Aerodynamic quasi-zero stiffness vibration isolator based on flat-folded paper structure

Abstract

The application discloses a kind of aerodynamic quasi-zero stiffness vibration isolator based on flat fold paper structure, to provide a kind of simple structure, versatile and adjustable vibration isolation device.The vibration isolator is switched between flat mode, quasi-zero stiffness vibration isolation mode and high stiffness support mode by air pressure adjustment, can effectively isolate low-frequency vibration and meet the demand of high load support.The paper structure design is light and easy to fold, convenient for transportation and storage, while using lightweight high-strength materials, ensuring good stability and durability.Compared with traditional vibration isolator, the application has significant adjustability, versatility and cost-effectiveness, suitable for aerospace, precision instruments, transportation and other fields, providing an innovative solution for vibration control.

Description

Technical Field

[0001] The present invention relates to the technical field of vibration control and vibration isolation, and in particular to a pneumatic quasi-zero stiffness vibration isolator based on a flat origami structure. Background Art

[0002] In modern industry and technology, vibration control technology is crucial for ensuring equipment accuracy, extending service life, and improving system stability. From precision instruments to aerospace, transportation, and construction, vibration isolation technology is used throughout the industry. However, despite these widespread applications, vibration isolation technology still faces numerous challenges in controlling low-frequency vibrations and supporting high loads, particularly when lightweight, adjustability, and versatility are crucial.

[0003] Traditional vibration isolation methods mainly rely on linear vibration isolators, whose core components are mechanical springs. According to vibration theory, traditional linear vibration isolation methods are only effective when the excitation frequency is greater than the natural frequency of the vibration isolation system. This limits their vibration isolation capabilities in the low-frequency range. Furthermore, the stiffness of traditional vibration isolators is typically fixed, making them difficult to adjust based on actual needs and unable to adapt to different operating conditions. In recent years, quasi-zero-stiffness vibration isolation technology has gradually become a research hotspot, but existing technologies still suffer from complex structures, limited adjustment ranges, and inconvenient portability. In particular, in applications requiring both vibration isolation and high-stiffness support, existing technologies struggle to provide effective solutions.

[0004] Given this, it is urgent to develop a new vibration isolation method or device. This device needs to overcome the shortcomings of traditional vibration isolators, such as structural complexity, limited adjustment range, and inconvenience in portability, while also being lightweight, adjustable, and multifunctional to meet diverse working environments and load requirements. Summary of the Invention

[0005] The purpose of the present invention is to provide a pneumatic quasi-zero stiffness vibration isolator based on a flat origami structure to overcome the shortcomings of traditional vibration isolators such as complex structure, limited adjustment range and inconvenience in carrying.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A pneumatic quasi-zero stiffness vibration isolator based on a flat origami structure, comprising a load-bearing platform and a base, wherein the load-bearing platform is connected to the base via a plurality of side panels, and the side panels are connected via folding panels;

[0008] The pneumatic quasi-zero stiffness vibration isolator further includes an air pipe, which is connected to any one of the side plates.

[0009] The bearing platform is a quadrilateral structure, and each side of the bearing platform is connected to a side plate.

[0010] The base is a quadrilateral structure, and each side of the base is connected to a side panel.

[0011] The side panels are of trapezoidal structure, the longer bottom sides of the side panels are connected to the longer bottom sides of other side panels, and the shorter bottom sides of the side panels are connected to the bearing platform or the base.

[0012] The folding plate is a triangular structure, one side of the folding plate is connected to the side plate, and the other two sides are respectively connected to other folding plates.

[0013] Flexible connections are used between the bearing platform, side panels, folding panels and base.

[0014] It includes flat mode, quasi-zero stiffness vibration isolation mode and high stiffness support mode, and mode switching is achieved by adjusting the internal air pressure through the air pipe.

[0015] When the air pressure is zero, the isolator is in a flat mode. At this time, the overall height of the isolator is the smallest and the stiffness approaches zero.

[0016] When the air pressure increases until the dynamic stiffness of the isolator approaches zero, the isolator enters the quasi-zero stiffness isolation mode.

[0017] When the air pressure increases until the height of the isolator reaches its maximum value, the isolator is in high-rigidity support mode.

