Vibration damping device installed in unconstrained state

Abstract

The invention provides a vibration reduction device installed in an unconstrained state, and belongs to the technical field of airborne electronic equipment vibration reduction, the vibration reduction device comprises a shell, a bottom plate, multiple air bag vibration reduction assemblies and locking nuts, the shell and the bottom plate form a containing cavity used for containing equipment subjected to vibration reduction, the multiple air bag vibration reduction assemblies are arranged in the containing cavity, and the locking nuts are arranged in the containing cavity. The multiple air bag vibration reduction assemblies support the equipment to be subjected to vibration reduction, and the air bag vibration reduction assemblies are fixed to the shell and the bottom plate through locking nuts. According to the damping device, equipment can be installed in an unconstrained state, the damping device is suitable for equipment which is not provided with an installation interface and has vibration isolation and buffering requirements, by means of the damping device, the influences of vibration, impact and other environmental working conditions can be effectively reduced, the use safety and reliability of the equipment are improved, and the service life of the equipment is prolonged.

Description

Technical Field

[0001] The present application belongs to the technical field of vibration reduction of airborne electronic equipment, and in particular relates to a vibration reduction device installed in an unconstrained state. Background Art

[0002] With the rapid development of aviation equipment, it has shown a trend of intelligentization, refinement, integration and modularization, and has also put forward higher requirements for the adaptability of aviation equipment to working conditions, especially the use environment of electronic information, optoelectronics and other equipment is becoming more and more harsh, and the precision requirements are getting higher and higher. Aircraft will produce strong vibrations during flight, so new vibration reduction devices are needed to adapt to the vibration reduction needs of higher-level aviation equipment.

[0003] The vibration reduction devices in the prior art are usually metal wire mesh, metal rubber, rubber and other vibration isolators. These vibration isolators have good vibration isolation and buffering effects. Usually, the vibration isolators and equipment need to be installed in the form of screw connection, which can be applied to upright and inverted environments. In practical applications, metal wire mesh and metal rubber vibration isolators have low lateral stiffness due to the limitations of lateral structural design, and it is difficult to achieve three-dimensional equal stiffness design; rubber vibration isolators can use finite element analysis methods to perform multiple rounds of iterative analysis on the structure to achieve three-dimensional equal stiffness structure design.

[0004] Therefore, it is hoped that there is a vibration reduction device that can fully consider the limitations of the installation of the vibration-damped module, has a simple structure and is easy to implement; the internal structure is symmetrical and can achieve three-way equal stiffness design; it is suitable for any installation form in space; and at the same time, a combined damping mechanism is introduced to have better vibration isolation and buffering capabilities against environmental vibrations and impacts. Summary of the invention

[0005] The purpose of the present application is to provide a vibration reduction device installed in an unconstrained state to solve or alleviate at least one problem in the background technology.

[0006] The technical solution of the present application is: a vibration reduction device installed in an unconstrained state, comprising: a shell, a base plate, an airbag vibration reduction assembly and a locking nut, the shell and the base plate constitute a cavity for accommodating the vibration-reduced device, the airbag vibration reduction assembly is multiple and arranged in the cavity, the multiple airbag vibration reduction assemblies support the vibration-reduced device, and the airbag vibration reduction assembly is fixed to the shell and the base plate by a locking nut.

[0007] In an optional embodiment of the present application, the shell is a cylindrical structure whose side surface is a polyhedron, and airbag mounting holes for mounting an airbag vibration reduction assembly are provided on the side surface and the top surface of the shell.

[0008] In an optional embodiment of the present application, the shell has more than 6 side surfaces and an even number, a hollow surface is arranged between two adjacent side surfaces, and the airbag mounting hole is arranged on a non-hollow surface.

[0009] In an optional embodiment of the present application, the airbag vibration reduction assembly includes a mounting block and an airbag ball, wherein the mounting block is fixedly connected to the airbag ball for fixing the airbag ball, and the airbag ball is used to support the vibration-reduced device.

[0010] In an optional implementation manner of the present application, the airbag ball is made of rubber material.

[0011] In an optional implementation manner of the present application, the mounting block includes a flat mounting block body and a threaded rod fixed on the mounting block body.

[0012] In an optional embodiment of the present application, the mounting block and the airbag ball are fixed by vulcanization.

[0013] In an optional embodiment of the present application, the airbag ball is provided with a support end adapted to the shape of the vibration-damped device on one side of the airbag ball supporting the vibration-damped device, and the support end is provided with at least one damping hole connected to the internal cavity of the airbag ball.

[0014] In an optional embodiment of the present application, the frequency adjustment of the vibration-damped device is achieved by adjusting the shape of the internal cavity of the airbag ball, the thickness of the cavity wall, and the size and number of the damping holes.

