Locking and opening mechanism of parachute cabin cover

Abstract

The utility model discloses a locking and opening mechanism of a parachute cabin cover. The locking and opening mechanism comprises a lock catch, a mounting plate, a spring bolt, a pin shaft, a reset spring, a fixing screw, an ejector rod, a fixing support and an initiating explosive device cutter. According to the utility model, a mechanical lock hooking design scheme and an initiating explosive device thrust unlocking mode are adopted, so that reliable locking and opening of the parachute cabin cover can be realized. The locking device is simple in structural form, easy to machine, manufacture and install, high in universality and suitable for locking and opening various unmanned aerial vehicle parachute hatch covers or other important hatch covers, and has certain application and popularization value.

Description

Technical Field

[0001] The utility model relates to the field of unmanned aerial vehicles, in particular to a locking and opening mechanism of a parachute cabin cover. Background Art

[0002] At present, unmanned aircraft are widely used, both for military and civilian use. According to weight, they can be divided into small, medium and large drones. After the drone flies, it needs to be safely recovered so that it can be reused and reduce costs. For drones with heavier weight, an important way to safely recover them is to use a parachute to recover them. The parachute is a complete recovery parachute system with a strict parachute packing procedure. After the parachute system is packed, it is placed in the parachute compartment and the parachute compartment is sealed with a parachute compartment cover. When the parachute is used, there is a strict parachute opening procedure. First of all, when the recovery command is issued, the parachute compartment cover must be opened reliably and the guide parachute must be thrown out, otherwise the parachute system cannot be opened. Therefore, the locking and opening of the parachute compartment cover is very critical. At present, there are different locking and opening mechanisms: some use explosive bolts, or use a small servo to control the opening and closing of the parachute compartment door, which are relatively expensive; some use Kevlar ropes with cutters, and the mechanism is more complicated. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a locking and opening mechanism for an umbrella cabin cover in view of the defects involved in the background technology.

[0004] The utility model adopts the following technical solutions to solve the above technical problems:

[0005] A locking and opening mechanism for a parachute canopy, comprising a lock buckle, a mounting plate, a lock tongue, a pin shaft, a return spring, a fixing screw, a push rod, a fixing bracket, and an explosive device cutter;

[0006] The lock buckle is installed on the inner wall of the parachute cover;

[0007] The lock tongue is strip-shaped, with a lock hook for cooperating with the lock buckle at one end, a fixing hole for cooperating with the return spring at the other end, and a pivot hole for cooperating with the pin shaft at the middle of the lock tongue;

[0008] The pyrotechnic cutter is fixed to the mounting plate via the fixing bracket;

[0009] One end of the push rod extends into the inner cavity of the pyrotechnic cutter and can slide freely along the inner cavity of the pyrotechnic cutter; and a raised limiting ring is provided on the push rod, so that the distance of the push rod outside the pyrotechnic cutter is a preset distance threshold;

[0010] The locking tongue is pivotally connected to the mounting plate via a pin and can rotate freely around the pin;

[0011] The return spring is arranged in parallel with the push rod, one end of which is fixed to the mounting plate by the fixing screw, and the other end is connected to the fixing hole on the lock tongue, and is in a stretched state, so that the head end of the push rod and the part of the lock tongue between the pin shaft and the fixing hole are against each other;

[0012] The mounting plate is fixed on the fuselage partition of the parachute compartment. When the pyrotechnic cutter is not powered on, the lock hook and lock buckle of the lock tongue cooperate to lock the parachute compartment cover. When the pyrotechnic cutter is powered on, the pyrotechnic cutter pushes the push rod to move, so that the lock tongue overcomes the pulling force of the return spring and the friction between the lock hook and lock buckle to rotate, thereby separating the lock hook and lock buckle of the lock tongue and opening the parachute compartment cover.

[0013] Compared with the prior art, the utility model adopts the above technical solution and has the following technical effects:

[0014] 1. The utility model adopts a mechanical lock hook design and an pyrotechnic thrust unlocking method, which can achieve reliable locking and opening of the parachute cover;

[0015] 2. The utility model has a simple structure, is easy to manufacture and install, has high versatility, is suitable for locking and opening umbrella canopies or important canopies of various unmanned aerial vehicles, and has certain promotion and application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structural locking of this mechanism;

[0017] Figure 2 This is a schematic diagram of the installation location of this mechanism;

[0018] In the figure, 1-lock hook on the lock tongue, 2-mounting plate, 3-reset spring, 4-top rod, 5-fixed bracket, 6-pyrotechnic cutter, 7-lock buckle, 8-parachute compartment cover, 9-pin shaft, 10-fixing screw, 11-fuselage partition of the parachute compartment. DETAILED DESCRIPTION

[0019] The technical solution of the utility model is further described in detail below in conjunction with the accompanying drawings:

[0020] The utility model can be implemented in many different forms and should not be considered to be limited to the embodiments described herein. On the contrary, these embodiments are provided to make the present disclosure thorough and complete, and will fully express the scope of the utility model to those skilled in the art. In the accompanying drawings, components are enlarged for clarity.

