Horizontal frequency shock absorber
By designing a floating structure and inverted pendulum support components, combined with air film, partition plates, and viscous materials, the problem of insufficient frequency adaptability of airbag vibration dampers in horizontal frequency vibrations is solved, achieving stable vibration reduction effect over a wide frequency range and improving the reliability and durability of the vibration damper.
Patent Information
- Application Number
- CN202520680462.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-11
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2035-04-11
AI Technical Summary
Existing airbag vibration dampers have limited frequency adaptability when dealing with horizontal frequency vibrations, making it difficult to maintain a stable vibration reduction effect over a wide frequency range. Furthermore, their structural design and manufacturing process affect their reliability and durability, making them particularly unsuitable for applications requiring high vibration reduction performance, such as precision machinery.
The design employs a floating structure, including an inverted pendulum support component and an annular air membrane. Through the synergistic effect of positive and negative stiffness, combined with the working chamber and damping chamber separated by partition plates, the vibratory energy is dissipated by viscous substances, achieving multi-level vibration reduction.
It effectively reduces the horizontal frequency, improves the vibration reduction efficiency and stability of the vibration damper, enhances the vibration reduction effect over a wide frequency range, and ensures the stable operation of the equipment.
Smart Images
Figure CN223881606U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of shock absorber, especially a horizontal frequency shock absorber. BACKGROUND
[0002] In many industrial fields and daily life, vibration problems are widespread, and have important influence on the normal operation of equipment, the stability of structure and the comfort of personnel, etc. Especially in some vibration-sensitive scenes, such as the production environment of precision instruments.
[0003] At present, the common shock absorber on the market mainly adopts the air bag damping method in reducing the horizontal frequency. The working principle of air bag shock absorber is to use the compressibility of gas in air bag to absorb and buffer vibration energy. When the equipment or structure is subjected to horizontal vibration impact, the air bag will deform, and the gas will be compressed and expanded in the air bag, so as to convert the vibration energy into the internal energy of the gas, and achieve the purpose of damping.
[0004] However, the existing air bag shock absorber still has some deficiencies in dealing with horizontal frequency vibration. On the one hand, the frequency adaptability of air bag shock absorber is limited, and it is difficult to maintain stable damping effect in a wide frequency range; on the other hand, the structure design and manufacturing process of air bag shock absorber also affect its reliability and durability in actual application.
[0005] Especially in some applications with very high damping effect requirements, such as precision mechanical equipment, the existing air bag shock absorber is often difficult to meet the requirements.
[0006] Therefore, the present application develops a horizontal frequency shock absorber to solve the problems existing in the prior art. INVENTION CONTENTS
[0007] The utility model aims at providing a horizontal frequency shock absorber to solve the problem of insufficient air bag damping effect in the prior art
[0008] The technical scheme of the utility model is: a horizontal frequency shock absorber, comprising:
[0009] A shell;
[0010] A pressing plate fixedly arranged on the shell;
[0011] A floating structure, the floating structure internally comprises a support assembly of inverted pendulum structure, and the support assembly is in contact with the bottom surface of the floating structure, an annular air film is formed between the outer wall of the floating structure and the inner wall of the shell, and the shell is sealed, when the shell is inflated, the floating structure as a whole floats up without contact with the shell, and the air film expands to generate positive stiffness, which cooperates with the negative stiffness generated by the support assembly of inverted pendulum structure to reduce the horizontal frequency.
[0012] A bearing plate is fixed on the top of the support assembly and is arranged on the pressing plate.
[0013] Preferably, a ring-shaped plate is arranged vertically in the shell, the inner side region of the ring-shaped plate is an inner side space, the region between the outer side of the ring-shaped plate and the inner wall of the shell is an outer side space, the inner side space and the outer side space are communicated, the floating structure comprises a support part and a floating part, the lower part of the floating part is located in the inner side space and the upper part of the floating part is located in the outer side space, the lower end of the support part is in spherical surface contact with the bottom surface of the floating part, and a support assembly of an inverted pendulum structure is formed.
