A vibration test module protection box

Abstract

The utility model discloses a vibration test module protection box, including box body, apron, limit stop, high hardness rubber pad, wedge locking strip, not to come out screw and wave circular washer. Box body and apron inboard are pasted with high hardness rubber pad, are used for buffering and isolating module and outside hard contact, avoid scratch and surface damage, limit stop sets up in box body lateral wall, is connected through not to come out screw and wave circular washer, possesses automatic release structure, and it is convenient for module dismounting, wedge locking strip installs in box body outside, is used for firmly locking protection box in vibration test fixture. The module protection box simple structure, the protection effect is remarkable, and the adaptability is strong, is applicable to the vibration test of various kinds of avionics module, can effectively promote module appearance quality grade and test pass rate, has good engineering application value.

Description

Technical Field

[0001] This utility model relates to the field of rubber processing technology, and in particular to a protective box for a vibration test module. Background Technology

[0002] With the development of integrated avionics systems, highly integrated field-replaceable modules (LRMs) are increasingly being used. These modules are quickly installed and secured on the chassis using specific locking mechanisms, and can even be disassembled and assembled on-site without tools, saving time and effort. For airborne products, in order to verify that the product can function normally in the airborne environment and ensure the product's functionality and structural integrity, modules must undergo relevant vibration tests before delivery and acceptance, according to relevant requirements, to ensure their safety and reliability.

[0003] During vibration testing, the module needs to be installed and fixed in a test fixture. The module housing is equipped with a specific locking mechanism, and the sides of the housing have raised ribs. First, the locking mechanism is unlocked, then the ribs are inserted into the mounting slots of the test fixture. Once inserted, the locking mechanism is locked, and its locking pulley is embedded into the fixing slot of the test fixture. Finally, under the combined action of the locking mechanism, the ribs, and the locking pulley, the module is securely installed and fixed in the slot of the test fixture. The test fixture is then fixed on the vibration platform for vibration testing. After the vibration test, the test piece is inspected. Frequently, scratches and wear on the coating of the module ribs, locking mechanism, and the sides of the housing are found. These appearance defects seriously affect product delivery, schedule, and quality assessment.

[0004] Product appearance inspection after testing is a crucial part of quality control. Its standards primarily cover requirements for surface defects, dimensional deviations, and other aspects to ensure that the quality meets design and delivery requirements. Specifically, regarding surface defects, the module's surface must be free of scratches, indentations, dents, cracks, burrs, oxidation, and other defects; color differences, coating peeling, and bubbles are also unacceptable.

[0005] Based on the analysis of existing module vibration testing methods, comparative tests were conducted on the defective module ribs, locking mechanisms, and coating positions on the sides of the housing. The causes of the product appearance problems are as follows:

[0006] 1) The internal mounting slot of the test fixture was not cleaned before use, and there may be powder particles and other hard foreign objects inside due to vibration and wear.

[0007] 2) The product is secured using a puller locking mechanism and mechanical clamping with the box ribs: Along the axial direction of the mounting slot, the puller locking mechanism's latch and pulley are interference-fitted to hold the product in the X-direction of the tooling. Due to manufacturing and assembly tolerances, the puller locking mechanism may experience slight wobbling under test conditions. In this case, the latch and pulley will impact the tooling's fixed position, directly resulting in wear on the latch surface.

[0008] 3) The product is fixed by using a puller locking mechanism and mechanical clamping of the box ribs: In the horizontal direction of the mounting slot, the ribs fit against the side wall of the mounting slot to fix the product in the Y direction. To ensure smooth product insertion, the actual spacing of the tooling mounting slot is greater than the thickness of the product ribs. There are gaps between the ribs on both sides and the mounting slot, and the product is not completely fixed. This causes slight vibration of the product during the test, which eventually leads to wear on the surface of the ribs.

[0009] 4) In the vertical direction of the test fixture mounting slot, in order to ensure smooth product insertion, the distance between the upper and lower mounting slots of the fixture is greater than the width of the product with ribs. The product is not completely fixed in the B direction, which causes slight vibration of the product during the test, and eventually leads to wear on the rib surface and the side of the box.

[0010] 5) When the product is inserted into the mounting slot, the box and the test fixture will inevitably come into contact, resulting in scratches caused by sliding.

[0011] The clamping method of the above-mentioned modules in the test fixture slots results in relative sliding or wobbling, inevitably leading to localized compression deformation and indentations or scratches on the appearance. To avoid damage to the appearance of the module products during vibration testing, the clamping method of the modules in the test fixture slots needs to be improved to enhance the product's appearance quality level. Utility Model Content

[0012] The purpose of this utility model is to reduce the appearance problems that may exist during product delivery and acceptance, and improve the first-time delivery pass rate. In response to the situation where appearance defects such as scratches and coating wear on the module ribs, locking mechanism and the side coating surface of the box affect product delivery during vibration testing, the clamping method of the module in the test fixture slot is improved to enhance product quality.

