Elastically-connected high-damping three-way shock absorber

Abstract

The elastically-connected high-damping three-way shock absorber comprises an outer shell (6) and a middle shaft (2), the outer shell (6) is in a barrel shape, the middle shaft (2) is installed at the barrel bottom through an axial supporting mechanism (14), a cylindrical inner shell (10) is embedded in the outer shell (6), the inner shell (10) is connected with the middle shaft (2) through a horizontal connecting piece, and the upper end of the middle shaft (2) penetrates out of the center of an upper end cover (3) of the outer shell (6); the outer shell (6), the inner shell (10) and the middle shaft (2) are of a rigid structure, and the horizontal connecting piece, the upper end cover (3) and the axial supporting mechanism (14) are of an elastic structure. The three-direction vibration reduction capacity is achieved, and axial, radial and torsional vibration energy can be absorbed through the structural design of the upper-layer horizontal connecting piece, the middle-layer horizontal connecting piece and the lower-layer horizontal connecting piece.

Description

Technical Field

[0001] This invention relates to the field of vibration reduction technology, and in particular to a flexible, high-damping triaxial vibration damper. Background Technology

[0002] In modern electronic equipment, communication systems, industrial control, aerospace, and marine applications, various chassis serve as carriers for core electronic components, making vibration and shock isolation crucial for their operating environment. The interior of a chassis typically contains delicate circuit boards, chips, hard drives, connectors, and other vulnerable components. These components are highly susceptible to vibration and shock loads from the external environment or the equipment itself during transportation and operation. Excessive vibration can lead to loose connections, signal interference, and performance degradation; in severe cases, it can cause fatigue damage, breakage, or even system failure, directly threatening the reliability and lifespan of the equipment. For vibration reduction in aerospace launch equipment, high-damping vibration dampers are a critical technology. Summary of the Invention

[0003] The purpose of this invention is to develop a high-damping three-way vibration damper with elastic connection for use in chassis, in order to solve the problem of vibration damage to chassis. This reduces the vibration characteristics of the chassis during operation or transportation.

[0004] The technical solution of this invention: A high-damping triaxial vibration damper with elastic connection includes an outer shell 6 and a central shaft 2. The outer shell 6 is barrel-shaped and the central shaft 2 is mounted on the bottom of the barrel through an axial support mechanism 14. A cylindrical inner shell 10 is nested inside the outer shell 6. The inner shell 10 is connected to the central shaft 2 through a horizontal connector. The upper end of the central shaft 2 passes through the center of the upper end cover 3 of the outer shell 6. The outer shell 6, the inner shell 10 and the central shaft 2 are rigid structures, while the horizontal connector, the upper end cover 3 and the axial support mechanism 14 are elastic structures.

[0005] The upper cover 3 is a ring structure, and the outer ring and the inner ring of the ring structure are connected by an arc-shaped elastic beam.

[0006] The outer ring of the upper end cover 3 is fixed to the outer shell 6, the inner ring of the upper end cover 3 is connected to the end cover fixing flange 5, and the upper end of the central shaft 2 passes through the end cover fixing flange 5.

[0007] The end cover fixing flange 5 is connected to the outer shell 6 via a horizontal connector, which is located below the upper end cover 3.

[0008] The axial support mechanism 14 consists of a central circular tray and elastic buckling beams around the tray. Multiple elastic buckling beams support the central circular tray, which is suspended in the air. The lower end of the central shaft 2 is fixed to the circular tray.

[0009] A slider 10 is installed on the inner wall of the outer shell 6, and the outer wall of the inner shell 10 is engaged with the slider 10.

[0010] The horizontal connector is made of metal rubber, metal rubber-silicone rubber composite, porous silicone rubber, honeycomb flexible composite, or triaxial flexible spring.

[0011] The horizontal connector has an overall shape of a disc with a hole in the middle. When not under force, the horizontal connector has a sparse, multi-pore structure, and the pores shrink when under force.

[0012] The inner wall of the inner housing 10 has a raised edge, and the outer circle of the horizontal connector is fixed to the raised edge by screws.

