Glass throwing device cutting assembly vibration test clamping device

Abstract

The utility model relates to the field of work fixtures of initiating explosive devices, in particular to a clamping device for a vibration test of a cutting assembly of a cabin glass throwing device of a straight-series armed helicopter, which comprises a device body, an upper cover plate and a transition plate, the device body is fixed on a vibration table, and the cutting assembly is flatly placed on the device body. The protruding nuts sink into corresponding hole sites of the device body, the transition plates are horizontally placed on the two sides of the cutting assembly, screw heads above a frame of the cutting assembly sink into corresponding hole sites of the transition plates, the upper cover plate is horizontally placed on the transition plates and tightly attached to the frame of the cutting assembly and the device body through the transition plates, and the upper cover plate and the transition plates sequentially penetrate through the bolts. And the cutting assembly is screwed into the screw hole of the steel wire thread insert of the device body to be fixed in the device. The vibration test clamping device for the helicopter cabin glass jettisoning device cutting assembly can be universally used for vibration tests of armed helicopter cabin glass jettisoning device cutting assemblies of series such as straight-10, straight-19, straight-8G, straight-10ME and the like.

Description

Technical Field

[0001] The utility model relates to the field of tooling fixtures for initiating explosive devices, and particularly relates to a clamping device for a vibration test of a cutting component of a cockpit glass jettison device for a straight series of armed helicopters. Background Technique

[0002] An armed helicopter is a helicopter equipped with weapons and developed for performing combat missions. Among military helicopters, an armed helicopter is a veritable offensive weapon and equipment, which can effectively carry out precise strikes on various ground targets and ultra-low altitude targets and has an irreplaceable position and role in modern warfare.

[0003] When a helicopter is hit or encounters an irreversible mechanical failure, generally, the helicopter uses the active "ejection" method for life-saving. Due to the presence of a rotor on the top of the helicopter, after an accident, the helicopter cannot eject directly upward like a fixed-wing fighter. Instead, the rotor and cockpit glass need to be blown up first, and then the pilot ejects out of the cabin. The cockpit glass jettison device of an armed helicopter is used to cut and separate the cockpit glass of the helicopter in case of an emergency to provide an escape route for the pilot. The cockpit glass jettison device of an armed helicopter consists of a jettison handle, an initiating explosive component, a cutting component, etc. The cutting component is an important part of the cockpit glass jettison device of an armed helicopter. After the pilot gives a cutting instruction through the jettison handle, the instruction is transmitted to the cutting component through the initiating explosive component. After receiving the instruction, the cutting cable in the cutting component acts to complete the cutting and separation of the cockpit glass.

[0004] Whether the cutting component can function properly is directly related to whether the cockpit glass can be completely cut, which in turn affects whether the pilot can escape safely. Therefore, it is crucial to verify the functional reliability of the cutting component. After the cutting component is installed on the helicopter cockpit glass, it is in service throughout its lifespan. Inevitably, various vibration environments are generated during each flight of the helicopter. According to incomplete statistics, in military equipment failure cases, those caused by vibration account for more than 20%. Therefore, whether the cutting component installed on the cockpit glass can function properly after experiencing multiple vibration environments is an issue we cannot avoid. To assess the adaptability of the product to the vibration environment and the structural integrity, the vibration environment is usually restored and simulated in the laboratory through vibration test equipment. Vibration tests aim to evaluate the reliability of the product by simulating the vibrations in the product's real environment. Through this test, engineers can gain a comprehensive understanding of the vibration resistance lifespan and performance indicators of the product, identify the weak links that may cause damage or failure, and then upgrade and improve them to make the comprehensive performance indicators of the product more prominent. Vibration tests are mostly used to reproduce complex vibration environments such as aircraft takeoff or landing, rocket launch, and transportation, and are also often used to screen for process problems, detect early faults, and improve the analysis model. Conducting vibration tests on the product can reduce maintenance costs, improve product reliability and customer satisfaction, and thus increase the return on investment.

