Assembling and pressurizing structure of cutting cord for shattering canopy

Abstract

An assembling and pressurizing structure of a cutting cord for shattering a canopy, adapted to assembling and pressurized curing of cutting cords on curved materials such as aircraft canopies, and comprising a pressurizing magnet (1), a pressurizing rubber block (2), and an attracting magnet (5). The pressurizing rubber block (2) is arranged on the side of the pressurizing magnet (1) facing the pressurizing rubber block (2), and the pressurizing rubber block (2) is provided with a recess for containing a cutting cord assembly (6); the pressurizing magnet (1) and the attracting magnet (5) are used for sandwiching a canopy curved surface (8), and the pressurizing magnet (1) and the attracting magnet (5) attract each other so that the cutting core assembly (6) and the canopy curved surface (8) abut against each other. The assembling and pressurizing structure solves the problem of incomplete pressurized curing during assembling of cutting cords on curved materials such as aircraft canopies, thereby improving the reliability of canopy shattering systems.

Description

An assembly and pressurizing structure for cutting cables used to rupture a canopy

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on December 22, 2023, with application number 202311776213.9 and application name “A kind of assembly pressurization structure for cutting rope for rupturing the cockpit cover”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of cutting cable installation, and in particular to an assembly and pressurization structure of a cutting cable for rupturing a canopy. Background Art

[0003] With the development of aircraft performance, the strength of the materials used in aircraft canopies has become increasingly stronger, thus placing higher demands on the separation capability of the cutting cables used to rupture the canopy. The material of the cutting cable liner directly affects the forming and armor-piercing power of the cutting cable. Currently, the softer lead cutting cables have been used for rupturing aircraft canopies. This is easier to bend on curved materials such as the canopy, and pressure is applied by manually applying adhesive tape. Currently, silver and copper cutting cables with stronger separation capabilities are harder than lead cutting cables. Using traditional pressure-applying methods, they cannot fully pressurize curved materials such as the canopy. This can cause severe warping at corners and insufficient pressure, leading to rebound and debonding of the cutting cables. This greatly affects the assembly quality and separation reliability of the cutting cables.

[0004] Summary of the Invention

[0005] This application provides a pressurized assembly structure for a canopy rupture cutting cable, suitable for assembling and pressurizing the cutting cable on curved surfaces, such as aircraft canopies. This invention effectively addresses the accuracy and stability issues associated with pressurizing the cutting cable on curved surfaces, such as aircraft canopies, and improves the reliability of the canopy rupture system.

[0006] In a first aspect, a pressurized assembly structure for a cutting cable for rupturing a canopy is provided, comprising a pressurized magnet, a pressurized rubber block, and an attracting magnet; the pressurized rubber block is arranged on a side of the pressurized magnet facing the pressurized rubber block, and the pressurized rubber block has a groove for accommodating a cutting cable assembly; a canopy curved surface is sandwiched between the pressurized magnet and the attracting magnet, and the pressurized magnet and the attracting magnet attract each other so that the cutting cable assembly and the canopy curved surface are pressed against each other.

[0007] In combination with the first aspect, in certain implementations of the first aspect, a layer of pressurized rubber pad is pre-vulcanized on the side of the pressurized magnet facing the attracting magnet, and then rubber suction cups are evenly distributed, and the rubber suction cups are used to pre-tighten the cutting rope assembly on the curved surface of the canopy.

[0008] In combination with the first aspect, in certain implementations of the first aspect, a layer of attraction rubber pad is vulcanized on the attraction magnet to isolate the direct hard contact between the canopy curved surface and the attraction magnet.

[0009] In combination with the first aspect, in some implementations of the first aspect, the attraction magnet is further provided with a magnetic conversion switch, and the magnetic conversion switch is used to switch the magnetic state between the pressure magnet and the attraction magnet.

[0010] In combination with the first aspect, in certain implementations of the first aspect, the attraction magnet includes a central cylindrical magnet and two symmetrically arranged cast irons, the two cast irons are symmetrically arranged on both sides of the central cylindrical magnet, the north and south pole directions of the central cylindrical magnet are arranged radially, and the cast iron magnetic conversion switch is used to axially rotate the central cylindrical magnet to change the direction of the magnetic lines of force generated by the central cylindrical magnet.