[0013] The outer shell 6 contains magnetorheological liquid.

[0014] The beneficial effects of this invention are: (1) It has three-dimensional vibration reduction capability. The structural design of the upper, middle and lower three-layer metal rubber can absorb axial, radial and torsional vibration energy.

[0015] (2) Magnetorheological fluid adaptive damping: The presence of magnetorheological fluid causes the liquid to be squeezed and generate a nonlinear damping peak under severe impact on the chassis, thus avoiding hard collisions with the structure.

[0016] (3) The core function of metal rubber: Metal rubber has both rigidity and elasticity, replacing traditional rubber seals that are prone to aging, extending their service life, and has wide temperature range adaptability, making it suitable for aerospace.

[0017] (4) The vibration damper uses metal rubber with high damping performance as the damping element. The organic combination of magnetorheological fluid and metal rubber damping element means that the damping of the vibration damper is variable when subjected to external loads, based on the porous structure of the metal rubber.

[0018] Applications: Vibration dampers are used for, but not limited to, chassis vibration reduction. They can be applied in aerospace, shipbuilding, shipborne, medical equipment, transportation and other fields. Attached Figure Description

[0019] Figure 1 This is a cross-sectional structural diagram of the vibration damper.

[0020] Figure 2 This is a schematic diagram of the cross-sectional structure of the vibration damper after adding magnetorheological fluid.

[0021] Figure 3 This is a perspective view of the three-dimensional structure of the vibration damper.

[0022] Figure 4 This is a schematic diagram of the installation and application of vibration dampers.

[0023] Figure 5 This is a 3D view of the shock absorber after installation.

[0024] Figure 6 This is a schematic diagram of the pore structure of metal rubber when it is not in use and is not subjected to external forces.

[0025] Figure 7 This is a schematic diagram of the pore structure of metal rubber when it is subjected to external force. Detailed Implementation

[0026] Example 1: This example includes three horizontal connectors: metal-rubber hinge 1 (4), metal-rubber hinge 2 (9), and metal-rubber hinge 3 (12). All three horizontal connectors are fabricated as disc structures with a centrally hollowed-out center. Metal-rubber is a novel material that combines elasticity and high damping properties. Its manufacturing process involves multiple steps, including spiral winding of metal wires (different grades and diameters), constant pitch stretching, blank preparation, cold stamping, and post-processing. The material's interior consists of interwoven metal wires forming a rubber-like polymer spatial network structure. Leveraging the helical characteristics of the metal wires and the inherent excellent physical and mechanical properties of metal, metal-rubber exhibits zero volatility (vacuum environment), excellent corrosion resistance, wide temperature range adaptability (high and low temperature resistance), and long fatigue life, enabling it to operate stably in various harsh environments. Therefore, metal-rubber has broad application prospects in aerospace (equipment vibration reduction), shipbuilding (equipment noise reduction), and precision instruments (impact protection). The high damping vibration reduction performance of metal-rubber makes it an ideal alternative to traditional materials.

[0027] like Figure 1 A high-damping triaxial vibration damper with a metal-rubber elastic connection includes: a flange 1, a central shaft 2, an end cap 3, a first metal-rubber hinge 4, an end cap fixing flange 5, an outer shell 6, a second metal-rubber hinge 9, an outer fixing ring of the second metal-rubber hinge 7, an inner fixing ring of the second metal-rubber hinge 8, an inner shell 10, a polytetrafluoroethylene slider 11, a third metal-rubber hinge 12, an outer fixing ring of the third metal-rubber hinge 13, an axial support mechanism 14, a bottom flange end cap 15, a bottom sealing end cap 16, and a sealing ring 17. The outer shell 6 is barrel-shaped, and the central shaft 2 is mounted on the bottom of the barrel through the axial support mechanism 14. A cylindrical inner shell 10 is nested inside the outer shell 6. The inner shell 10 is connected to the central shaft 2 through a horizontal connector. The upper end of the central shaft 2 protrudes from the center of the upper end cap 3 of the outer shell 6. The outer shell 6, the inner shell 10, and the central shaft 2 are rigid structures, while the horizontal connector, the upper end cap 3, and the axial support mechanism 14 are elastic structures.

