Particle damping vibration absorption device applied to airborne display module

Abstract

The invention discloses a particle damping vibration absorption device applied to an airborne display module, which is characterized in that a particle damping vibration absorber unit is arranged on an airborne display unit, and the airborne display unit comprises a structural component, a liquid crystal screen component, an optical component, a circuit component and a backlight component, the structure assembly, the liquid crystal screen assembly, the optical assembly, the backlight assembly and the circuit assembly are arranged in sequence, and the man-machine interaction function can be achieved. According to the scheme, the particle damping vibration absorption device is simple in structure, particle damping vibration absorption is achieved by arranging the particle damping vibration absorber unit at the vibration response peak point on the airborne display unit, effective vibration absorption in the airborne severe environment is achieved through cooperation of an elastic element, damping particles and a damping pad in the particle damping vibration absorber unit, and the particle damping vibration absorption device is simple in structural form and convenient to use. The device has the characteristics of high reliability, simplicity and convenience in operation, easiness in maintenance, capability of meeting normal use in an airborne severe environment and the like, and can effectively reduce the vibration response peak value on the liquid crystal display screen.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of airborne display reinforcement, and particularly relates to a granular damping vibration absorption device applied to an airborne display module. BACKGROUND

[0002] In an airborne environment, a display module bears severe impact and vibration, which leads to poor display effect of a liquid crystal display screen and greatly increases the failure rate of a printed board. Among environmental factors causing failure of airborne electronic equipment, vibration factors account for about 27%, so when a display module is dynamically designed, vibration reduction needs to be realized through detuning, decoupling and damping technology.

[0003] The granular damping is caused by continuous collision and friction between particles and between the particles and the inner wall of the container through external vibration excitation, so as to dissipate vibration energy of the system and achieve the effect of vibration reduction and noise reduction. The granular damping vibration absorption technology has a wide vibration reduction frequency band, is effective in the frequency range of 0-5000 Hz, has good vibration reduction effect, and is particularly suitable for strong vibration environment of an airplane.

[0004] At present, airborne electronic equipment reduces vibration response amplitude by improving rigidity of structural members, and the applicable frequency range is narrow, mainly in a low frequency band, and vibration reduction effect in a high frequency band is not obvious, so the application has certain advantages in the high frequency band. SUMMARY

[0005] In view of the above problems, the application aims to provide a granular damping vibration absorption device applied to an airborne display module.

[0006] The technical scheme for realizing the application is as follows.

[0007] A granular damping vibration absorption device applied to an airborne display module, comprising an airborne display unit and a granular damping vibration absorber unit.

[0008] The granular damping vibration absorber unit is arranged on the airborne display unit.

[0009] Further, the airborne display unit comprises a structural assembly, a liquid crystal screen assembly, an optical assembly, a circuit assembly and a backlight assembly, and the structural assembly, the liquid crystal screen assembly, the optical assembly, the backlight assembly and the circuit assembly are arranged in sequence.

[0010] Further, the granular damping vibration absorber unit is arranged at a peak point of vibration response amplitude of the airborne display unit.

[0011] Further, the granular damping vibration absorber unit comprises an upper cover plate, damping particles, a damping pad (2-3), an elastic element, a gasket and a base.

[0012] The base is provided with the damping pad, and the damping particles are arranged between the damping pad and the upper cover plate.

[0013] The elastic elements are uniformly arranged around the base, so as to realize vibration response value attenuation on the airborne display unit, and a gasket is further arranged on the elastic element.

[0014] Further, the upper cover plate and the base are made of aluminum alloy material.

[0015] The damping particles are composed of a plurality of spherical particles made of aluminum alloy material, the diameter of a single aluminum alloy particle ranges from 2mm to 4mm, and the filling rate of the damping particles is set to 50% to 70%.

[0016] The damping particles are arranged in the container surrounded by the damping pad, and spaces are arranged between the particles.

[0017] Further, the damping pad with high adhesive strength is pasted on the base by back adhesive, the damping pad is made of viscoelastic rubber, and is pasted in the inner cavity of the base by back adhesive, the thickness of the damping pad is 1mm, and the loss factor ranges from 0.2 to 0.4.

[0018] Further, the elastic element comprises an upper support, a support column and a lower support.

[0019] The support column is arranged between the upper support and the lower support.