[0011] In combination with the first aspect, in certain implementations of the first aspect, when the central cylindrical magnet is rotated so that the north and south pole directions are perpendicular to the canopy curved surface, it is in a magnetically closed state; when the central cylindrical magnet is rotated so that the north and south pole directions are parallel to the canopy curved surface, it is in a magnetically open state.

[0012] In combination with the first aspect, in certain implementations of the first aspect, the cutting cable assembly includes a heat shrink tube, a cutting cable, and a rubber sheath; the rubber sheath is wrapped around the outer periphery of the cutting cable to space the cutting cable and the transparent material of the canopy; the heat shrink tube is used to wrap around the outer periphery of the rubber sheath to achieve external protection and provide a flat adhesive area.

[0013] In combination with the first aspect, in certain implementations of the first aspect, the pressurizing magnet and the pressurizing rubber block are detachable.

[0014] In combination with the first aspect, in certain implementations of the first aspect, the pressurizing magnet is used to provide a pressurizing force of 10 kg to 40 kg per 200 mm.

[0015] In a second aspect, a method for using an assembly pressurization structure for a canopy rupture cutting cable is provided. The assembly pressurization structure includes a pressurization magnet, a pressurization rubber block, and an attraction magnet; the pressurization rubber block has a slot for accommodating a cutting cable assembly; the pressurization magnet has rubber suction cups evenly distributed on a side facing the attraction magnet; the attraction magnet is provided with a magnetic switching switch for switching the magnetic state between the pressurization magnet and the attraction magnet; the method includes:

[0016] Fixing a pressurized rubber block provided with a cutting cable assembly on a side of the pressurized magnet facing the pressurized rubber block;

[0017] Pre-pressing the pressurizing magnet onto the first side of the canopy curved surface via the rubber suction cup and adjusting the pressurizing magnet to a correct position;

[0018] Switch the magnetic conversion switch to the closed state, press the attraction magnet against the second side of the canopy curved surface and arrange it opposite to the pressure magnet, and after the installation position is determined, switch the magnetic conversion switch to the open state.

[0019] Compared with the existing technology, the solution provided by this application includes at least the following beneficial technical effects:

[0020] (1) Compared with conventional cutting cable assembly and pressurization structures, the present invention provides a cutting cable assembly and pressurization structure that can adapt to irregular curved materials, can be freely matched to different cutting cable sizes, can flexibly adjust the pressurization force, and is easy to disassemble. A replaceable pressurization rubber block on the pressurization magnet is used as a matching element for the cutting cable assembly, enabling rapid replacement and matching of cutting cable assemblies of different sizes. A rubber suction cup structure design on the pressurization rubber block enables pre-tightening of the cutting cable assembly on an irregular curved surface, allowing for convenient single-person, single-side operation.

[0021] (2) The attractive rubber pad design of the present invention effectively avoids direct contact between the hard metal magnet and the curved surface of the canopy, which may cause damage. The 4mm rubber design can fit tightly with the curved surface, increasing the pressurized force area.

[0022] (3) The magnetic conversion switch design of the magnet on the attracting magnet of the present invention can realize the convenient disassembly of the magnet after pressurization, avoiding the problem of relative displacement of the cutting rope assembly during hard disassembly due to excessive magnetic force, thereby affecting the assembly consistency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG1 is a simplified structural diagram of the present invention.

[0024] FIG2 is a schematic diagram of the structural installation of the present invention.

[0025] FIG3 is a schematic structural diagram of the cutting cable assembly of the present invention.

[0026] FIG4 is a schematic diagram of a rubber suction cup according to the present invention.

[0027] FIG5 is a schematic diagram showing the principle structure of an attracting magnet with a magnetic conversion switch.

[0028] FIG6 is a schematic diagram showing the principle structure of an attracting magnet with a magnetic conversion switch. DETAILED DESCRIPTION

[0029] The present application is described in further detail below with reference to the accompanying drawings and specific embodiments.