[0028] Flange 1 is threaded onto the central shaft 2, and flange 1 is bolted onto the bottom plate of the chassis.

[0029] The upper end cover 3 is a ring structure consisting of an outer ring, an inner ring, and an arc-shaped elastic beam. The outer ring and inner ring of the ring structure are connected by the arc-shaped elastic beam. The outer edge of the upper end cover 3 is threaded to the inner thread of the outer shell 6. The inner ring of the upper end cover 3 is threaded to the end cover fixing flange 5. The metal rubber hinge 4 is installed between the upper end cover 3 and the end cover fixing flange 5 by bolts. The outer edge of the metal rubber hinge 4 is pressed against the inner wall step of the outer shell 6 by the outer ring of the upper end cover 3 and fixed by bolts. The inner edge of the metal rubber hinge 4 is pressed against the outer wall step of the end cover fixing flange 5 by the inner ring of the upper end cover 3 and fixed by bolts.

[0030] The inner side of the metal rubber hinge 2 9 is pressed against the shoulder of the middle section of the central shaft 2 by the inner fixing ring 8 of the metal rubber hinge 2, and the inner fixing ring 8 of the metal rubber hinge 2 is connected to the central shaft 2 by bolts; the outer edge of the metal rubber hinge 2 9 is pressed against the boss on the inner wall of the inner housing 10 by the outer fixing ring 7 of the metal rubber hinge 2 and fixed with bolts.

[0031] The outer circle of the metal-rubber hinge 12 is pressed against the boss of the inner housing 10 by the outer fixing ring 13 of the metal-rubber hinge 12 and fixed with bolts; the inner circle of the metal-rubber hinge 12 is pressed against the shoulder of the central shaft 2 by the bottom flange end cap 15 and fixed with bolts. The top of the axial support mechanism 14 is fixed to the bottom of the bottom flange end cap 15 with bolts, and the bolts simultaneously fix the axial support mechanism 14, the bottom flange end cap 15 and the metal-rubber hinge 12 to the central shaft 2.

[0032] The axial support mechanism 14 consists of a central circular tray and elastic buckling beams around the tray. The elastic buckling beams support the central circular tray, which is suspended in the air. The bottom end of the elastic buckling beams is fixed to the bottom surface inside the outer shell 6 by bolts. The axial support elastic buckling beams are designed to be four in number and installed at 90 degrees.

[0033] The polytetrafluoroethylene slider 11 is threaded onto the outer casing 6. Four sliders are designed and installed at 90 degrees on the side wall of the outer casing 6.

[0034] The bottom sealing end cap 16 is bolted to the bottom of the outer casing 6, and a sealing ring 17 is installed between the two for sealing the magnetorheological fluid.

[0035] Except for the metal rubber and polytetrafluoroethylene blocks, the outer shell 6 is made of stainless steel, and the remaining materials are made of aluminum alloy, which makes the entire shock absorber lightweight.

[0036] Example 2: A high-damping three-way vibration damper with a metal-rubber elastic connection for use in chassis is provided by the present invention to reduce the vibration level of the chassis. Its overall structure is as follows: Figure 4As shown, the chassis includes a top cover, left side panel, front panel, handle, right side panel, rear panel, bottom panel, and vibration damper. A cross-sectional view of the non-magnetic rheotropic fluid vibration damper is shown below. Figure 1 As shown, the overall structure of the vibration damper includes: flange 1, central shaft 2, upper end cover of arc-shaped elastic beam 3, horizontal connector 1 4, end cover fixing flange 5, outer shell 6, horizontal connector 2 9, outer fixing ring of horizontal connector 2 7, inner fixing ring of horizontal connector 2 8, inner shell 10, polytetrafluoroethylene slider 11, horizontal connector 3 12, outer fixing ring of horizontal connector 3 13, axial support mechanism 14, bottom flange end cover 15, bottom sealing end cover 16, and sealing ring 17.

