Mechanical enhancement type particle damping vibration isolator

Abstract

The mechanical enhancement type particle damping vibration isolator comprises a base, a main mass part is movably connected to the base, the main mass part is connected with the base through a positive stiffness spring, a lever is further connected between the main mass part and the base through a flexible hinge mechanism, and a damping mechanism is connected to the end of the lever. The vibration isolation device is simple in structure, convenient to operate and easy to maintain, the flexible hinge mechanism is introduced, abrasion, friction, gaps and lubrication requirements are eliminated, then the lever is introduced to enable the vibration isolation device to achieve inertia amplification of inertia mass, meanwhile, on the basis, the particle damping container is introduced, particle damping is added into the container, and therefore the vibration isolation effect is improved. According to the particle damping, system vibration energy is consumed through collision and friction between particle damping and between damping particles and the inner wall of a particle damping container, so that the purpose of vibration reduction is achieved, and then the effect of vibration suppression is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of vibration control, and in particular to a mechanically enhanced particle damping vibration isolator suitable for a low-frequency vibration isolation system. Background Art

[0002] Vibration is a common phenomenon in nature and engineering. Most vibrations exhibit broadband, multi-line spectrum characteristics. In many cases, vibration is considered a negative factor that requires effective control. While advances in vibration theory and technology have significantly addressed high-frequency vibration, controlling low-frequency, multi-line spectrum, and broadband vibrations remains a challenge.

[0003] Current control methods can be divided into active control, semi-active control, and passive control, depending on whether external energy is required. Active control methods can achieve good control effects for low-frequency vibrations, but they require external energy, have high algorithm requirements, and are large in size. Currently, they are rarely used alone. Semi-active control methods, on the other hand, require only a small amount of energy to adjust damping or stiffness to achieve effects close to active control, but they have a slower response speed and increase the complexity of the system. For low-frequency control, traditional passive control methods have a simple structure and low cost, but they suffer from a large mass ratio. Dynamic anti-resonance structures can suppress low-frequency vibrations with a smaller mass by introducing a lever. However, the introduction of the lever exacerbates the aging and wear of the isolation material, resulting in a weakened isolation effect or even failure. Therefore, there is an urgent need to develop a vibration isolation device with low friction, good performance, and low maintenance costs. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a mechanically enhanced particle damping vibration isolator with a reasonable design and the introduction of a flexible lever mechanism, which greatly reduces the wear, friction, clearance and lubrication requirements between the vibration isolation devices, and combines the particle damping characteristics to significantly improve the low-frequency vibration isolation performance.

[0005] The present invention is implemented by the following scheme: a mechanically enhanced particle damping vibration isolator: including a base, a main mass member movably connected to the base, the main mass member and the base are connected via a positive stiffness spring, a lever is also connected between the main mass member and the base via a flexible hinge mechanism, and a damping mechanism is connected to the end of the lever.

[0006] Furthermore, the flexible hinge mechanism includes a main mass connector and a bottom connector. A lever connector is connected between the main mass connector and the bottom connector via a leaf spring. One end of the lever is fixed on the lever connector, and the other end is connected to the damping mechanism. The bottom connector is fixed on the base, and the main mass connector is installed under the main mass connector.

[0007] Furthermore, the lever connecting member includes a Z-shaped connecting member and a lever fixing block. One end of the Z-shaped connecting member is connected to the bottom connecting member via a vertically arranged first leaf spring, and the other end is connected to the lever fixing block. A vertically arranged second leaf spring is clamped in the connection between the Z-shaped connecting member and the lever fixing block. The upper end of the second leaf spring is fixedly connected to the main mass connecting member, and one end of the lever is fixed on the lever fixing block.

[0008] Furthermore, the main mass connecting member is T-shaped, with the horizontal part of the main mass connecting member at the top and the vertical part at the bottom. The horizontal part of the main mass connecting member is installed under the main mass member, and the vertical part of the main mass connecting member is connected to the second leaf spring.

[0009] Furthermore, a line connecting the centers of the first leaf spring and the second leaf spring is on the same straight line as the axis of the lever.