[0030] If an emergency occurs during the flight of an aircraft and the pilot needs to escape urgently, he or she will mainly rely on the cutting rope pre-deployed on the aircraft canopy to generate a high-temperature and high-pressure metal jet, which will instantly cut and separate the transparent material of the canopy above the pilot's head, providing an escape route for the pilot to eject from the cabin.

[0031] Because the cutting cable is pre-assembled and bonded to the canopy's transparent material with silicone rubber, the quality of its assembly directly impacts its ability to reliably cut and separate the canopy's transparent material. The cutting cable is bonded to the canopy's transparent material with silicone rubber. After application, the silicone rubber requires 48 hours of pressurization to cure and achieve a reliable bond. If the pressurization cure is incomplete after the cutting cable is bonded to the canopy's transparent material, severe warping of the cable's edges at the bends and the cable's rebound and debonding can occur. This can lead to the cable's explosion height being too high or the cable's jet direction deviating from the intended separation point, ultimately preventing the cutting cable from reliably separating the canopy's transparent material.

[0032] Therefore, the assembly pressurization structure of the cutting rope for canopy rupture is mainly used for the reliable pressurized solidification of the cutting rope on curved materials such as the canopy, ensuring that the assembly consistency of the cutting rope meets the requirements, and further ensuring that the cutting rope can reliably separate the transparent material of the canopy, providing protection for the lifeguard to eject from the cabin and escape.

[0033] As shown in Figures 1 and 2, the present invention provides a pressurized assembly structure for a canopy rupture cutting cable, comprising a pressurizing magnet 1, a pressurizing rubber block 2, and an attracting magnet 5. The pressurizing rubber block 2 can be positioned on the side of the pressurizing magnet 1 facing the pressurizing rubber block 2. The pressurizing rubber block 2 includes a slot for accommodating a cutting cable assembly 6. A canopy curved surface 8 is sandwiched between the pressurizing magnet 1 and the attracting magnet 5. The pressurizing magnet 1 and the attracting magnet 5 attract each other, causing the cutting cable assembly 6 and the canopy curved surface 8 to press against each other.

[0034] The specifications of the pressurizing magnet 1 and the attracting magnet 5 can be determined according to the required pressurizing force. The pressurizing magnet 1 can provide a pressurizing force of 10kg to 40kg per 200mm according to actual needs. The actual pressurizing length and pressurizing force can be adjusted according to needs. The pressurizing magnet 1 and the pressurizing rubber block 2 can be easily assembled, disassembled and replaced. The pressurizing rubber block 2 can be matched with cutting rope components 6 of different external dimensions to ensure a comprehensive fit and uniform force, without the need to vulcanize pressurizing rubber blocks 2 of different specifications on each pressurizing magnet 1. The pressurizing rubber block 2 is made of nitrile rubber.

[0035] As shown in Figure 3, the cutting rope assembly 6 of the present invention may include a heat shrink tube 10, a cutting rope 11, and a rubber sheath 12. The liner material and charge amount of the cutting rope 11 are determined according to the difference in thickness and strength of the material of the object to be separated, such as lead cutting rope, silver cutting rope, copper cutting rope or aluminum cutting rope, etc. The explosives in the cutting rope may be hexanitroquinone, hexanitrostilbene, octogenol, etc., and the linear density can be selected according to demand. The harder the liner material, the greater the required pressure. The rubber sheath 12 and the heat shrink tube 10 are used to protect the cutting rope 11. The size is determined according to the outer dimensions of the cutting rope 11, and the size directly affects the matching size of the pressurized rubber block 2. The material of the rubber sheath 12 can be selected from nitrile rubber or silicone rubber, etc.

[0036] The cutting cable 11 is primarily used to generate a high-temperature, high-pressure metal jet upon explosion, effectively cutting and separating the canopy's transparent material. Since the metal jet formed upon the explosion of the cutting cable 11 requires a certain amount of space to reach its maximum velocity, achieving the highest cutting and separating capability, the rubber sheath 12 not only wraps the cutting cable to reduce the explosive impact force generated by the cutting cable after operation but also controls the distance between the cutting cable and the canopy's transparent material, thereby controlling the cable's explosion height to ensure the required separation capability. The heat shrink tubing 10 is primarily used for external protection after the cutting cable 11 and rubber sheath 12 are assembled. Formed as a single piece, the heat shrink tubing increases the bonding contact area between the cutting cable assembly 6 and the canopy's curved surface 8, ensuring a more secure bond and improved environmental resistance. This prevents the cutting cable assembly 6 from becoming loose or debonded after navigating the aircraft's turbulent and vibrating environment, ultimately preventing the cutting cable assembly 6 from properly separating the canopy's curved surface 8.