[0037] Horizontal connector 1 (4), horizontal connector 2 (9), and horizontal connector 3 (12) are made of metal-rubber material, or metal-rubber-silicone rubber composite, porous silicone rubber, honeycomb flexible composite, three-way flexible spring, etc., but are not limited to these, and are all within the protection scope of this invention; axial support mechanism 14 can be replaced by an axial or radial spring, which can also achieve the effect of relieving impact, but is not limited to these, and are all within the protection scope of this invention.

[0038] The axial support mechanism 14 is first fixed to the bottom of the inner cavity of the outer shell 6 by bolts.

[0039] The outer fixing ring 7 and the inner fixing ring 8 of the second horizontal connector press the second horizontal connector 9 onto the central shaft 2 and the inner housing 10 boss; the outer fixing ring 7 of the second horizontal connector is installed on the inner housing 10 by operating the mounting hole 7-1 through a special tool, and the inner fixing ring 8 of the second horizontal connector is installed on the central shaft 2 by operating the mounting hole 1 through a special tool.

[0040] The horizontal connector 12 is pressed against the central shaft 2 and the inner housing 10 by the outer fixing ring 13 and the bottom flange end cap 15. The outer fixing ring 13 of the horizontal connector is installed on the inner housing 10 by operating the mounting hole 13-1 with a special tool. The external thread of the bottom flange end cap 15 is installed on the bottom internal thread of the central shaft 2 by operating the mounting hole 15-1 with a special tool.

[0041] The bottom flange end cover 15 is fixedly installed on the axial support mechanism 14 by bolts.

[0042] The bottom sealing end cap 16 presses the sealing ring 17 onto the outer casing 6 and is locked to the bottom of the outer casing 6 by bolts.

[0043] The inner diameter of the horizontal connector 4 is pressed together by the inner ring of the upper end cap 3 of the arc-shaped elastic beam and the end cap fixing flange 5. The outer diameter of the horizontal connector 4 is pressed onto the outer shell 6 by the outer ring of the upper end cap 3 of the arc-shaped elastic beam. The upper end cap 3 of the arc-shaped elastic beam is assembled onto the outer shell 6 by operating the mounting hole 3-1 through a special tool.

[0044] Flange 1 is screwed onto the top of the central shaft 2 by threads, and flange 1 is installed on the bottom surface of the chassis base plate by bolts.

[0045] The installation sequence of the entire vibration damper is now complete. The outer casing 6 is bolted to the workbench to dampen the entire chassis.

[0046] The entire shock absorber is filled with magnetorheological fluid 18. The fluid 18 is filled into the entire shock absorber through the inlet 2-1. The central shaft 2 is designed with an air vent 2-2, which is used to squeeze out air better when the shock absorber is working and compressing the fluid in the chamber. The central shaft 2 is designed with an outlet for the fluid to flow into the chamber.

[0047] The working principle of the entire shock absorber: When the chassis is subjected to a vertical impact force, the force is transmitted to the elastic buckling beam through the central axis. At this time, the buckling beam provides high stiffness. Due to the presence of magnetorheological fluid in the cavity, the fluid plays a good damping role, buffering the impact force and reducing vibration of the chassis. At the same time, during the vertical downward movement of the central axis, it drives the horizontal connecting parts 9 and 12, together with the inner shell 10, to move in the vertical direction. Since the polytetrafluoroethylene slider 11 has a low coefficient of friction, it can effectively reduce the friction force on the outside of the inner shell.

[0048] When the shock absorber's central shaft is not under load, the horizontal connecting piece 312 exhibits a relatively sparse, multi-pore structure, such as... Figure 6 As shown, when the central axis is subjected to an external force, the force is transmitted to the buckling beam through the central axis. Due to the presence of the magnetorheological fluid in the chamber, the central axis simultaneously drives the horizontal connector 2 9 and the horizontal connector 3 12 to move downwards. At this time, the pores of the metal rubber gradually decrease due to the force, as... Figure 7 As shown, at this time, the pressure in the lower chamber of the damper increases, the displacement rate of the central shaft decreases slowly, and the damping of the damper gradually increases. The magnetorheological fluid is compressed and enters the central chamber, and the damper plays a good buffering role. After the external excitation of the chassis disappears, the central shaft is pushed vertically upward due to the stiffness of the buckling beam, and part of the magnetorheological fluid in the central chamber enters the lower chamber.