[0005] Vibration tests are the result of the interaction of the "shaker table surface - fixture - test piece" combination. The fixture is a structural component introduced to solve the installation and connection problems in the test, and its function is to transmit the vibration and energy of the shaker table to the test piece without distortion. The same is true for the ejection device of the helicopter cockpit glass. To conduct vibration tests on it, a test fixture that meets the assembly requirements must be designed to fix and clamp it. Utility Model Content

[0006] To solve the problem of clamping the cutting component of the ejection device of the straight series armed helicopter cockpit glass during vibration tests, the present utility model provides a clamping device for the vibration test of the cutting component of the ejection device of the straight series armed helicopter cockpit glass, adopting the following technical solutions:

[0007] A clamping device for the vibration test of a cutting component of a glass throwing device, comprising a device body, an upper cover plate and a transition plate. The device body is an installation platform for the cutting component and also a transfer piece connected to the vibration table. The device body is provided with fixed stepped holes that conform to the hole patterns of both imperial and metric vibration tables, and is fixed on the vibration table by internal hexagon screws. The cutting component is placed flat on the device body, and the transition plate is placed flat on both sides of the cutting component. The screw heads above the frame of the cutting component sink into the corresponding holes of the transition plate. The upper cover plate is placed flat on the transition plate and is closely attached to the frame of the cutting component and the device body through the transition plate. The upper cover plate and the transition plate pass through bolts in sequence and are screwed into the wire thread insert screw holes of the device body to fix the cutting component in the device.

[0008] Furthermore, holes are arranged at the corresponding positions of the clamping device body and the fixing screws below the cutting component, so that when the cutting component is placed flat on the clamping device body, the protruding nuts just sink into the corresponding openings, and the frame is closely attached to the device body. Sector-shaped steps are milled on the lower sides of the four corners of the clamping device body, and four rectangular hollow grooves are left in the middle.

[0009] Furthermore, rectangular hollow grooves of the same shape are opened at the corresponding positions of the upper cover plate and the rectangular hollow grooves of the device body, and "U"-shaped openings are respectively opened at the corresponding positions in the middle of both sides of the upper cover plate and the device body.

[0010] Furthermore, the transition plate is in the shape of a strip, and holes are arranged at the corresponding positions of the transition plate and the fixing screws above the cutting component.

[0011] Advantages of the present utility model

[0012] The clamping device for the vibration test of the cutting component of the helicopter cockpit glass throwing device of the present utility model can be commonly used for the vibration tests of the cutting components of the cockpit glass throwing devices of series armed helicopters such as Z-10, Z-19, Z-8G, and Z-10ME. For the cutting components of different specifications of the cockpit glass throwing devices of the Z-series armed helicopters, it only needs to leave the corresponding counterbores for the cutting components on the device in advance to be used. Description of the drawings

[0013] Figure 1 It is a cross-sectional view of the present utility model;

[0014] Figure 2 It is a structural schematic diagram of the present utility model;

[0015] Figure 3 It is the cockpit glass cutting component;

[0016] Figure 4 It is the clamping device body;

[0017] Figure 5 It is the upper cover plate of the clamping device;

[0018] Figure 6 It is a transition plate for the clamping device.

[0019] In the figure, 1 is the cutting assembly, 2 is the upper cover plate, 3 is the bolt, 4 is the device body, and 5 is the transition plate. Specific implementation mode

[0020] The following further describes the present utility model in detail with reference to the attached drawings and specific embodiments: Embodiment 1