[0020] The upper support and the lower support are made of silicone rubber material, and the support column is made of stainless steel material.

[0021] The inherent frequency of the entire elastic element is 30Hz to 50Hz, the damping efficiency is greater than or equal to 55%, and the maximum displacement is less than or equal to 2mm.

[0022] Compared with the prior art, the beneficial effects of the present application are that:

[0023] The particle damping vibration absorber device has the advantages of simple structure, particle damping vibration absorber unit arranged at the peak points of the first three modes on the airborne display unit, effective damping in airborne harsh environment by cooperation of the elastic element, the damping particles and the damping pad in the particle damping vibration absorber unit, simple structure, high reliability, simple operation, easy maintenance, normal use in airborne harsh environment, and the like, and effectively reduced vibration response peak value on the liquid crystal display screen.

[0024] The present application will be further described in conjunction with the specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is an assembly schematic view of the particle damping vibration absorber device applied to the airborne display module of the present application.

[0026] Figure 2It is a schematic diagram of the airborne display unit structure of the present application.

[0027] Figure 3 It is a schematic diagram of the particle damping vibration absorber unit structure of the present application.

[0028] Figure 4 It is a schematic diagram of the elastic element structure of the present application. DETAILED DESCRIPTION

[0029] In order to clearly describe the technical solutions of the present application and the effects achieved, the technical solutions of the present application will be clearly explained below in combination with the drawings of the present application and specific examples, so that the skilled in the art can realize the present application without creative labor. The structure shown in the drawings is not the whole of the actual structure but only a part of the actual structure. It should be noted that all other examples made by the skilled in the art on the basis of the examples of the present application without creative labor shall fall within the protection scope of the present application.

[0030] The following listed examples are only for better illustrating the present application, but the content of the present application is not limited to the application in the listed examples. Therefore, the skilled in the art can make non-essential modifications to the examples on the basis of the above summary of the application and apply them to other examples, which still fall within the protection scope of the present application. In addition, the experimental methods in the following examples without specific conditions shall be carried out according to the conventional or suggested conditions of the manufacturer. The expressions in the text are only used for distinguishing and do not have other meanings if not specially mentioned.

[0031] EXAMPLE

[0032] In combination Figure 1 , a particle damping vibration absorbing device applied to an airborne display module, comprising an airborne display unit 1 and a particle damping vibration absorber unit 2;

[0033] The particle damping vibration absorber unit 2 is arranged on the airborne display unit 1.

[0034] Further, the airborne display unit 1 comprises a structure assembly 1-1, a liquid crystal screen assembly 1-2, an optical assembly 1-3, a circuit assembly 1-4, and a backlight assembly 1-5, which can meet the requirements of airborne environmental adaptability such as vibration, impact, high and low temperature, and humidity. The structure assembly 1-1, the liquid crystal screen assembly 1-2, the optical assembly 1-3, the backlight assembly 1-5, and the circuit assembly 1-4 are arranged in sequence, which can realize the human-computer interaction function.

[0035] The particle damping vibration absorber unit 2 is arranged at the peak point of the vibration response amplitude of the airborne display unit 1, and generally selected at the peak point of the first three order modes of the airborne display module 1.

[0036] The particle damping vibration absorber unit 2 comprises an upper cover plate 2-1, damping particles 2-2, a damping pad 2-3, an elastic element 2-4, a gasket 2-5 and a base 2-6;

[0037] The damping pad 2-3 is arranged on the base 2-6, and the damping particles 2-2 are arranged between the damping pad 2-3 and the upper cover plate 2-1,

[0038] The elastic elements 2-4 are uniformly arranged around the base 2-6 and are nested in the mounting ears around the base 2-6 to achieve vibration response value attenuation on the airborne display unit 1, and the gasket 2-5 is further arranged on the elastic element 2-4.

[0039] The upper cover plate 2-1 and the base 2-6 are made of aluminum alloy material to ensure a certain rigidity and strength;

[0040] The damping particles 2-2 are composed of a plurality of spherical particles made of aluminum alloy, and the diameter of each aluminum alloy particle is in the range of 2mm to 4mm, and the filling rate of the damping particles 2-2 is set to 50% to 70%;

[0041] The damping particles 2-2 are arranged in the container surrounded by the damping pad 2-3, and spaces are arranged between the particles.