[0049] Depending on the actual vibration reduction requirements, if it is necessary to improve the damping performance of the vibration damper, the magnetorheological fluid can be submerged above the horizontal connector 9. Both the horizontal connector 9 and the horizontal connector 12 simultaneously act as a buffer for the vibration damper.

[0050] When the chassis is subjected to a horizontal impact force, the displacement of the central axis will be in the horizontal direction. Due to the presence of the curved beam on the upper end cover 3 of the arc-shaped elastic beam, it plays a good supporting role. At the same time, the horizontal connector 1 4 is compressed along the horizontal normal direction, which plays a good buffering role. Meanwhile, the buckling beam 14 also plays a certain stiffness support role. The horizontal connector 2 9 and the horizontal connector 3 12 are compressed along the displacement side, which plays a good damping effect.

Claims

1. A high-damping triaxial vibration damper with elastic connection, comprising an outer shell (6) and a central shaft (2), characterized in that: The outer shell (6) is barrel-shaped and the bottom of the barrel is mounted on the central shaft (2) through the axial support mechanism (14). The outer shell (6) is nested with a cylindrical inner shell (10). The inner shell (10) is connected to the central shaft (2) through a horizontal connector. The upper end of the central shaft (2) passes through the center of the upper end cover (3) of the outer shell (6). The outer shell (6), the inner shell (10) and the central shaft (2) are rigid structures, while the horizontal connector, the upper end cover (3) and the axial support mechanism (14) are elastic structures.

2. The high-damping triaxial vibration damper with elastic connection according to claim 1, characterized in that: The upper cover (3) is a ring structure, and the outer ring and the inner ring of the ring structure are connected by an arc-shaped elastic beam.

3. The high-damping triaxial vibration damper with elastic connection according to claim 2, characterized in that: The outer ring of the upper end cover (3) is fixed on the outer shell (6), the inner ring of the upper end cover (3) is connected to the end cover fixing flange (5), and the upper end of the central shaft (2) passes through the end cover fixing flange (5).

4. The high-damping triaxial vibration damper with elastic connection according to claim 3, characterized in that: The end cap fixing flange (5) is connected to the outer shell (6) through a horizontal connector, which is located below the upper end cap (3).

5. The high-damping triaxial vibration damper with elastic connection according to claim 1, characterized in that: The axial support mechanism (14) consists of a central circular tray and elastic buckling beams around the tray. Multiple elastic buckling beams support the central circular tray, which is suspended in the air. The lower end of the central shaft (2) is fixed on the circular tray.

6. The high-damping triaxial vibration damper with elastic connection according to claim 1, characterized in that: The inner wall of the inner housing (10) has a raised edge, and the outer circle of the horizontal connector is fixed to the raised edge by screws.

7. The high-damping triaxial vibration damper with elastic connection according to claim 1, characterized in that: A slider (10) is installed on the inner wall of the outer shell (6), and the outer wall of the inner shell (10) is engaged with the slider (10).

8. The high-damping triaxial vibration damper with elastic connection according to any one of claims 1-7, characterized in that: The horizontal connector is made of metal rubber, metal rubber-silicone rubber composite, porous silicone rubber, honeycomb flexible composite, or triaxial flexible spring.

9. The high-damping triaxial vibration damper with elastic connection according to claim 8, characterized in that: The horizontal connector has an overall shape of a disc with a hole in the middle. When not under force, the horizontal connector has a sparse, multi-pore structure, and the pores shrink when under force.

10. The high-damping triaxial vibration damper with elastic connection according to claim 9, characterized in that: The outer shell (6) contains a magnetorheological liquid.

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