[0013] This utility model is achieved using the following technical solution: a vibration test module protective box, characterized in that it includes a box body with a receiving cavity for accommodating the module, the inner wall of the receiving cavity being provided with an elastic buffer layer for buffering and protecting the outer surface of the module; a cover plate, detachably disposed on the box body, for closing the receiving cavity and limiting the vertical movement of the module, the cover plate being connected to the box body via a connector; at least two limiting components, including a limiting block disposed on the side wall of the box body and an elastic adjusting member installed between the limiting block and the box body, the limiting components being used to laterally limit the module and automatically releasing the limiting state in the loosened state; at least one set of locking components, including a wedge-shaped locking strip disposed on the outside of the box body, for detachably fixing the module protective box to a test fixture or other mounting structure. After the protective box is correctly installed, the module and the test fixture do not have direct contact or connection, which can effectively prevent damage to the product during the test.

[0014] Furthermore, the elastic buffer layer is a high-hardness rubber pad attached to the inner surface of the box body and the cover plate, and the rubber pad is installed by adhesive. The high-strength rubber pad can be bonded to the boss surface of the limiting block with double-sided adhesive. When the rubber pad becomes dirty or damaged, it can be directly replaced with a new rubber pad, allowing the protective box to be used repeatedly for a long time and reducing the cost of use.

[0015] Furthermore, the limiting block is connected to the box body by a non-removable screw, and the elastic adjustment component is a wave-shaped circular washer installed between the limiting block and the box body. When the non-removable screw is loosened, it pushes the limiting block to retract to form a gap for module removal.

[0016] Furthermore, the wedge-shaped locking strip is fixed to the ribs on both sides of the box body by screws, and the structure is a conical pressure block, which can generate radial extrusion force in the fixture to achieve clamping and locking.

[0017] Furthermore, the wedge-shaped locking strip is made of copper alloy or aluminum-copper composite material to enhance its thermal conductivity and impact resistance. The wedge-shaped locking strip features high thermal conductivity and shock resistance, a strong connection, high reliability, simple structure, and convenient and flexible assembly and disassembly.

[0018] Furthermore, the limiting block is a replaceable structure, and its shape and size can be changed or adjusted according to the module specifications to adapt to different models of modules.

[0019] Furthermore, the box body, cover plate, and limiting block are all made of metal and assembled by mechanical connection. All components are detachable and replaceable for long-term repeated use. c) The protective box is made of metal parts and is assembled with screws. Each component is detachable.

[0020] The beneficial effects of the vibration test module protective box described in this utility model include:

[0021] This invention features a box and cover with high-hardness rubber pads, which fully enclose the module after it is installed. During vibration testing, the module remains in soft contact with the rubber layer and does not directly contact the test fixture. This effectively prevents scratches, wear, paint peeling, and other appearance defects on the module ribs, locking mechanism, and box coating surface, significantly improving the first-time delivery pass rate.

[0022] Vertical movement is restricted by the upper and lower cover plates, and the side limiting block structure, together with rubber pads and elastic washers, provides effective lateral and longitudinal constraints. The module does not shake or shift during the test, further preventing local damage caused by minor vibrations. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of a protective box for a vibration test module;

[0025] Figure 2 This is a schematic cross-sectional view of a protective box for a vibration test module;

[0026] Figure 3 This is a schematic diagram of the limit block installation.

[0027] In the diagram, 1-box body, 2-cover plate, 3-limiting block, 4-wedge locking strip, 5-rubber pad, 6-non-removable screw, 7-wave-shaped circular washer. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention. Example 1

[0030] like Figure 1-2 As shown, this embodiment provides a vibration test module protective box, including a box body 1, a cover plate 2, a limiting block 3, a high-hardness rubber pad 4, a wedge-shaped locking strip 5, a non-removable screw 6, and a wave-shaped circular washer 7.

[0031] The box body 1 is made of aluminum plate (preferably AL-6061), with external dimensions of 200mm×200mm×40mm. It has a rectangular groove structure. High-hardness rubber pads 4 are attached to the inside of the box body 1. When the module is placed inside the box body 1, it makes surface contact with the rubber pads to avoid damage to the module ribs and surface during the test.

[0032] The cover plate 2 is fitted with rubber pads 4 and is fixed to the box body 1 by non-removable screws 6. After assembly, the module is clamped between the upper and lower rubber pads, which can effectively buffer the impact and friction during vibration. Limiting blocks 3 are set on both sides of the box body 1, and each limiting block 3 has a rubber pad 4 attached to the side closest to the module to achieve soft contact limiting of the module. The limiting blocks are fixed to the box body by non-removable screws 6, and the connection part is provided with a wave-shaped circular washer 7.