[0037] In some embodiments, a pre-vulcanized layer of pressurized rubber pad 3 can be applied to the side of the pressurizing magnet 1 facing the attracting magnet 5, and rubber suction cups 7 can be evenly distributed to ensure that the pressurizing magnet can be aligned and pre-compressed against the canopy curved surface 8. As shown in Figure 4, the rubber suction cups 7 of the present invention are made of nitrile rubber, and their specific dimensions are designed based on actual needs. The presence of the rubber suction cups 7 on the pressurizing magnet 1 allows for convenient, single-sided operation by a single person, eliminating the need for two people to simultaneously operate on both sides of the curved surface. After determining the exact pressurization position of all cutting cable assemblies to be pressurized, the rubber suction cups 7 are used to pre-tighten and pressurize them to ensure accurate pressurization.

[0038] In some embodiments, a layer of attraction rubber pad 4 can be vulcanized onto the attraction magnet 5 to isolate the canopy curved surface 8 from direct, hard contact with the attraction magnet 5, thereby preventing damage to the canopy. The attraction rubber pad itself has a certain degree of compressibility, ensuring that the attraction magnet 5 is fully in contact with the canopy curved surface 8. The thickness of the attraction rubber pad 4 is related to the applied pressure and the curvature of the curved surface. The main material of the attraction rubber pad 4 is nitrile rubber.

[0039] In some embodiments, the attraction magnet 5 may also be provided with a magnetic conversion switch 9 to facilitate the removal of the magnet after pressurization is completed, thereby avoiding the situation where the cutting rope assembly is relatively displaced during hard disassembly due to excessive magnetic force, thereby affecting the assembly consistency.

[0040] Figures 5 and 6 illustrate the schematic structure of the attracting magnet 5 with a magnetic switch 9. Figure 5 shows the magnetically closed state, while Figure 6 shows the magnetically open state. The attracting magnet 5 may include cast iron 13, copper sheet 14, and a central cylindrical magnet 15. The magnetic switch 9 can be used to rotate the central cylindrical magnet 15 to change the direction of the magnetic lines of force 16 generated by the central cylindrical magnet 15.

[0041] When the central cylindrical magnet 15 is rotated so that its north and south poles are perpendicular to the copper sheet, the magnetic lines of force generated by the north and south poles form a complete magnetic loop with the cast iron on both sides, resulting in a state of no magnetism at the top and bottom, which is now a magnetically closed state. When the central cylindrical magnet 15 is rotated so that its north and south poles are parallel to the copper sheet, the magnetic lines of force generated by the north and south poles bypass the copper sheet and the cast iron on both sides, forming a complete magnetic loop, resulting in a state of magnetism at the top and bottom, which is now a magnetically open state. The magnetic switching switch 9 thus enables the magnetic on and off of the attracting magnet 5.

[0042] During use, the magnetic switch 9 can be switched off, and the rubber suction cup 7 pre-compresses the pressure magnet 1, pressure rubber block 2, and cutting cable assembly 6 against the canopy's curved surface 8. The relatively low pre-compression force facilitates quick position adjustment. After the installation position is determined, the magnetic switch 9 is switched on to increase the pressing force between the pressure magnet 1 and the attraction magnet 5, ensuring that the cutting cable assembly 6 is securely pressed against the canopy's curved surface 8.

[0043] Although the present invention is disclosed above in terms of preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined by the claims of the present invention.

