiter block 32, and the housing 12, preventing short circuits in the circuit path where the memory alloy wire 21 resides. This ensures the safety and reliability of the emergency release device, and ultimately the aircraft.

[0057] Although the present disclosure is disclosed as above, the protection scope of the present disclosure is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present disclosure, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. An emergency unlocking device, characterized in that: include: An ejection assembly (1), the ejection assembly (1) comprising an ejection member (11) and a housing (12), the ejection member (11) being adapted to be pressed into or ejected from the housing (12); A drive assembly (2), the drive assembly (2) comprising a memory alloy wire (21), the memory alloy wire (21) being adapted to be extended or shortened; A lock hook assembly (3), wherein the lock hook assembly (3) includes a limit lock hook (31) and a limit shift block (32), one end of the memory alloy wire (21) is mounted on the limit shift block (32), and the other end is mounted on the shell (12), the limit shift block (32) and the limit lock hook (31) are respectively rotatably connected to the shell (12), the limit lock hook (31) is suitable for abutting against the ejection part (11) to limit the ejection part (11) from popping out, and the limit shift block (32) is suitable for abutting against the limit lock hook (31) to limit the rotation of the limit lock hook (31); the ejection part (11) includes a sleeve (112) and a first elastic part (111), the first One end of the elastic member (111) is connected to the sleeve (112), and the other end is connected to the housing (12); a first limiting block (1122) is provided on the side of the sleeve (112) facing the limiting lock hook (31); a first limiting groove (311) is provided on the limiting lock hook (31); the first limiting block (1122) is suitable for being snapped into the first limiting groove (311); a second limiting groove (321) is provided on the end of the limiting block (32) away from the memory alloy wire (21); one end of the limiting lock hook (31) is rotatably connected to the housing (12), and the other end of the limiting lock hook (31) is suitable for abutting against the second limiting groove (321).

2. The emergency unlocking device according to claim 1, characterized in that: A slider (1121) is further provided on the sleeve (112), and a slideway (121) is further provided on the housing (12), wherein the slider (1121) is slidably connected to the slideway (121).

3. The emergency unlocking device according to claim 1, characterized in that: The locking hook assembly (3) further comprises a second elastic member (33), one end of the second elastic member (33) being connected to the position-limiting locking hook (31) and the other end being connected to the housing (12).

4. The emergency unlocking device according to claim 1, characterized in that: The locking hook assembly (3) further comprises a third elastic member (34), one end of the third elastic member (34) being connected to the limiting shift block (32) and the other end being connected to the housing (12).

5. The emergency unlocking device according to claim 1, characterized in that: The driving assembly (2) further comprises a pulley (22), and the memory alloy wire (21) is wound around the pulley (22).

6. The emergency unlocking device according to claim 1, characterized in that: The driving assembly (2) comprises at least two memory alloy wires (21).

7. The emergency unlocking device according to claim 6, characterized in that: The housing (12) is further provided with a plug (123), and both ends of the memory alloy wire (21) are electrically connected to the plug (123) respectively.

8. The emergency unlocking device according to claim 1, characterized in that: The driving assembly (2) further comprises a fixing seat (23), wherein the fixing seat (23) and the limiting shifting block (32) are respectively provided with an insulating sleeve (231), and the two ends of the memory alloy wire (21) are respectively connected to the limiting shifting block (32) and the fixing seat (23) through the insulating sleeve (231).

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