[0018] Compared with the prior art, the present invention has the following beneficial technical effects:

[0019] The present invention cleverly achieves an organic combination of structural simplification and versatility through an innovative pneumatic flat origami structure design. The vibration isolator adopts air pressure regulation technology, which can flexibly switch between multiple working modes. It has a simple structure and diverse functions. Compared with traditional vibration isolators, the present invention greatly reduces the structural complexity. At the same time, it has a flat mode, a quasi-zero stiffness vibration isolation mode and a high-stiffness support mode, which can meet the diverse needs of different working scenarios. The stiffness of the vibration isolator can be dynamically changed through air pressure regulation, so that it can adapt to different loads and vibration environments, thereby overcoming the limitations of traditional vibration isolators that have fixed stiffness and are difficult to adjust.

[0020] In terms of design, the origami structure is lightweight and easy to fold flat, which makes the vibration isolator significantly easier to transport and store. The multi-function switching achieved by controlling the air pressure further enhances the adaptability of the vibration isolator, enabling it to flexibly cope with various complex working scenarios. In the quasi-zero stiffness vibration isolation mode, the vibration isolator exhibits efficient low-frequency vibration isolation capabilities, effectively breaking through the limitations of traditional linear vibration isolators in terms of insufficient vibration isolation capabilities in the low-frequency band. In the high-stiffness support mode, the vibration isolator can meet high load requirements and maintain good stability and support performance. It is particularly suitable for emerging technology fields such as aerospace, high-end electronic equipment manufacturing, and other fields with extremely high vibration control requirements, providing effective vibration control solutions for these fields.

[0021] Furthermore, the vibration isolator is constructed of lightweight, high-strength materials and features a foldable design, further enhancing its portability and practicality. The simplified overall structure not only reduces the complexity of the manufacturing process but also significantly reduces production costs. Compared to some complex vibration isolation technologies, the manufacturing process of this invention is relatively simple, and the required raw materials and processing equipment are relatively common, making large-scale production possible and possessing great potential for widespread application.

[0022] In summary, the present invention demonstrates significant technical advantages in terms of structural simplicity, versatility, adjustability, low-frequency vibration control capabilities, high load-bearing capacity, lightness and portability, and cost-effectiveness. It not only provides an efficient, practical, and economical innovative solution for vibration control and isolation technology, but is also expected to be widely used in multiple industries, thereby promoting technological progress and development in related fields. Whether in traditional industrial fields such as transportation and construction engineering, or emerging scientific and technological fields such as aerospace and high-end electronic equipment manufacturing, the present invention can provide reliable vibration control support, ensuring stable operation and improved precision of equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the structure of a pneumatic quasi-zero stiffness vibration isolator based on a flat origami structure in an embodiment of the present invention.

[0024] Figure 2 Schematic diagram of the working state of a pneumatic quasi-zero stiffness vibration isolator based on a flat origami structure in a flat mode according to an embodiment of the present invention.

[0025] Figure 3 Schematic diagram of the working state of a pneumatic quasi-zero stiffness vibration isolator based on a flat origami structure in a quasi-zero stiffness vibration isolation mode in an embodiment of the present invention.

[0026] Figure 4A schematic diagram of the working state of a pneumatic quasi-zero stiffness vibration isolator based on a flat-folded paper structure in a high-stiffness support mode in an embodiment of the present application.

[0027] Figure 5 A force and height relationship curve trend chart of a pneumatic quasi-zero stiffness vibration isolator based on a flat-folded paper structure in a quasi-zero stiffness vibration isolation mode in an embodiment of the present application.

[0028] In the figure, 1 is a bearing platform; 2 is a side plate; 3 is a folded plate; 4 is a base; 5 is a gas pipe. DETAILED DESCRIPTION

[0029] In modern industry and technology, vibration control technology is a key link to ensure equipment operation precision, prolong service life, and improve system stability. From precision instruments to aerospace, from transportation to construction engineering, vibration isolation technology is applied throughout. However, in the context of these wide applications, vibration isolation technology still faces many challenges in low-frequency vibration control and high-load support, especially in situations where portability, adjustability, and multifunctionality are required.