[0010] Furthermore, the positive stiffness spring is a horizontally arranged third leaf spring, a vertically arranged linear module is installed on the base, one end of the third leaf spring is fixed to the slider of the linear module, and the other end is fixed to the main mass member.

[0011] Furthermore, there are two third leaf springs, which are arranged at intervals up and down. The two third leaf springs are connected by a slider connector at one end close to the linear module, and are fixed on the main mass member at one end away from the linear module. The slider connector is fixed on the slider.

[0012] Furthermore, the positive stiffness spring is a vertically arranged coil spring, and there are at least two coil springs. One end of the coil spring is fixed under the main mass member, and the other end is fixed on the base.

[0013] Furthermore, the damping mechanism includes a particle damping container, which is fixedly connected to the end of the lever. The particle damping container is cubic or cylindrical, and is provided with a accommodating cavity filled with particle damping. The particle damping container is covered with a cover plate for closing the accommodating cavity.

[0014] Furthermore, the accommodating cavity is divided into a plurality of chambers by a partition, each chamber is filled with particle damping of different particle sizes, and the internal filling rate of the chamber is 60% to 80%.

[0015] Compared with the prior art, the present invention has the following beneficial effects: simple structure, easy operation, and simple maintenance. The introduction of a flexible hinge mechanism eliminates wear, friction, clearance, and lubrication requirements. The introduction of a lever enables the vibration isolation device to achieve inertial amplification of the inertial mass. At the same time, on this basis, the present invention introduces a particle damping container and adds particle damping to the container. The particle damping consumes the system vibration energy through collision and friction between the particle damping particles and between the damping particles and the inner wall of the particle damping container, thereby achieving the purpose of vibration reduction and further achieving the effect of vibration suppression. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the principle structure of the present invention; Figure 2 This is a schematic diagram of the three-dimensional structure of Example 1 of the present invention; Figure 3 This is a schematic cross-sectional view of the structure of Example 1 of the present invention; Figure 4 Schematic diagram of the structure of the flexible hinge mechanism of the present invention; Figure 5 This is a schematic cross-sectional structural diagram of Example 1 of the present invention.

[0017] In the figure: 1-main mass member; 2-lever; 3-particle damping container; 4-flexible hinge mechanism; 5-positive stiffness spring; 6-base; 7-particle damping; 8-linear module; 9-slider connector; 10-slider; 401-bottom connector; 402-first leaf spring; 403-Z-type connector; 404-main mass connector; 405-second leaf spring; 406-lever fixing block. DETAILED DESCRIPTION

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present application belongs.

[0020] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0021] Example 1, as Figure 1-4As shown, a mechanically enhanced particle damping vibration isolator comprises a base 6, to which a main mass member 1 is movably connected, the main mass member and the base are connected via a positive stiffness spring 5, a lever 2 is further connected between the main mass member and the base via a flexible hinge mechanism 4, and a damping mechanism is connected to the end of the lever; the flexible hinge mechanism comprises a main mass connector 404 and a bottom connector 401, a lever connector is connected between the main mass connector and the bottom connector via a leaf spring, one end of the lever is fixed to the lever connector, and the other end is connected to the damping mechanism, the bottom connector is fixed to the base, and the main mass connector is installed under the main mass member, that is, the lever connector is connected to the main mass connector and the bottom connector respectively via leaf springs, and when a force is applied to the system, the leaf springs will bend so that their center points act like hinges, greatly reducing wear, friction, clearance and lubrication requirements between the vibration isolation devices.

[0022] In this embodiment, the specific structure of the lever connector is as follows: the lever connector includes a Z-shaped connector 403 and a lever fixing block 406. One end of the Z-shaped connector is connected to the bottom connector via a vertically arranged first leaf spring 402, and the other end is connected to the lever fixing block. A vertically arranged second leaf spring 405 is clamped in the connection between the Z-shaped connector and the lever fixing block. The upper end of the second leaf spring is fixedly connected to the main mass connector, and one end of the lever is fixed to the lever fixing block. More specifically, the Z-shaped connector includes two parallel parts, one upper parallel part and the other lower parallel part. The parallel part is connected to the lever fixing block at one end through the connecting part to form a Z shape. The end of the parallel part located at the bottom is connected to the lever fixing block. The lower end of the second leaf spring is fixed between the end of the parallel part located at the bottom and the lever fixing block. The end of the parallel part located at the top is connected to the upper end of the first leaf spring. The lower end of the first leaf spring is fixed to the bottom connecting piece. At the same time, the line connecting the center point a of the first leaf spring and the center point b of the second leaf spring is on the same straight line as the axis of the lever. To ensure good consistency between the actual model and the theoretical model, when a force is applied to the system, these leaf springs will bend so that their center points act like hinges.

