Aircraft vibration test fixture mounting shim

Abstract

The utility model belongs to the field of aircraft structure technology discloses a kind of aircraft vibration test fixture installation gasket, including screw, nut and gasket combination, gasket combination is the structure of several gaskets superimposed, each gasket is equipped with annular piece and long handle integrated with annular piece, the long handle length of each gasket is same, and the length end portion of all gaskets is rotatably connected by screw and nut.The aircraft vibration test fixture installation gasket of the utility model solves the problem that the installation gap between the aircraft vibration test fixture and the test piece needs to be eliminated.This gasket has a handle for easy installation, and the gasket thickness is arranged in powers of 2, which can pad various sizes of gaps after combination. The handle end is installed with screws and nuts, making it easy to disassemble and assemble. Moreover, the installation gasket can be used to measure the gap size. The utility model has clear principle, simple structure, easy production and use, and great value.

Description

Technical Field

[0001] This utility model belongs to the field of aircraft structure technology, and relates to a gasket for an aircraft test fixture, specifically an installation gasket for an aircraft vibration test fixture. Background Technology

[0002] Aircraft vibration testing is a rigorous testing process, thus requiring high precision in the installation of test fixtures. Assembly errors between the test fixture and the test piece often result in installation gaps. These gaps lead to additional stress on the structure, causing premature cracking of the mounting bolt holes during severe vibration testing, and even test failure. Commonly used gaskets are difficult to install, often falling off or misaligned; furthermore, they are typically sold in bulk, requiring repeated attempts to level a gap, and cannot be combined with different thicknesses, frequently resulting in incomplete leveling of the gap. Utility Model Content

[0003] To address the aforementioned problems, this utility model proposes an aircraft vibration test fixture mounting shim. This shim has a handle for easy installation, and the shim thickness is arranged in a 2 to the power of N pattern, which, when combined, can level gaps of various sizes.

[0004] The technical solution of this utility model is as follows: An aircraft vibration test fixture mounting pad includes screws, nuts, and a pad assembly. The pad assembly is a structure composed of several pads stacked together. Each pad has a circular ring and a long stalk integral with the circular ring. The long stalk of each pad is of the same length, and the long ends of all pads are rotatably connected by screws and nuts.

[0005] Furthermore, each gasket in the gasket assembly is identical in dimensions except for its thickness.

[0006] Furthermore, all the gaskets in the gasket assembly have different thicknesses.

[0007] Furthermore, all the gaskets are arranged and stacked in order of thickness.

[0008] Furthermore, the thickness of all gaskets is based on the thickness of the thinnest gasket, and the thickness is increased by powers of 2 and arranged accordingly.

[0009] Furthermore, the gasket assembly includes six gaskets with thicknesses of 0.1mm, 0.2mm, 0.4mm, 0.8mm, 1.6mm, and 3.2mm in sequence.

[0010] The advantages of this utility model are as follows: This utility model relates to an aircraft vibration testing fixture mounting shim, which solves the problem of eliminating the installation gap between the aircraft vibration testing fixture and the test piece. This shim has a handle for easy installation; and the shim thickness is arranged in a 2 to the power of N pattern, allowing for the leveling of gaps of various sizes after assembly; the handle is secured with a screw and nut for easy assembly and disassembly; furthermore, this mounting shim can be used to measure gap dimensions. This utility model has a clear principle, simple structure, is easy to produce and use, and has significant value. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall installation pad of the aircraft vibration test fixture of this utility model.

[0012] Figure 2 This is a schematic diagram of the mounting pad structure of the aircraft vibration test fixture of this utility model.

[0013] In the diagram: 1-screw, 2-nut, 3-0.1mm washer, 4-0.2mm washer, 5-0.4mm washer, 6-0.8mm washer, 7-1.6mm washer, 8-3.2mm washer. Detailed Implementation

[0014] 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, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0015] The features and illustrative embodiments of various aspects of this utility model will now be described in detail. In the following detailed description, numerous specific details are set forth in order to provide a comprehensive understanding of this utility model. However, it will be apparent to those skilled in the art that this utility model can be practiced without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of this utility model by illustrating examples of it. This utility model is by no means limited to any specific arrangements and methods set forth below, but covers any improvements, substitutions, and modifications to the structure, method, and apparatus without departing from the spirit of this utility model. In the accompanying drawings and the following description, well-known structures and techniques are not shown to avoid unnecessarily obscuring this utility model.