[0021] As Figure 1-2 shown, a clamping device for the vibration test of the cutting assembly of the cockpit glass jettison device of a straight series armed helicopter includes a device body 4, an upper cover plate 2, a transition plate 5, etc. The device body 4 is provided with fixed stepped holes that conform to the hole layout of both imperial and metric vibration tables, and is fixed on the vibration table through internal hexagon screws. The cutting assembly 1 is placed flat on the device body 4, and the protruding nuts sink into the corresponding holes of the device body 4. The orientation of the detonator connector is consistent with the orientation of the "U" - shaped opening of the device. The transition plate 5 is placed flat on both sides of the cutting assembly 1, and the screw heads above the frame of the cutting assembly 1 sink into the corresponding holes of the transition plate 5. The upper edge of the cutting cable is lower than the upper surface of the transition plate 5. The upper cover plate 2 is placed flat on the transition plate 5, and is in close contact with the frame of the cutting assembly 1 and the device body 4 through the transition plate 5. The M8 bolt 3 passes through the upper cover plate 2 and the transition plate 5 in sequence, and is screwed into the wire thread insert screw hole of the device body 4, firmly fixing the cutting assembly 1 inside the device, and then the vibration test is carried out. After the device completes the vibration in one direction on the vertical table surface of the vibration table, it can achieve the vibration tests in the other two directions by rotating 90° with the help of a horizontal sliding table.

[0022] 1) Use an internal hexagon socket head screw with a suitable length to fixedly install the device body 4 on the horizontal sliding table surface of the vibration testing machine through the mounting counterbore;

[0023] 2) Place the cutting assembly 1 flat on the device body 4 according to the reserved counterbore and the "U" - shaped opening direction on the device body 4, so that the lower surface of the frame of the cutting assembly 1 is in close contact with the device body 4;

[0024] 3) Place the transition plate 5 flat on the frame of the cutting assembly 1, and the protruding screw heads on the frame of the cutting assembly 1 sink into the counterbores of the transition plate 5, so that the upper surface of the frame of the cutting assembly 1 is in close contact with the transition plate 5;

[0025] 4) Place the upper cover plate 2 flat on the transition plate 5, with the "U" - shaped opening in the same direction as the "U" - shaped opening of the device body, and align the edge through - holes with the edge threaded holes of the device;

[0026] 5) Pass the M8 bolt 3 through the upper cover plate 2 and the transition plate 5 in sequence and then screw it into the screw hole of the device body 4, and tighten the screws around in turn to fix the cutting assembly 1 inside the device;

[0027] 6) Paste the acceleration sensor at the appropriate position, connect it to the test circuit, turn on the test equipment, and conduct the vibration test;

[0028] 7) After the vibration in one direction is completed, rotate the device by 90° or fix it on the vertical tabletop, install it according to the above steps, and conduct the vibration test in another direction.

[0029] The cutting assembly 1 of the cockpit glass ejection device is as shown in the appendix Figure 3 As shown, it is composed of a cold-formed hollow steel frame, aviation plexiglass, a cutter, a detonating joint, nuts, gaskets, etc. The cutter is pasted around the aviation plexiglass. The aviation plexiglass is fixed inside the cold-formed hollow steel frame through nuts, gaskets, rubber strips, etc. The detonating joint is fixed on the frame and connected to the cutter. Each component fits tightly and is reliably connected. Since there are fixing screws, nuts, and detonating joints around the frame, and the cutter is also higher than the frame, it is necessary to solve the problem of clamping and fixing the cutting assembly 1 before the vibration test.

[0030] As Figure 4 shown, the device body 4 is provided with imperial and metric fixing hole patterns.

[0031] The imperial hole pattern on the device body 4 is applicable to the scenario where the vibration tabletop has hole patterns in imperial units. The hole positions are on the circles with a diameter of 4 inches and 8 inches centered on the device center. There are 4 evenly distributed hole positions on each circle, showing a symmetric distribution. The device can be fixed to the vibration tabletop every time it rotates 90°, ensuring the simplicity of the test.

[0032] The metric hole pattern on the device body 4 is applicable to the scenario where the vibration tabletop has hole patterns in metric units. The hole positions are at the vertices of a square with a spacing of 200 mm, showing a symmetric distribution. The device can also be fixed to the vibration tabletop every time it rotates 90°, ensuring the simplicity of the test.