[0023] In this embodiment, for the sake of reasonable design, the main mass connecting member is T-shaped, with the horizontal part of the main mass connecting member at the top and the vertical part at the bottom. The horizontal part of the main mass connecting member can be installed under the main mass member by bolts, and the vertical part of the main mass connecting member is connected to the second leaf spring.

[0024] In this embodiment, the positive stiffness spring is a horizontally arranged third leaf spring, and a vertically arranged linear module 8 is installed on the base. The linear module is a prior art and can be an existing ball screw type linear module or a linear motor type linear module. Of course, it can also be other lifting mechanisms. One end of the third leaf spring is fixed to the slider 10 of the linear module, and the other end is fixed to the main mass part. The linear module is mainly used to adjust the height of the third leaf spring, and then adjust the height of the main mass part.

[0025] In this embodiment, there are two third leaf springs, which are arranged at intervals up and down. The two third leaf springs are connected by a slider connector 9 at one end close to the linear module, and are fixed on the main mass part at one end away from the linear module. The slider connector is fixed on the slider.

[0026] In this embodiment, in order to achieve vibration isolation, the damping mechanism includes a particle damping container 3, which is fixedly connected to the end of the lever, and the fixing method can be a threaded connection. The particle damping container is cubic or cylindrical, and of course it can also be other types of particle damping containers. A accommodating cavity is provided on the particle damping container, and the accommodating cavity is filled with particle damping 7. The particle damping container is covered with a cover for sealing the accommodating cavity. The particle damping container is detachable through the cover, which facilitates the replacement of the particle damping. The accommodating cavity is divided into several chambers by partitions, and each chamber is filled with particle damping of different particle sizes. The internal filling rate of the chamber is 60%~80%, and the particle damping can be metal particles, ceramic particles, viscoelastic material particles or other metal particles with a particle size of 1~5 mm.

[0027] Example 2, as Figure 5 Compared with Example 1, the difference of this embodiment is that the positive stiffness spring does not adopt the combination of the third leaf spring and the linear mold, but adopts a coil spring. Since the other structures are the same as those in Example 1, no further description is given. The following only describes the different technical structures. In this embodiment, the positive stiffness spring is a vertically arranged coil spring. There are at least two coil springs, one end of the coil spring is fixed under the main mass member, and the other end is fixed on the base. Of course, the positive stiffness spring can also be implemented by a semicircular corrugated periodic beam or other methods. No matter which method is used, it is only necessary to place them between the main mass and the base.

[0028] The present invention features a simple structure, easy operation, and simplified maintenance. The introduction of a flexible hinge mechanism eliminates wear, friction, clearance, and the need for lubrication. The use of a lever enables the vibration isolation device to amplify the inertial mass. Furthermore, the present invention incorporates a particle damping container, incorporating particle damping into the container. Collision and friction between the particles and between the particles and the inner wall of the particle damping container dissipate system vibration energy, thereby achieving vibration reduction and ultimately achieving vibration suppression.

[0029] Unless otherwise stated, for any of the technical solutions disclosed in the present invention, if a numerical range is disclosed, the disclosed numerical range is a preferred numerical range. Any person skilled in the art should understand that the preferred numerical range is merely a numerical range that is representative or has a more obvious technical effect among many feasible numerical values. Due to the large number of numerical values, it is impossible to enumerate them exhaustively. Therefore, the present invention discloses some numerical values ​​to illustrate the technical solutions of the present invention. Moreover, the numerical values ​​listed above should not be construed as limiting the scope of protection of the present invention.