[0014] Preferably, the air film is arranged along the inner contour of the shell, and when the shell is inflated, the air film generates a horizontal force on the outer wall surface of the floating structure and the inner wall surface of the shell.
[0015] Preferably, a limiting plate is arranged in the inner side space, the limiting plate is arranged along the contour of the inner wall of the ring-shaped plate, the space below the limiting plate forms a chamber, the chamber is communicated with the inner side space, and when the floating part is floated, the bottom of the floating part is limited in the chamber by the limiting plate.
[0016] Preferably, a baffle is arranged on the outer wall surface of the floating part, the baffle is located above the limiting plate, and the floating part is supported by the baffle.
[0017] Preferably, a partition plate is arranged in the outer side space, the partition plate divides the outer side space into a working chamber and a damping chamber, the working chamber is communicated with the inner side space, the working chamber and the damping chamber are connected with valves, and the two valves are communicated through a pipeline.
[0018] Compared with the prior art, the utility model has the advantages that:
[0019] (1) the ring-shaped air film arranged between the outer wall of the floating structure and the inner wall of the shell will expand when inflated, generating positive stiffness; the spherical surface contact between the support part and the floating part forms a support assembly of an inverted pendulum structure, which has the characteristic of negative stiffness, the two kinds of stiffness are offset and balanced with each other, the horizontal frequency is effectively reduced, and the vibration damping purpose is achieved;
[0020] (2) the partition plate is arranged in the outer side space, the outer side space is divided into a working chamber and a damping chamber, the damping chamber and the working chamber are communicated through a valve and a pipeline, when the floating structure is excited by external vibration, the vibration energy of the working chamber is transmitted to the damping chamber through the pipeline, the vibration amplitude and energy of the floating structure are effectively reduced, and the vibration damping efficiency of the damper is improved;
[0021] (3) In the outer wall surface of the floating part, a baffle is arranged, a space is reserved for the chamber, and a viscous substance (such as silicon oil) is added in the chamber. When the floating part moves due to the pulse force generated by the equipment starting, the viscous substance can generate a larger damping effect on the floating part, rapidly consume the energy brought by the pulse force, and enable the floating structure to quickly reach a stable state. BRIEF DESCRIPTION OF DRAWINGS
[0022] The utility model will be further described below in combination with the drawings and embodiments:
[0023] Figure 1 It is the side sectional view of the embodiment two of the utility model;
[0024] Figure 2 It is the three-dimensional schematic view of the embodiment two of the utility model;
[0025] Figure 3 It is the structural sectional view of the embodiment two of the utility model;
[0026] Figure 4 It is the side sectional view of the embodiment three of the utility model;
[0027] Figure 5 It is the structural sectional view of the embodiment three of the utility model;
[0028] Figure 6 It is the three-dimensional schematic view of the embodiment three of the utility model;
[0029] Figure 7 It is the side sectional view of the embodiment one of the utility model.
[0030] Wherein: 1, shell, 11, inner space, 12, outer space, 121, working chamber, 122, damping chamber, 13, chamber, 2, pressing plate, 3, floating structure, 31, support assembly, 32, air film, 33, support part, 34, floating part, 4, bearing plate, 5, annular plate, 6, limit plate, 7, baffle, 8, partition plate, 9, valve. DETAILED DESCRIPTION
[0031] The content of the utility model will be further described in detail below in combination with specific embodiments:
[0032] For example, Figures 1-3As shown, a horizontal frequency damper includes a shell 1, a pressing plate 2, a floating structure 3 and a bearing plate 4, wherein the pressing plate 2 is fixed on the shell 1 and tightly presses the air film 32 cooperating with the floating part 34 to seal the shell 1, inside the shell 1, an annular plate 5 is vertically arranged, the inside area of the annular plate 5 is an inside space 11, the area between the outside of the annular plate 5 and the inner wall of the shell 1 is an outside space 12, and the inside space 11 and the outside space 12 are communicated, when the shell 1 is filled with air, the inside space 11 and the outside space 12 are both filled with air, and the floating structure 3 is located in the inside space 11 and the outside space 12, so that the floating structure 3 is subjected to more uniform air pressure during the air filling process, thereby more stably floating up, avoiding the problem of unstable floating caused by uneven air pressure, and improving the damping performance of the damper; the floating structure 3 includes a supporting part 33 and a floating part 34. Wherein, the lower part of the floating part 34 is located in the inside space 11, and the upper part is located in the outside space 12, so that the floating part 34 can realize stable floating state under the action of air pressure in different chambers.