[0015] In an optional embodiment of the present application, an adjustment gasket is also included, which is arranged between the airbag vibration damping assembly and the shell and / or the base plate. By using adjustment gaskets of different thicknesses to adjust the internal installation space size of the cavity, the deformation of the airbag ball is adjusted to obtain different supporting loads.

[0016] This application allows the equipment to be installed in an unconstrained state, and is suitable for equipment that has no installation interface and has vibration isolation and buffering requirements. By using this vibration reduction device, the impact of environmental conditions such as vibration and impact can be effectively reduced, the safety and reliability of the equipment can be improved, and the service life of the equipment can be extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution provided by the present application, the following is a brief introduction to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present application.

[0018] Figure 1 This is a general schematic diagram of the unconstrained vibration reduction device of the present application.

[0019] Figure 2 This is a schematic diagram of the interior of the unconstrained vibration reduction device of the present application.

[0020] Figure 3 This is a schematic diagram of the shell of this application.

[0021] Figure 4 This is a cross-sectional view of the shell of this application.

[0022] Figure 5 This is a schematic diagram of the airbag vibration reduction assembly of the present application.

[0023] Figure 6 This is an appearance diagram of the airbag vibration reduction assembly of this application.

[0024] Figure 7 This is a schematic diagram of the base plate of this application.

[0025] Reference numerals:

[0026] 1- Shell

[0027] 11-Airbag mounting hole

[0028] 12-Hollow surface

[0029] 13- Shell flange mounting hole

[0030] 2- Bottom plate

[0031] 21- Bottom plate flange mounting hole

[0032] 22-Mounting boss

[0033] 23- Bottom plate airbag installation hole

[0034] 3-Airbag vibration reduction assembly

[0035] 31-Mounting Block

[0036] 32-Ball Ball

[0037] 311-Mounting block body

[0038] 312-Threaded Rod

[0039] 321-Support end

[0040] 322- Damping hole

[0041] 4- Lock nut

[0042] 5- Adjust the shims DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the implementation of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below in conjunction with the drawings in the embodiments of this application.

[0044] In order to reduce the impact of environmental conditions such as vibration and impact on precision electronic equipment in a limited space, improve the safety and reliability of equipment use, and extend the service life of the equipment, the present application provides a vibration reduction device that can be installed in an unconstrained state.

[0045] Figures 1 to 7 As shown, the unconstrained state vibration reduction device provided by the present application includes a housing 1, a base plate 2, an airbag vibration reduction assembly 3 and a locking nut 4. The housing 1 and the base plate 2 form a cavity for accommodating precision electronic equipment (i.e., the vibration-reduced equipment, not shown), and there are multiple airbag vibration reduction assemblies 3, which are arranged in the cavity and mounted on the housing 1 and the base plate 2, and fixed by the locking nut 4. Multiple airbag vibration reduction assemblies 3 tightly support the precision electronic equipment, thereby providing vibration reduction for it.

[0046] The shell 1 in the present application is a cylindrical structure with a polyhedral side, with airbag mounting holes 11 on the side and top surface, and a flange extending outward on the bottom side, on which a shell flange mounting hole 13 connected to the bottom plate 2 is provided. In the preferred embodiment of the present application, the shell 1 is usually a structure with an even number of sides greater than 6, with a hollow surface 12 provided between two adjacent side surfaces, and the airbag mounting hole 11 is provided on the non-hollow surface. For example, in the illustrated embodiment of the present application, the shell 1 is an octahedral structure, with a hollow surface between two adjacent side surfaces, so that mounting holes are provided on the remaining four side surfaces and the top surface.

[0047] The airbag vibration reduction assembly 3 includes a mounting block 31 and an airbag ball 32. The mounting block 31 is used to fix the airbag ball 32, and includes a mounting block body 311 and a threaded rod 312 fixedly arranged on the mounting block body 311. In some embodiments of the present application, the mounting block body 311 and the threaded rod 312 can be fixed into a whole by welding. The mounting block body 311 is a flat plate structure, and is fixed together with the airbag ball 32 by vulcanization.

[0048] The airbag ball 32 is a structure with a hollow interior. One side of the airbag ball 32 is fixed to the mounting block 31, and the other side of the airbag ball 32 is used to support precision electronic equipment. The support end 321 of the airbag ball 32 is adapted to the shape of the precision electronic equipment, and the support end 321 is provided with at least one damping hole 322 connected to the interior of the airbag ball 32. For example, in this embodiment of the present application, the shape of the precision electronic equipment is a rectangular structure, and the support end 321 of the airbag ball 32 is configured as a planar structure to closely fit and support the precision electronic equipment; if the shape of the precision electronic equipment is circular, the support end 321 of the airbag ball 32 can be configured as an arc structure.