[0016] In the description of this utility model, it should be noted that the directions or positional relationships indicated by terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They should not be construed as limiting this utility model. In addition, the use of ordinal numbers (e.g., "first and second," etc.) is for distinguishing objects and is not limited to this order, and should not be construed as indicating or implying relative importance.

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly, encompassing both direct connection and indirect connection via an intermediate medium. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0018] It should be noted that, where there is no conflict, the embodiments of this utility model and the features therein can be combined with each other, and the various embodiments can be referenced and cited in turn. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] Example 1: An aircraft vibration test fixture mounting pad includes a screw 1, a nut 2, and a pad assembly. The pad assembly is a structure composed of several pads stacked together. Each pad has a circular ring and a long stalk integral with the circular ring. The long stalk of each pad is of the same length. The long ends of all pads are rotatably connected by the screw 1 and the nut 2.

[0020] Each gasket in the gasket assembly is identical in all dimensions except for its thickness.

[0021] All gaskets in the gasket assembly have different thicknesses.

[0022] All gaskets are arranged and stacked in order of thickness.

[0023] The thickness of all gaskets is based on the thickness of the thinnest gasket, and the thickness is increased by powers of 2 and arranged accordingly.

[0024] The gasket assembly consists of 6 gaskets with thicknesses of 0.1mm, 0.2mm, 0.4mm, 0.8mm, 1.6mm, and 3.2mm in sequence.

[0025] Example 2: A component of an aircraft vibration test fixture mounting pad, such as Figure 1As shown, it mainly consists of eight parts: 1-screw, 2-nut, 3-0.1mm washer, 4-0.2mm washer, 5-0.4mm washer, 6-0.8mm washer, 7-1.6mm washer, and 8-3.2mm washer.

[0026] The following shims, with varying thicknesses (0.1mm shim 3, 0.2mm shim 4, 0.4mm shim 5, 0.8mm shim 6, 1.6mm shim 7, and 3.2mm shim 8), have similar shapes. One end is a round shim with a hole, and the other end is a handle. The hole allows bolts to pass through, preventing them from falling off during vibration testing. The handle facilitates installation and operation, avoiding positioning difficulties during installation. The handle end has bolt holes for installation and fixing with screws and nuts, and also facilitates assembly and disassembly. The shim thicknesses are arranged in a 2 to the power of N pattern, allowing for the leveling of gaps of various sizes. They are easy to use and highly accurate, as the range of shim combinations is wide and precise, and they can also be used to measure structural gaps. Alternatively, the nuts can be removed to assemble the shims to the corresponding gap size.

Claims

1. A mounting pad for an aircraft vibration testing fixture, characterized in that, It includes a screw (1), a nut (2) and a washer assembly. The washer assembly is a structure composed of several washers stacked together. Each washer has a circular ring and a long shank integral with the circular ring. The long shank of each washer is the same length. The long ends of all the washers are rotatably connected by the screw (1) and the nut (2).

2. The mounting pad for an aircraft vibration test fixture according to claim 1, characterized in that, Each gasket in the gasket assembly is identical in all dimensions except for its thickness.

3. The mounting pad for an aircraft vibration test fixture according to claim 1, characterized in that, All gaskets in the gasket assembly have different thicknesses.

4. The mounting pad for an aircraft vibration test fixture according to claim 1, characterized in that, All gaskets are arranged and stacked in order of thickness.

5. The mounting pad for an aircraft vibration test fixture according to claim 1, characterized in that, The thickness of all gaskets is based on the thickness of the thinnest gasket, and the thickness is increased by powers of 2 and arranged accordingly.

6. The mounting pad for an aircraft vibration test fixture according to claim 5, characterized in that, The gasket assembly consists of 6 gaskets with thicknesses of 0.1mm, 0.2mm, 0.4mm, 0.8mm, 1.6mm, and 3.2mm in sequence.

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