[0021] like Figure 1 As shown, the utility model discloses a locking and opening mechanism of an umbrella cabin cover, comprising a lock buckle, a mounting plate, a lock tongue, a pin shaft, a return spring, a fixing screw, a push rod, a fixing bracket, and an explosive device cutter;

[0022] The lock buckle is installed on the inner wall of the parachute cover;

[0023] The lock tongue is strip-shaped, with a lock hook for cooperating with the lock buckle at one end, a fixing hole for cooperating with the return spring at the other end, and a pivot hole for cooperating with the pin shaft at the middle of the lock tongue;

[0024] The pyrotechnic cutter is fixed to the mounting plate via the fixing bracket;

[0025] One end of the push rod extends into the inner cavity of the pyrotechnic cutter and can slide freely along the inner cavity of the pyrotechnic cutter; and a raised limiting ring is provided on the push rod, so that the distance of the push rod outside the pyrotechnic cutter is a preset distance threshold;

[0026] The locking tongue is pivotally connected to the mounting plate via a pin and can rotate freely around the pin;

[0027] The return spring is arranged in parallel with the push rod, one end of which is fixed to the mounting plate by the fixing screw, and the other end is connected to the fixing hole on the lock tongue, and is in a stretched state, so that the head end of the push rod and the part of the lock tongue between the pin shaft and the fixing hole are against each other;

[0028] The mounting plate is fixed on the fuselage partition of the parachute cabin. When the pyrotechnic cutter is not powered on, the lock hook and the lock buckle of the lock tongue cooperate to lock the parachute cabin cover. Figure 2 As shown; when the pyrotechnic cutter is powered on, the output blade of the pyrotechnic cutter moves against the push rod, causing the lock tongue to overcome the pulling force of the return spring and the friction between the lock hook and lock buckle to rotate, thereby separating the lock hook and lock buckle of the lock tongue and opening the umbrella cover.

[0029] In actual use, the packed main parachute bag is placed in the parachute cabin, and the canopy cover is closed so that the lock hook is hooked into the lock buckle. When the drone needs to be recovered after flight, a recovery command is issued to energize the pyrotechnic cutter, which generates thrust to push the top rod to push the lock tongue and lock hook to rotate, so that the lock hook is unhooked from the lock buckle, the canopy cover is opened, and a series of parachute opening actions are performed. Finally, the main parachute works to recover the drone without damage.

[0030] For a small parachute cover, one explosion lock of the utility model is used. For the parachute cover of a medium-sized or larger UAV, because it is wider, one can be used on each side, and the two can be installed symmetrically to make the parachute cover more firmly sealed.

[0031] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as the general understanding of ordinary technicians in the field to which the utility model belongs. It should also be understood that those terms such as those defined in general dictionaries should be understood to have the same meaning as the meaning in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless defined as herein.

[0032] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only a specific implementation method of the utility model and is not intended to limit the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A locking and opening mechanism for a parachute canopy, characterized in that: It includes a lock buckle, a mounting plate, a lock tongue, a pin shaft, a return spring, a fixing screw, a push rod, a fixing bracket, and an explosive device cutter; The lock buckle is installed on the inner wall of the umbrella cover; The lock tongue is strip-shaped, with a lock hook for cooperating with the lock buckle at one end, a fixing hole for cooperating with the return spring at the other end, and a pivot hole for cooperating with the pin shaft at the middle of the lock tongue; The pyrotechnic cutter is fixed to the mounting plate via the fixing bracket; One end of the push rod extends into the inner cavity of the pyrotechnic cutter and can slide freely along the inner cavity of the pyrotechnic cutter; and a raised limiting ring is provided on the push rod, so that the distance of the push rod outside the pyrotechnic cutter is a preset distance threshold; The locking tongue is pivotally connected to the mounting plate via a pin and can rotate freely around the pin; The return spring is arranged in parallel with the push rod, one end of which is fixed to the mounting plate by the fixing screw, and the other end is connected to the fixing hole on the lock tongue, and is in a stretched state, so that the head end of the push rod and the part of the lock tongue between the pin shaft and the fixing hole are against each other; The mounting plate is fixed on the fuselage partition of the parachute compartment. When the pyrotechnic cutter is not powered on, the lock hook and lock buckle of the lock tongue cooperate to lock the parachute compartment cover. When the pyrotechnic cutter is powered on, the pyrotechnic cutter pushes the push rod to move, so that the lock tongue overcomes the pulling force of the return spring and the friction between the lock hook and lock buckle to rotate, thereby separating the lock hook and lock buckle of the lock tongue and opening the parachute compartment cover.

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