[0033] The imperial and metric fixing hole patterns on the device body 4 are through holes and are both stepped counterbores. When using an internal hexagonal socket head screw for fixing, ensure that the cylindrical head of the screw sinks into the device body (4) and there is no protrusion on the plane.

[0034] The upper cover plate 2 is as shown in Figure 5 shown. The through holes are opened at the corresponding positions of the threaded holes of the clamping device upper cover plate 2 and the device body 4. The size of the through holes is larger than Φ8 to ensure that the screws can pass through smoothly. The same rectangular hollow slots are opened at the corresponding positions of the rectangular hollow slots of the clamping device upper cover plate 2 and the device body 4 to reduce the weight of the upper cover plate 2 and at the same time facilitate observing the integrity of the plexiglass below the upper cover plate 2. "U" - shaped openings are respectively opened at the corresponding positions in the middle of both sides of the clamping device upper cover plate 2 and the device body 4 to reserve positions for the protruding detonating joints and also facilitate distinguishing the installation direction of the cutting assembly.

[0035] The transition plate 5 is as shown in Figure 6As shown, the main function is to protect the protruding cutting cable from being squeezed. The transition plate 5 is in the shape of a strip plate. The transition plate 5 is provided with holes at positions corresponding to the fixing screws above the cutting assembly 1. The hole diameter is larger than the size of the screw head. When the cutting assembly 1 is placed flat on the clamping device body 4, the protruding screw just sinks into the corresponding opening, and the frame is closely attached to the device transition plate 5. Through holes are opened at positions corresponding to the threaded holes of the transition plate 5 and the device body 4. The size of the through holes is larger than Φ8 to ensure that the M8 bolt 3 can pass through smoothly.

[0036] The technical solution of the present utility model is not limited to the limitations of the above specific embodiments. Any technical deformation made according to the technical solution of the present utility model falls within the protection scope of the present utility model.

Claims

1. A glass throwing device cutting assembly vibration test clamping device, comprising a device body (4), an upper cover plate (2) and a transition plate (5), characterized in that: The device body (4) is a cutting assembly installation platform and also an adapter connected to the vibration table. The device body (4) is provided with a fixed step hole that conforms to the British and metric vibration table hole layouts and is fixed to the vibration table by means of hexagonal screws. The cutting assembly (1) is placed flat on the device body (4), and the transition plate (5) is placed flat on both sides of the cutting assembly (1). The screw heads above the frame of the cutting assembly (1) are sunk into corresponding holes of the transition plate (5). The upper cover plate (2) is placed flat on the transition plate (5) and is closely fitted with the frame of the cutting assembly (1) and the device body (4) through the transition plate (5). The upper cover plate (2) and the transition plate (5) are sequentially passed through the bolts (3) and screwed into the screw holes of the wire screw sleeves of the device body (4) to fix the cutting assembly (1) in the device.

2. The vibration test clamping device according to claim 1, characterized in that: The clamping device body (4) is provided with holes at positions corresponding to the fixing screws below the cutting assembly (1), so that when the cutting assembly (1) is placed flat on the clamping device body (4), the protruding nut just sinks into the corresponding opening, the frame and the device body (4) fit tightly, and fan-shaped steps are milled on the lower side of the four corners of the clamping device body (4), leaving four rectangular hollow grooves in the middle.

3. The vibration test clamping device according to claim 1, characterized in that: The upper cover plate (2) and the device body (4) have the same rectangular hollow grooves at positions corresponding to the rectangular hollow grooves, and "U"-shaped openings are respectively opened in the middle of both sides of the upper cover plate (2) at positions corresponding to the device body (4).

4. The vibration test clamping device according to claim 1, characterized in that: The transition plate (5) is in the shape of a strip plate, and holes are arranged at positions corresponding to the fixing screws above the transition plate (5) and the cutting assembly (1).

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