[0042] The damping pad 2-3 is high-adhesion and is pasted on the base 2-6 by back adhesive, the damping pad 2-3 is made of viscoelastic rubber, has the characteristics of small elastic modulus, large damping and large friction coefficient, is pasted in the inner cavity of the base 2-6 by back adhesive, the thickness of the damping pad 2-3 is 1mm, the loss factor is in the range of 0.2 to 0.4, and the damping pad 2-3 can play a role in vibration reduction and noise reduction.

[0043] The elastic unit 2-4 is divided into four groups and is symmetrically arranged around the particle damping vibration absorber 2, and the elastic element 2-4 comprises an upper support 2-4-1, a support column 2-4-2 and a lower support 2-4-3;

[0044] The support column 2-4-2 is arranged between the upper support 2-4-1 and the lower support 2-4-3;

[0045] The upper support 2-4-1 and the lower support 2-4-3 are made of silicone rubber material, and the support column 2-4-2 is made of stainless steel material;

[0046] The natural frequency of the entire elastic element 2-4 is 30Hz to 50Hz, the vibration reduction efficiency is greater than or equal to 55%, and the maximum displacement is less than or equal to 2mm.

[0047] The above-described embodiments are merely illustrative of several embodiments of the present application, which are described in more detail and in a specific manner, but should not be construed as limiting the scope of the patent. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A granular damping vibration absorbing device applied to an on-board display module, characterized in that, The onboard display unit (1) and the particle damping vibration absorber unit (2) are provided. The particle damping vibration absorber unit (2) is arranged on the onboard display unit (1).

2. The granular damping vibration isolation apparatus for an on-board display module according to claim 1, wherein The onboard display unit (1) comprises a structural assembly (1-1), a liquid crystal screen assembly (1-2), an optical assembly (1-3), a circuit assembly (1-4), and a backlight assembly (1-5), which are sequentially arranged.

3. The granular damping vibration isolation apparatus for an on-board display module according to claim 1, wherein The particle damping vibration absorber unit (2) is arranged at the peak point of the vibration response amplitude of the onboard display unit (1).

4. The granular damping vibration isolation device for an on-board display module according to claim 3, characterized in that, The particle damping vibration absorber unit (2) comprises an upper cover plate (2-1), damping particles (2-2), a damping pad (2-3), an elastic element (2-4), a gasket (2-5), and a base (2-6). The damping pad (2-3) is arranged on the base (2-6), and the damping particles (2-2) are arranged between the damping pad (2-3) and the upper cover plate (2-1). The elastic element (2-4) is uniformly arranged around the base (2-6) to attenuate the vibration response amplitude of the onboard display unit (1), and the gasket (2-5) is further arranged on the elastic element (2-4).

5. The granular damping vibration isolation device for an on-board display module according to claim 4, characterized in that, The upper cover plate (2-1) and the base (2-6) are made of aluminum alloy material. The damping particles (2-2) are composed of a plurality of spherical particles made of aluminum alloy material, and the diameter of each aluminum alloy particle ranges from 2mm to 4mm, and the filling rate of the damping particles (2-2) is set to 50% to 70%. The damping particles (2-2) are arranged in the container surrounded by the damping pad (2-3), and spaces are arranged between the particles.

6. The granular damping vibration isolation device for an on-board display module according to claim 4, wherein The damping pad (2-3) is high-adhesion and is pasted on the base (2-6) by adhesive, and the damping pad (2-3) is made of viscoelastic rubber and is pasted in the inner cavity of the base (2-6) by adhesive, the thickness of the damping pad (2-3) is 1mm, and the loss factor ranges from 0.2 to 0.

4.

7. The granular damping vibration isolation device for an on-board display module according to claim 4, wherein The elastic element (2-4) comprises an upper support (2-4-1), a support column (2-4-2), and a lower support (2-4-3). The support column (2-4-2) is arranged between the upper support (2-4-1) and the lower support (2-4-3). The upper support (2-4-1) and the lower support (2-4-3) are made of silicone rubber material, and the support column (2-4-2) is made of stainless steel material. The natural frequency of the entire elastic element (2-4) is 30Hz to 50Hz, the damping efficiency is greater than or equal to 55%, and the maximum displacement is less than or equal to 2mm.

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