A multi-stable buffer absorbing ability physics metamaterial

Abstract

The application discloses a kind of multi-stable buffering absorbing ability mechanics metamaterial, it is related to mechanics metamaterial technical field, including at least one disc assembly, at least one connecting piece and at least two connecting rods, two described connecting rods are embedded and are connected, one end of the connecting rod is set as embedded end, another end of the connecting rod is provided with connecting groove;The one end of the connecting piece is connected with the connecting rod, and the other end of the connecting piece is connected with the disc assembly.The multi-stable buffering absorbing ability mechanics metamaterial with the above structure has highly adjustable damping performance, and can achieve good damping performance for the vibration isolation requirements of highly precise instruments and equipment;Multiple rows of magnetic suction blocks are arranged in the overall structure, which can dissipate and capture impact energy from impact, and convert the input mechanical energy generated by impact into mainly magnetic potential energy and lock it in the magnetic suction block.

Description

Technical Field

[0001] This invention relates to the field of mechanical metamaterials technology, and in particular to a multistable, buffer-absorbing mechanical metamaterial. Background Technology

[0002] Precision instruments and equipment generally require vibration isolation and energy absorption devices such as shims for vibration protection during transportation and operation. Traditional vibration isolation shims and other devices have relatively simple structures, weak damping adjustment performance, and lack of self-adaptive ability, making it difficult to meet the vibration isolation requirements of precision instruments.

[0003] Mechanical metamaterials are complex artificial materials composed of periodically arranged microstructures. By adjusting the geometric parameters of these microstructures, their macroscopic mechanical properties can be regulated, offering potential applications in aerospace, vibration damping, and energy absorption. Mechanical metamaterials provide opportunities for designing novel vibration isolation and energy absorption devices. However, the vibration isolation characteristics of existing mechanical metamaterials stem from the geometric parameters of their microstructures. The bistable mechanism refers to a structure possessing two steady-state structural forms, which, when the force exceeds a design threshold, undergo morphological changes during structural deformation, resulting in an energy-locked state. Under a downward vertical load, the overall force value of this structure first increases and then decreases until it becomes negative, causing a sudden jump from one steady state to another. Upon unloading, without applying external force, the structure cannot return to its initial state, thus storing some deformation energy within the structure. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-steady-state buffer absorption mechanical metamaterial to solve the problems of traditional vibration isolation pads and other devices having relatively simple structural forms, weak damping adjustment performance, lack of self-adaptive ability, and difficulty in meeting the vibration isolation requirements of precision instruments.

[0005] To achieve the above objectives, the present invention provides a multi-stable buffer absorption mechanical metamaterial, comprising at least one disk assembly, at least one connector and at least two connecting rods, wherein the two connecting rods are fitted together, one end of the connecting rod is configured as a fitting end, and the other end of the connecting rod is provided with a connecting groove;

[0006] One end of the connector is connected to the connecting rod, and the other end of the connector is connected to the disk assembly.

[0007] Preferably, the disk assembly includes a first disk and a second disk. Both the second disk and the first disk have a snap-fit ​​groove. A frustum is provided at the center of the snap-fit ​​groove. A protrusion is provided at the center of the frustum of the first disk. A groove is provided at the center of the frustum of the second disk. The groove and the protrusion are adapted to each other.

[0008] Preferably, one end of the connector is provided with an arc-shaped plate, which is engaged in the engaging circular groove, and the other end of the connector is provided with a connecting plate, which is engaged in the connecting groove.

[0009] Preferably, a row of mounting holes is provided at both the upper and lower ends of the connecting rod, and a magnetic block is fixedly installed in each mounting hole. The magnetic blocks are arranged in two rows, with the magnetic poles on the outward side of the upper and lower rows of magnetic blocks being the same.

[0010] Preferably, the connecting rod has a sliding groove at one end near the connecting groove, and a limit block is provided on the mating end.

[0011] Therefore, the multistable buffer absorption metamaterial of the present invention, employing the above-described structure, has the following beneficial effects:

[0012] (1) The present invention has highly adjustable damping performance, and can achieve good damping performance for the vibration isolation requirements of highly precise instruments and equipment.

[0013] (2) The present invention sets up multiple rows of magnetic blocks in the overall structure, which can dissipate and capture impact energy from impact, and convert the input mechanical energy generated by impact into magnetic potential energy and lock it in the magnetic blocks.

[0014] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an embodiment of a multi-stable buffer absorption metamaterial of the present invention;

[0016] Figure 2 This is a schematic diagram of the structure of the first disk of a multi-stable buffer absorption metamaterial according to the present invention;

[0017] Figure 3 This is a schematic diagram of the structure of the second disk of a multi-stable buffer absorption metamaterial according to the present invention;

[0018] Figure 4 This is a schematic diagram of the structure of a connector of a multi-stable buffer absorption mechanical metamaterial according to the present invention;

[0019] Figure 5 This is a schematic diagram of the linkage structure of a multi-stable buffer absorption metamaterial according to the present invention. Figure 1 ;

[0020] Figure 6 This is a schematic diagram of the linkage structure of a multi-stable buffer absorption metamaterial according to the present invention. Figure 2 ;

[0021] Figure 7This is a schematic diagram of the structure of a first embodiment of the multi-stable buffer absorption metamaterial of the present invention;

[0022] Figure 8 This is a schematic diagram of the structure of a second embodiment of the multi-stable buffer absorption mechanical metamaterial of the present invention;