[0033] Specifically, the lower end of the supporting part 33 is in spherical contact with the bottom surface of the floating part 34, and the spherical contact forms a support assembly 31 of the inverted pendulum structure, when the shell 1 is filled with air, the floating structure 3 will float up as a whole due to the action of air pressure, at this time it is no longer in direct contact with the shell 1, with the filling of air, the annular air film 32 arranged between the outer wall of the floating structure 3 and the inner wall of the shell 1 will expand, the expanded air film 32 will generate positive stiffness, and the support assembly 31 of the inverted pendulum structure itself has the characteristic of negative stiffness, the two kinds of stiffness will cooperate, offset and balance each other, thereby effectively reducing the horizontal frequency and achieving the purpose of damping.
[0034] The bearing plate 4 is fixedly arranged on the top of the support assembly 31 and is loaded on the pressing plate 2, for bearing the external load and transmitting the weight of the load to the support assembly 31, and then realizing the horizontal damping of the load through the whole damper.
[0035] Further, the air film 32 is arranged along the inner contour of the shell 1, when the shell 1 is filled with air, with the gradual increase of air pressure, the air film 32 will expand and fill the space between the outer wall of the floating structure 3 and the inner wall of the shell 1, at this time, the air film 32 will generate horizontal force to the floating structure 33, when the floating structure 3 moves horizontally due to vibration, the air film 32 will generate reverse force to the floating structure 3, so as to reduce the horizontal frequency of the floating structure 3, thereby realizing effective damping effect.
[0036] Embodiment one:
[0037] As Figure 7As shown, the floating structure 3 is placed on the bottom surface of the shell 1, and a limiting plate 6 is provided in the inner space 11. The limiting plate 6 is arranged along the inner wall contour of the annular plate 5, dividing the space below the limiting plate 6 to form a chamber 13. The chamber 13 and the inner space 11 are interconnected, ensuring that the gas can flow freely between the two, so that the floating structure 3 can float when it is inflated through the valve 9.
[0038] Furthermore, the bottom of the floating part 34 is square, and the inner contour of the limiting plate 6 is also square, and its area is larger than that of the bottom of the floating part 34, so that the bottom of the floating part 34 passes through the limiting plate 6 and is located in the cavity 13. However, the diagonal length of the bottom of the floating part 34 is greater than the side length of the limiting plate 6. When the bottom of the floating part 34 is located in the cavity 13, the floating part 34 is rotated, and the larger diagonal length of the bottom of the floating part 34 limits the floating part 34, preventing the floating structure 3 from floating too high. This allows the positive stiffness of the air film 32 and the negative stiffness of the support component 31 of the inverted pendulum structure to work together within a suitable range, so as not to affect the stability of the shock absorber.
[0039] Example 2:
[0040] like Figures 1-3 As shown, a partition plate 8 is installed inside the outer space 12, dividing the outer space 12 into two parts: a working chamber 121 and a damping chamber 122. The working chamber 121 is interconnected with the inner space 11, allowing gas to flow freely between the inner space 11 and the working chamber 121. This ensures the balance and coordinated operation of the air pressure inside the entire shock absorber. When the shock absorber is working, the damping chamber 122 is connected to the working chamber 121 via a valve 9 and a pipeline. The gas flow and pressure changes inside the damping chamber 122 affect the damping characteristics of the entire system. When the floating structure 3 is subjected to external vibration excitation and moves, it causes pressure fluctuations in the gas inside the working chamber 121, thereby generating vibration energy. This vibration energy is transferred from the working chamber 121 to the damping chamber 122 through the pipeline, effectively reducing the vibration amplitude and energy of the floating structure 3 and improving the damping efficiency of the shock absorber.