[0030] Traditional vibration isolation methods mainly rely on linear vibration isolators, whose core component is a mechanical spring. According to vibration theory, traditional linear vibration isolation methods are only effective when the excitation frequency is greater than the natural frequency of the vibration isolation system times, which limits its vibration isolation ability in the low-frequency band. In addition, the stiffness of traditional vibration isolators is usually fixed and cannot be adjusted according to actual needs, making it difficult to adapt to different working conditions. In recent years, quasi-zero stiffness vibration isolation technology has gradually become a research hotspot, but existing technologies still have problems such as complex structure, limited adjustment range, and inconvenience to carry. Especially in application scenarios that require both vibration isolation and high-stiffness support, existing technologies are difficult to provide effective solutions.

[0031] Therefore, it is particularly urgent to develop a new type of vibration isolation means or device. Such a device needs to overcome the shortcomings of traditional vibration isolators in terms of structural complexity, limited adjustment range, and inconvenience to carry, while also having the characteristics of portability, adjustability, and multifunctionality to meet the diverse needs of working environments and loads. The present application proposes a pneumatic quasi-zero stiffness vibration isolator based on a flat-folded paper structure, which realizes the switching of multiple working modes through pneumatic adjustment, not only simplifying the structure of the vibration isolator, but also significantly improving its vibration isolation effect and adaptability, providing an innovative solution for the field of vibration control.

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0034] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "mounted / connected," and "connected" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "several" means two or more, unless otherwise specifically defined.

[0036] Reference Figure 1 The figure shows a schematic diagram of the structure of a pneumatic quasi-zero-stiffness vibration isolator based on a flat origami structure in a specific embodiment of the present application. The structure primarily includes an origami-structured sealed cavity and an air tube that provide adjustable stiffness in the vertical direction. The origami-structured sealed cavity includes a supporting platform 1 and a base 4. The supporting platform 1 is connected to the base 4 via several side panels 2, and the side panels 2 are connected via folded panels 3.

[0037] The pneumatic quasi-zero-stiffness isolator also includes an air pipe 5, connected to either side panel 2, to transport gas. By controlling the input and output of gas, the air pressure within the origami-structured sealed cavity is precisely adjusted, thereby driving the isolator to switch between different operating modes. The gas within the sealed cavity supports the support platform 1, and by adjusting the air pressure, it provides an internal driving force, thereby changing the isolator's shape and achieving adjustable sealed cavity stiffness.

[0038] The supporting platform 1 is a quadrilateral structure located at the top of the structure, directly contacting the equipment or object to be isolated. It is responsible for evenly transferring external loads to the entire sealed cavity. The base is also quadrilateral, providing stable support for the entire isolator. Each side of the supporting platform 1 is connected to a side panel 2.

[0039] The base 4 is a quadrilateral structure, and each side of the base 4 is connected to a side panel 2 .

[0040] There are eight side panels 2, all of which are trapezoidal in structure. They provide lateral support for the entire sealed cavity and coordinate with the folding panels 3 to adjust the structural stiffness distribution when the gas pressure changes. The longer bottom edge of each side panel 2 is connected to the longer bottom edges of other side panels 2, while the shorter bottom edge of each side panel 2 is connected to the load-bearing platform 1 or base 4. Each side panel 2 is tightly connected to the load-bearing platform 1, base 4, and adjacent folding panels 3, forming a stable frame structure that ensures the vibration isolator maintains good morphological stability in different operating modes.

[0041] The folded plates 3, comprising 16 triangular panels, are key components for adjusting the isolator's stiffness. As the air pressure changes, the angles and relative positions of the panels change, causing the vertical stiffness of the entire sealed cavity to vary. This interaction, combined with the positive stiffness provided by the gas, allows for flexible adjustment of the isolator's stiffness. One side of the folded plates 3 is connected to the side panel 2, while the remaining two sides are connected to other folded plates 3.

[0042] The components of the sealed cavity are connected in a manner that is airtight and flexible. The supporting platform 1, side panels 2, folding plates 3, and base 4 are connected in a flexible manner, which can be a flexible sealant connection or a rubber link connection, to ensure the folding performance and airtightness of the vibration isolator. Among them, the supporting platform 1, side panels 2, folding plates 3, and base 4 are made of high-strength and high-elastic materials, which can be spring steel, polyester elastic materials, or silicone rubber, etc., to ensure that the vibration isolator can perform stably under various working conditions. The air pipe 5 and the sealed cavity are connected in a manner that is airtight, which can be a crimping, threaded connection, or a clamp connection, etc., to meet the strict requirements for the airtightness of the vibration isolator in different scenarios.