Claims

1. An assembly pressurizing structure for a cutting cable used for a cockpit canopy rupture, characterized in that, It includes a pressing magnet (1), a pressing rubber block (2), and an attracting magnet (5); the pressing rubber block (2) is arranged on the side of the pressing magnet (1) facing the pressing rubber block (2), and the pressing rubber block (2) has a groove for accommodating a cutting cable assembly (6); between the pressing magnet (1) and the attracting magnet (5) is used to clamp a cockpit canopy surface (8), and the mutual attraction between the pressing magnet (1) and the attracting magnet (5) makes the cutting cable assembly (6) and the cockpit canopy surface (8) press against each other.

2. The assembly pressurizing structure according to claim 1, characterized in that, On the side of the pressing magnet (1) facing the attracting magnet (5), a pressing rubber pad (3) is vulcanized in advance, and then rubber suction cups (7) are evenly distributed. The rubber suction cups (7) are used to pre-press the cutting cable assembly (6) onto the cockpit canopy surface (8).

3. The assembly pressurizing structure according to claim 1 or 2, characterized in that, A layer of attracting rubber pad (4) is vulcanized on the attracting magnet (5) to isolate the direct hard contact between the cockpit canopy surface (8) and the attracting magnet (5).

4. The assembly pressurizing structure according to any one of claims 1 to 3, characterized in that, The attracting magnet (5) is also provided with a magnetic conversion switch (9), and the magnetic conversion switch (9) is used to switch the magnetic force state between the pressing magnet (1) and the attracting magnet (5).

5. The assembly pressurization structure according to claim 4, characterized in that, The attracting magnet (5) includes a central cylindrical magnet (15) and two symmetrically arranged cast irons (13). The two cast irons (13) are symmetrically arranged on both sides of the central cylindrical magnet (15). The north and south pole directions of the central cylindrical magnet (15) are arranged along the radial direction. The cast iron (13) magnetic conversion switch (9) is used to axially rotate the central cylindrical magnet (15) to change the direction of the magnetic force lines generated by the central cylindrical magnet (15).

6. The assembly pressurizing structure according to claim 5, characterized in that, When the central cylindrical magnet (15) is rotated so that the north and south pole directions are perpendicular to the cockpit canopy surface (8), it is in the magnetic closed state at this time; when the central cylindrical magnet (15) is rotated so that the north and south pole directions are parallel to the cockpit canopy surface (8), it is in the magnetic open state at this time.

7. The assembly pressurizing structure according to any one of claims 1 to 6, characterized in that, The cutting cable assembly (6) includes a heat shrinkable tube (10), a cutting cable (11), and a rubber sheath (12); the rubber sheath (12) is wrapped around the outer periphery of the cutting cable (11) to keep the cutting cable (11) spaced from the transparent material of the cockpit canopy; the heat shrinkable tube (10) is used to wrap around the outer periphery of the rubber sheath (12) for external protection and to provide a flat pasting area.

8. The assembly pressurizing structure according to any one of claims 1 to 7, characterized in that, The pressing magnet (1) and the pressing rubber block (2) are detachable.

9. The assembly pressurizing structure according to any one of claims 1 to 8, characterized in that, The pressing magnet (1) is used to provide a pressing force of 10 kg to 40 kg per 200 mm.

10. A method of using an assembly pressurizing structure for a cutting cable (11) for a cockpit canopy rupture, characterized in that, The assembled pressing structure includes a pressing magnet (1), a pressing rubber block (2), and an attracting magnet (5); the pressing rubber block (2) has a groove for accommodating a cutting cable (11) assembly (6); rubber suction cups (7) are evenly distributed on the side of the pressing magnet (1) facing the attracting magnet (5); the attracting magnet (5) is provided with a magnetic conversion switch (9), and the magnetic conversion switch (9) is used to switch the magnetic force state between the pressing magnet (1) and the attracting magnet (5); the method includes: Fix the pressurized rubber block (2) provided with the cutting cable (11) assembly (6) on one side of the pressurized magnet (1) facing the pressurized rubber block (2); Pre-press the pressurized magnet (1) on the first side of the canopy curved surface (8) through the rubber suction cup (7) and adjust it to the correct position; Switch the magnetic conversion switch (9) to the off state, press the attracting magnet (5) against the second side of the canopy curved surface (8) and arrange it opposite to the pressurized magnet (1). After the installation position is determined, switch the magnetic conversion switch (9) to the on state.

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