[0030] If words such as "first" and "second" are used in this document to limit components, those skilled in the art should know that the use of "first" and "second" is only for the convenience of description to distinguish between components. Unless otherwise stated, the above words have no special meaning.

[0031] If the present invention discloses or involves components or structures that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connection using bolts or screws), and can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integrated structure (for example, manufactured by integral molding using a casting process) (except where it is obviously not possible to use an integrated molding process).

[0032] In addition, the orientations or positional relationships indicated by terms such as "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", and "outside" used in any of the technical solutions disclosed in the above invention are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing this patent, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this patent. Unless otherwise stated, the terms used to indicate shapes used in any of the technical solutions disclosed in the above invention include shapes that are approximate, similar, or close to them.

[0033] Any component provided by the present invention may be assembled from multiple separate components, or may be a separate component manufactured by an integral molding process.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention and not to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention. They should all be included in the scope of the technical solution for protection of the present invention.

Claims

1. A mechanically enhanced particle damping isolator, characterized in that: It includes a base, on which a main mass member is movably connected. The main mass member and the base are connected via a positive stiffness spring. A lever is also connected between the main mass member and the base via a flexible hinge mechanism, and a damping mechanism is connected to the end of the lever.

2. The mechanically enhanced particle damping isolator according to claim 1, characterized in that: The flexible hinge mechanism includes a main mass connecting member and a bottom connecting member. A lever connecting member is connected between the main mass connecting member and the bottom connecting member via a leaf spring. One end of the lever is fixed on the lever connecting member, and the other end is connected to the damping mechanism. The bottom connecting member is fixed on the base, and the main mass connecting member is installed under the main mass member.

3. The mechanically enhanced particle damping isolator according to claim 2, characterized in that: The lever connecting member includes a Z-shaped connecting member and a lever fixing block. One end of the Z-shaped connecting member is connected to the bottom connecting member via a vertically arranged first leaf spring, and the other end is connected to the lever fixing block. A vertically arranged second leaf spring is clamped in the connection between the Z-shaped connecting member and the lever fixing block. The upper end of the second leaf spring is fixedly connected to the main mass connecting member. One end of the lever is fixed to the lever fixing block.

4. The mechanically enhanced particle damping isolator according to claim 3, characterized in that: The main mass connecting member is T-shaped, with the horizontal part of the main mass connecting member at the top and the vertical part at the bottom. The horizontal part of the main mass connecting member is installed under the main mass member, and the vertical part of the main mass connecting member is connected to the second leaf spring.

5. The mechanically enhanced particle damping isolator according to claim 3, characterized in that: The connecting line of the centers of the first leaf spring and the second leaf spring is on the same straight line as the axis of the lever.

6. The mechanically enhanced particle damping isolator according to any one of claims 1 to 5, characterized in that: The positive stiffness spring is a horizontally arranged third leaf spring, a vertically arranged linear module is installed on the base, one end of the third leaf spring is fixed to the slider of the linear module, and the other end is fixed to the main mass member.

7. The mechanically enhanced particle damping isolator according to claim 6, characterized in that: There are two third leaf springs, which are spaced apart in an upper and lower manner. The two third leaf springs are connected by a slider connector at one end close to the linear module, and are fixed on the main mass member at one end away from the linear module. The slider connector is fixed on the slider.

8. The mechanically enhanced particle damping isolator according to any one of claims 1 to 5, characterized in that: The positive stiffness spring is a vertically arranged coil spring, and there are at least two coil springs. One end of the coil spring is fixed under the main mass member, and the other end is fixed on the base.

9. The mechanically enhanced particle damping isolator according to claims 1-5, characterized in that: The damping mechanism includes a particle damping container, which is fixedly connected to the end of the lever. The particle damping container is cubic or cylindrical. A accommodating cavity is provided on the particle damping container, and the accommodating cavity is filled with particle damping. The particle damping container is covered with a cover plate for closing the accommodating cavity.

10. The mechanically enhanced particle damping isolator according to claim 8, characterized in that: The accommodating cavity is divided into a plurality of chambers by a partition, each chamber is filled with particle damping of different particle sizes, and the internal filling rate of the chamber is 60% to 80%.

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