[0023] Reference numerals: 1. Disc assembly; 2. Connector; 3. Linkage rod; 4. Connecting groove; 5. First disc; 6. Second disc; 7. Snap-fit ​​groove; 8. Frustum; 9. Protrusion; 10. Groove; 11. Arc plate; 12. Connecting plate; 13. Magnetic block; 14. Sliding groove; 15. Limiting block. Detailed Implementation

[0024] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0026] Example

[0027] Please see Figure 1-8 This invention provides a multi-stable buffer-absorbing metamaterial, comprising at least one disk assembly 1, at least one connector 2, and at least two connecting rods 3, which are combined to form an arbitrary unit cell basic rod of a lattice. Each connecting rod 3 has a row of mounting holes at its upper and lower ends, with a diameter of 1.5 mm and a depth of 1.5 mm, and a distance of 7.5 mm between adjacent mounting holes. Magnetic blocks 13 are glued into each mounting hole, with the size of the mounting hole and the magnetic block 13 matching to ensure the magnetic block 13 is securely held in place and not easily detached. The magnetic blocks 13 are arranged in two rows, with the upper and lower rows having the same magnetic poles on their outward-facing sides. This arrangement prevents the two connecting rods 3 from adhering together, thus avoiding interference with use.

[0028] Two connecting rods 3 are interlocked and can slide relative to each other. One end of each connecting rod 3 is designated as the interlocking end, and the other end of each connecting rod 3 has a connecting groove 4. A sliding groove 14 is provided at the end of each connecting rod 3 near the connecting groove 4. A limit block 15 is provided on the interlocking end. The limit block 15 prevents the two connecting rods 3 from disengaging during relative sliding, thus affecting their use.

[0029] One end of connector 2 is connected to connecting rod 3, and the other end of connector 2 is connected to disk assembly 1. Disk assembly 1 includes a first disk 5 and a second disk 6. Both the second disk 6 and the first disk 5 have engaging grooves 7. A frustum 8 is located at the center of the engaging groove 7. A protrusion 9 is located at the center of the frustum 8 of the first disk 5, and a groove 10 is located at the center of the frustum 8 of the second disk 6. The groove 10 and the protrusion 9 are fitted together. The protrusion 9 is inserted into the groove 10 to connect the first disk 5 and the second disk 6 together.

[0030] One end of the connector 2 is provided with an arc-shaped plate 11, which is engaged in the engagement groove 7 and can slide freely within the engagement groove 7. The other end of the connector 2 is provided with a connecting plate 12, which is fitted into the connecting groove 4.

[0031] Example 1

[0032] Please see Figure 7 A multistable, buffer-absorbing metamaterial with a rhomboid structure is constructed using four first disks 5 and second disks 6, ten connecting rods 3, and ten connecting parts 2. During the design process, a combination of finite element analysis and theoretical analysis is employed. Through simple calculations and selection of structural geometric parameters, the performance of the multistable metamaterial structure can be controlled, enabling it to achieve the desired target performance and meet the practical needs of advanced, multifunctional, and multi-purpose equipment. Figure 1 He Ru Figure 7 As shown, the magnetic block 13 has two steady-state conversion functions, representing the conversion of energy potential energy.

[0033] Example 2

[0034] Please see Figure 8 Please see Figure 7 A pentagonal multistable buffer-absorbing metamaterial is constructed using five first disks (5) and second disks (6), ten connecting rods (3), and ten connecting parts (2). During the design process, a combination of finite element analysis and theoretical analysis, along with simple calculations and selection of structural geometric parameters, allows for performance control of the multistable metamaterial structure. This enables the multistable mechanical metamaterial structure to achieve the desired target performance, meeting the practical needs of advanced, multifunctional, and multi-purpose equipment. Figure 1 He Ru Figure 8As shown, the magnetic block 13 has two steady-state conversion functions, representing the conversion of energy potential energy.

[0035] As can be seen from Examples 1 and 2, the multistable buffer absorption metamaterial of the present invention can be reused. Based on at least one disk assembly 1, at least one connector 2 and at least two connecting rods 3, it can also realize reconfigurable design and carry out more structural designs.

[0036] Therefore, the present invention employs a multi-stable buffer absorption mechanical metamaterial with the above-mentioned structure, which has highly adjustable damping performance and can achieve good damping performance for the vibration isolation requirements of highly precise instruments and equipment; by setting multiple rows of magnetic blocks in the overall structure, impact energy can be dissipated and captured from the impact, and the input mechanical energy generated by the impact is mainly converted into magnetic potential energy and locked in the magnetic blocks.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A multi-stable buffer absorption metamaterial, characterized in that: It includes at least one disk assembly, at least one connector and at least two connecting rods, the two connecting rods being fitted together, one end of each connecting rod being a fitted end and the other end of each connecting rod having a connecting groove; One end of the connector is connected to the connecting rod, and the other end of the connector is connected to the disk assembly; The disk assembly includes a first disk and a second disk. Both the second disk and the first disk are provided with a snap-fit ​​groove. A frustum is provided at the center of the snap-fit ​​groove. A protrusion is provided at the center of the frustum of the first disk. A groove is provided at the center of the frustum of the second disk. The groove and the protrusion are adapted to each other. One end of the connector is provided with an arc-shaped plate, which is engaged in the engagement groove; the other end of the connector is provided with a connecting plate, which is engaged in the connecting groove. The upper and lower ends of the connecting rod are provided with a row of mounting holes, and a magnetic block is fixedly installed in each mounting hole. The magnetic blocks are arranged in two rows, and the magnetic poles on the outward side of the upper row of magnetic blocks and the lower row of magnetic blocks are the same. The connecting rod has a sliding groove at one end near the connecting groove, and a limit block is provided on the fitting end.

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