[0049] In the preferred embodiment of the present application, high and low frequency designs can be achieved by designing different cavity shapes, cavity wall thicknesses, and sizes and numbers of damping holes 322. Furthermore, the airbag ball 32 can be made of rubber material.

[0050] The bottom plate 2 includes bottom plate flange mounting holes 21 arranged around it and adapted to the housing flange mounting holes 13. The bottom plate 2 can be fixedly connected to the housing 1 by connecting bolts passing through the housing flange mounting holes 13 and the bottom plate flange mounting holes 21. A mounting boss 22 is provided at the center of the bottom plate 2. A bottom plate airbag mounting hole 23 is provided at the center of the mounting boss 22. The airbag damping assembly 3 can be mounted on the bottom plate airbag mounting hole 23.

[0051] In addition, the unconstrained state vibration reduction device of the present application also includes an adjustment gasket 5, which is arranged between the airbag vibration reduction assembly 3 and the shell 1 or between the airbag vibration reduction assembly 3 and the base plate 2. By using adjustment gaskets 5 of different thicknesses to adjust the size of the internal installation space, the deformation of the airbag ball 32 of the airbag vibration reduction assembly 3 is adjusted to obtain different support loads and achieve adjustable stiffness.

[0052] Combination Figures 1 to 7 As shown, the installation process of the vibration reduction device installed in an unconstrained state of the present application is as follows:

[0053] S10, pass the threaded rod 312 of the airbag damping assembly 3 through the adjusting gasket 5 and the airbag mounting hole 11 on the top surface of the shell 1 in sequence, so that the mounting block body 311 of the airbag damping assembly 3 is completely fitted with the adjusting gasket 5 and the top surface of the shell 1, install the locking nut 4 to the threaded rod 312 and tighten it, and complete the installation of the top airbag damping assembly 3.

[0054] S20, the threaded rod 312 of the airbag vibration reduction assembly 3 is sequentially passed through the adjustment gasket 5 and the airbag mounting hole 11 on the side of the housing 1, so that the mounting block body 311 of the airbag vibration reduction assembly 3 is completely fitted with the adjustment gasket 5 and the side of the housing 1, and the locking nut 4 is installed on the threaded rod 312 and tightened. The same assembly method as above is used to install the airbag vibration reduction assemblies 3 on the remaining multiple sides, and the side installation of the airbag vibration reduction assembly 3 is completed.

[0055] S30, pass the threaded rod 312 of the airbag damping assembly 3 through the adjusting gasket 5 and the base plate airbag mounting hole 23 on the base plate 2 in sequence, so that the mounting block body 311 of the airbag damping assembly 3 is completely fitted with the adjusting gasket 5 and the mounting boss 22 of the base plate 2, install the locking nut 4 to the threaded rod 312 and tighten it, and complete the installation of the airbag damping assembly 3 and the base plate 2.

[0056] S40, place the precision electronic device to be damped in the middle of the shell 1 on which the top and side airbag vibration damping components 3 have been assembled, so that the upper surface of the precision electronic device is tightly fitted with the support end 321 of the top airbag vibration damping component 3, and the side of the precision electronic device is tightly fitted with the support ends 321 of the airbag vibration damping components 3 on the surrounding sides; connect the bottom plate 2 on which the bottom airbag vibration damping component 3 has been assembled to the shell 1 through a connector, so that the lower surface of the precision electronic device is tightly fitted with the support end 321 of the bottom airbag vibration damping component 3.

[0057] After the shell 1 and the bottom plate 2 are assembled with the six airbag vibration reduction components 3, a three-dimensional space fully surrounded by the airbag vibration reduction components 3 is formed inside, and the precision electronic equipment to be damped is placed in the space, and the upper and lower parts and the surrounding sides of the precision electronic equipment are tightly fitted with the support ends 321 of the airbag vibration reduction components 3. The six airbag vibration reduction components 3 inside are distributed in a completely symmetrical structure from top to bottom and from left to right, and the support stiffness and damping of the precision electronic equipment in all directions are the same, realizing a spatial equal stiffness design.

[0058] When the precision electronic device moves upward due to vibration, it squeezes the airbag vibration damping assembly 3 on the top; when it moves downward, it squeezes the airbag vibration damping assembly 3 on the bottom; when it moves sideways, it squeezes the airbag vibration damping assembly 3 on the side. The air in the air cavity inside the airbag vibration damping assembly 3 is squeezed. When the squeezing force exceeds a certain value, the internal air can flow out from the damping hole 322 to provide small hole damping; the airbag vibration damping assembly 3 is made of rubber material and is squeezed to provide polymer material damping. The airbag vibration damping assembly 3 dissipates vibration energy through small hole damping and polymer material damping during movement. This combined damping can improve the energy dissipation and vibration reduction effect, and the airbag vibration damping assembly 3 plays a supporting role. The airbag vibration damping assembly 3 is a flexible element with a certain degree of stiffness and damping. After the precision electronic equipment is installed, the surface of the precision electronic equipment is tightly fitted with the support ends 321 of the airbag vibration damping assembly 3 in multiple directions. The various surfaces of the precision electronic equipment provide axial pre-pressure to the airbag ball 32 of the fitted airbag vibration damping assembly 3 through the support ends 321. The airbag ball 32 is deformed and provides support load to the various surfaces of the precision electronic equipment through the support ends 321 in the reverse direction. The precision electronic equipment can be stably supported in this space.