[0041] Example 3:
[0042] like Figures 4-6As shown, the baffle 7 is arranged on the outer wall surface of the floating part 34, and the position of the baffle 7 is above the limiting plate 6. When the damper is in the uncharged state, the floating part 34 is supported by the baffle 7, and the floating part 34 can be stably placed on the baffle 7. At the same time, enough space is reserved for the chamber 13, and the shell 1 is charged by the valve 9. When the equipment above the bearing plate 4 is started, a large pulse force will be generated. In order to make the equipment quickly stabilize, viscous substances such as common viscous fluids such as silicon oil are added in the chamber 13. After adding the viscous substances, the bottom surface of the floating part 34 is covered. When the floating part 34 moves due to the pulse force generated by the start of the equipment, the viscous substances will generate a large damping effect on the floating part 34. The energy brought by the pulse force is rapidly consumed through the damping, so that the floating structure 3 can quickly reach a stable state, thereby ensuring the stable operation of the damper and the equipment.
[0043] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. For those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or basic characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.
Claims
1. A horizontal frequency vibration damper, characterized in that, include: Shell (1); Pressure plate (2) is fixedly mounted on the housing (1); The floating structure (3) includes a support component (31) for an inverted pendulum structure inside, and the support component (31) is in contact with the bottom surface of the floating structure (3). An annular air film (32) is formed between the outer wall of the floating structure (3) and the inner wall of the shell (1), and the shell (1) is sealed. When air is filled into the shell (1), the floating structure (3) floats up as a whole and has no contact with the shell (1). The air film (32) expands to generate positive stiffness, which works in conjunction with the negative stiffness generated by the support component (31) of the inverted pendulum structure to reduce the horizontal frequency. The support plate (4) is fixed on the top of the support assembly (31) and mounted on the pressure plate (2).
2. A horizontal frequency vibration damper according to claim 1, characterized in that: An annular plate (5) is vertically arranged inside the shell (1). The inner area of the annular plate (5) is the inner space (11), and the area between the outer side of the annular plate (5) and the inner wall of the shell (1) is the outer space (12). The inner space (11) and the outer space (12) are connected. The floating structure (3) includes a support part (33) and a floating part (34). The lower part of the floating part (34) is located in the inner space (11), and the upper part is located in the outer space (12). The lower end of the support part (33) is in spherical contact with the bottom surface of the floating part (34) to form a support component (31) of the inverted pendulum structure.
3. A horizontal frequency vibration damper according to claim 2, characterized in that: The air film (32) is arranged along the inner contour of the shell (1). When air is injected into the shell (1), the air film (32) generates a horizontal force on the outer wall surface of the floating structure (3) and the inner wall surface of the shell (1).
4. A horizontal frequency vibration damper according to claim 2, characterized in that: A limiting plate (6) is provided in the inner space (11). The limiting plate (6) is arranged along the inner wall contour of the annular plate (5), so that a cavity (13) is formed in the space below the limiting plate (6), and the cavity (13) is connected to the inner space (11). When the floating part (34) floats up, the bottom of the floating part (34) is restricted in the cavity (13) by the limiting plate (6).
5. A horizontal frequency damper according to claim 4, characterized in that: The outer wall of the floating part (34) is provided with a baffle (7), which is located above the limiting plate (6) and supports the floating part (34).
6. A horizontal frequency vibration damper according to claim 2, characterized in that: The outer space (12) is provided with a partition plate (8), which divides the outer space (12) into a working chamber (121) and a damping chamber (122). The working chamber (121) is connected to the inner space (11). Both the working chamber (121) and the damping chamber (122) are connected to valves (9), and the two valves (9) are connected through pipelines.