[0033] Specifically, the wave-shaped circular washer 7 is used to automatically pop open the limiting block 3 when the screw is loosened after the test, creating a gap between the module and the limiting block 3, making it easier to remove the module without manually adjusting the position of the limiting block 3, thus improving the ease of operation. The side of the box 1 has an open structure, and after loosening the non-removable screw 6 between the box 1 and the cover plate 2, the module can be directly inserted into the box 1 from the side.

[0034] The wedge-shaped locking strip 5 is set on the ribs on both sides of the box body 1. It is tightened by locking screws to fix the entire protective box in the vibration fixture slot, preventing the protective box from shifting or loosening during vibration testing, and ensuring the stability and safety of the overall test.

[0035] This protective box effectively prevents surface defects such as scratches, indentations, and wear caused by relative sliding, contact, and shaking during vibration testing. It is reliable in structure, easy to install, and reusable, thus improving the pass rate of module delivery and acceptance. Example 2

[0036] This embodiment is a further optimization based on Embodiment 1, specifically:

[0037] The wedge-shaped locking strip 5 is made of a metal material with excellent thermal conductivity and impact resistance, preferably a copper alloy or an aluminum-copper composite material, and is suitable for high-frequency vibration test conditions.

[0038] Specifically, the wedge-shaped locking bar 5 adopts a conical pressure block design, which generates axial compressive force after tightening the locking screw, thus securing the protective box 1 in the test fixture. This design is not only compact and stable, but also quickly dissipates the local heat generated during vibration, preventing the temperature rise from affecting the module or protective box structure.

[0039] This improvement helps enhance the adaptability and stability of the protective box under high-intensity testing environments, making it particularly suitable for testing avionics modules for military or high-reliability applications. Example 3

[0040] This embodiment is a further optimization based on Embodiment 1, specifically:

[0041] The limit block 3 is designed to be replaceable, making it easy to adapt and adjust to different module sizes.

[0042] Specifically, the limiting block 3 includes an integrally molded body structure, which, together with rubber pads of different thicknesses, can quickly achieve adjustment and matching in the dimension of the module, adapting to different models of modules for protective installation within the same protective box structure, thus improving the versatility and on-site adaptability of the protective box.

[0043] The main structure of the protective box remains unchanged. By simply changing the thickness of the limiting block or the rubber pad, it can be adapted to different types of modules, which is conducive to standardized batch testing operations and reduces production and maintenance costs.

[0044] The above embodiments describe the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Modifications and variations made by those skilled in the art without departing from the spirit and scope of this utility model should be protected within the scope of the appended claims.

Claims

1. A protective box for a vibration test module, characterized in that, The device includes a housing (1) having a receiving cavity for accommodating the module, the inner wall of which is provided with an elastic buffer layer for buffering and protecting the outer surface of the module; a cover plate (2) detachably disposed on the housing (1) for closing the receiving cavity and limiting the vertical movement of the module, the cover plate (2) being connected to the housing (1) by a connector; at least two limiting components, including a limiting block (3) disposed on the side wall of the housing (1) and an elastic adjusting member installed between the limiting block (3) and the housing (1), the limiting components being used to limit the module laterally and automatically releasing the limiting state in the loosened state; and at least one locking component, including a wedge-shaped locking strip (5) disposed on the outside of the housing (1) for detachably fixing the module protective box to a test fixture or other mounting structure.

2. The vibration test module protective box according to claim 1, characterized in that, The elastic buffer layer is a high-hardness rubber pad (4) attached to the inner surface of the box body (1) and the cover plate (2), and the rubber pad (4) is installed by adhesive.

3. The vibration test module protective box according to claim 1, characterized in that, The limiting block (3) is connected to the box body (1) by a non-removable screw (6). The elastic adjustment component is a wave-shaped circular washer (7) installed between the limiting block (3) and the box body (1). When the non-removable screw (6) is loosened, it pushes the limiting block (3) to retract to form a module removal gap.

4. The vibration test module protective box according to claim 1, characterized in that, The wedge-shaped locking strip (5) is fixed to the two side ribs of the box body (1) by screws. The structure is a conical pressure block, which can generate radial extrusion force in the fixture to achieve clamping and locking.

5. A vibration test module protective box according to claim 4, characterized in that, The wedge-shaped locking strip (5) is made of copper alloy or aluminum-copper composite material to enhance its thermal conductivity and impact resistance.

6. A vibration test module protective box according to claim 1, characterized in that, The limiting block (3) is a replaceable structure, and its shape and size can be changed or adjusted according to the module specifications to adapt to different models of modules.

7. A vibration test module protective box according to claim 1, characterized in that, The box body (1), cover plate (2) and limiting block (3) are all made of metal materials and are assembled by mechanical connection. All components can be disassembled and replaced to achieve long-term repeated use.

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