[0059] The vibration reduction device provided by the present application installed in an unconstrained state has the following advantages:

[0060] 1) The functional modules are clear and the structure is simple, which can effectively solve the needs of using precision electronic equipment or modules in limited space and with consistent functions;

[0061] 2) The fully enclosed internal structure enables the vibration reduction device to have good full-space equal stiffness characteristics during vibration use, and can be installed in the form of front installation, side installation, inverted installation, etc., and the stiffness can be adjusted;

[0062] 3) The air spring mechanism is adopted. In a vibration environment, the air spring small hole damping is combined with the rubber material's own damping characteristics to form a combined damping structure to achieve a high damping design, store and absorb the vibration energy peak, and effectively suppress the peak load of resonance.

[0063] 4) The airbag structure made of high damping performance rubber material is used to improve the structural stability and performance stability of the vibration reduction device. At the same time, the rubber type (isotropic continuous medium) design method is adopted to achieve high and low frequency design;

[0064] This application allows the equipment to be installed in an unconstrained state, and is suitable for equipment that has no installation interface and has vibration isolation and buffering requirements. By using this vibration reduction device, the impact of environmental conditions such as vibration and impact can be effectively reduced, the safety and reliability of the equipment can be improved, and the service life of the equipment can be extended.

[0065] The unconstrained state installed vibration reduction device of the present application is suitable for satellite-borne, airborne, ship-borne, missile-borne and other vibration isolation and buffering fields that have high requirements for frequency stability and high requirements for vibration isolation and buffering performance.

[0066] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A vibration reduction device installed in an unconstrained state, characterized in that: include: A shell, a base plate, an airbag vibration damping assembly and a locking nut, wherein the shell and the base plate form a cavity for accommodating a vibration-damped device, the airbag vibration damping assembly is multiple and arranged in the cavity, the multiple airbag vibration damping assemblies support the vibration-damped device, and the airbag vibration damping assembly is fixed to the shell and the base plate by a locking nut.

2. The vibration reduction device installed in an unconstrained state according to claim 1, characterized in that: The shell is a cylindrical structure whose side surface is a polyhedron, and airbag mounting holes for mounting an airbag vibration reduction component are arranged on the side surface and the top surface of the shell.

3. The vibration reduction device installed in an unconstrained state according to claim 2, characterized in that: The shell has more than 6 side surfaces and an even number, a hollow surface is arranged between two adjacent side surfaces, and the airbag mounting hole is arranged on a non-hollow surface.

4. The vibration reduction device installed in an unconstrained state according to claim 1, characterized in that: The airbag vibration reduction assembly comprises a mounting block and an airbag ball. The mounting block is fixedly connected to the airbag ball and is used to fix the airbag ball. The airbag ball is used to support the vibration-reduced equipment.

5. The vibration reduction device installed in an unconstrained state according to claim 4, characterized in that: The air bag ball is made of rubber material.

6. The vibration reduction device installed in an unconstrained state according to claim 4, characterized in that: The mounting block comprises a flat mounting block body and a threaded rod fixed on the mounting block body.

7. The vibration reduction device installed in an unconstrained state according to any one of claims 4 to 6, characterized in that: The mounting block and the airbag ball are fixed by vulcanization.

8. The vibration reduction device installed in an unconstrained state according to claim 7, characterized in that: A support end adapted to the shape of the device to be damped is provided on one side of the airbag ball supporting the device to be damped, and at least one damping hole communicating with the inner cavity of the airbag ball is provided on the support end.

9. The vibration reduction device installed in an unconstrained state according to claim 8, characterized in that: The frequency adjustment of the vibration-damped equipment is achieved by adjusting the shape of the internal cavity of the airbag ball, the thickness of the cavity wall, and the size and number of the damping holes.

10. The vibration reduction device installed in an unconstrained state according to claim 9, characterized in that: It also includes an adjustment gasket, which is arranged between the airbag vibration reduction assembly and the shell and / or the base plate. By using adjustment gaskets of different thicknesses to adjust the internal installation space size of the cavity, the deformation of the airbag ball is adjusted to obtain different supporting loads.

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