[0043] The application provides a kind of aerodynamic quasi-zero stiffness vibration isolator based on flat foldable paper structure, with unique adjustable stiffness characteristics, can flexibly switch mode according to different working environment and demand.The vibration isolator designs three main modes: flat mode, quasi-zero stiffness vibration isolation mode and high stiffness support mode.Through adjusting internal air pressure by air pipe 5, the vibration isolator can realize seamless switching between these modes, so as to adapt to low-frequency vibration isolation, high-load working conditions and other application scenarios.In addition, the foldable design of the vibration isolator greatly facilitates its transportation and storage, especially suitable for occasions that need to frequently change working environment, such as field operation, mobile equipment, etc.Compared with the prior art, the present application not only has simple structure, strong adaptability, good vibration isolation effect, but also low manufacturing cost, and has the potential for large-scale popularization and application.

[0044] Specifically, referring to Figure 2 When the air pressure is zero, the vibration isolator is in flat mode, at this time the overall height of the vibration isolator is minimum, and the stiffness tends to zero.In this mode, the folded plate and side plate of the vibration isolator are in fully expanded state, the structure is compact, convenient for transportation and storage.With the gradual increase of air pressure, the vibration isolator enters quasi-zero stiffness vibration isolation mode, as shown in Figure 3 At this time, the dynamic stiffness of the vibration isolator tends to zero, which can effectively isolate low-frequency vibration, while providing high static load capacity.This mode is particularly suitable for application scenarios with high vibration control requirements, such as precision instruments, aerospace, etc.When the air pressure further increases, the height of the vibration isolator reaches the maximum, and enters high stiffness support mode, as shown in Figure 4 At this time, the vibration isolator can withstand larger external load, suitable for working conditions requiring high stiffness support, such as transportation, construction, etc.

[0045] In actual use, the adjustable stiffness characteristics of the present application are particularly prominent.Through accurate adjustment of gas pressure, the vibration isolator can realize configuration transformation of the structure, accompanied by change of axial stiffness, so as to flexibly switch between different modes.When the gas pressure is zero, the structure height H=0, and the vibration isolator is in fully expanded flat mode, as shown in Figure 2 With the gradual increase of air pressure, when the structure height H=H1, as shown in Figure 3 The vibration isolator enters quasi-zero stiffness vibration isolation mode.At this time, the curve of structure axial force F with structure overall height H is as shown in Figure 5 The sealed cavity of the paper structure produces negative stiffness in the vertical direction, while the gas provides positive stiffness in the vertical direction, which interact to ensure that the vibration isolator is in the ideal state of dynamic stiffness close to zero under static load condition.This high static stiffness and low dynamic stiffness mechanical property enables it to effectively isolate low-frequency vibration.When the air pressure continues to increase, the structure height H=H2, as shown in Figure 4As shown in Figure 2, the isolator enters a high-stiffness support mode and can withstand large external loads. The specific values ​​of H1 and H2 are closely related to the material and initial configuration of the cavity.

[0046] During actual operation, operators can precisely adjust the gas pressure and flexibly switch the isolator's operating mode based on the actual needs of the specific working conditions. This flexibility allows the isolator to adapt to a variety of usage scenarios. Whether it is precision instruments requiring low-frequency vibration isolation or heavy equipment requiring high-rigidity support, optimal vibration isolation can be achieved through simple air pressure adjustment. In addition, the isolator's lightweight and foldable design further enhances its convenience in practical applications, making it an efficient, practical, and economical innovative solution in the field of vibration control.

[0047] The operating principle of this invention is based on a dynamic regulation mechanism of the origami structure's stiffness using gas pressure. In its initial state, when the gas pressure is zero, the origami structure is in a fully expanded, flat position. At this point, the isolator's overall height is minimal, and its stiffness approaches zero. This state is particularly suitable for transporting and storing the isolator, as its compact structure occupies minimal space, facilitating rapid deployment in different scenarios.

[0048] As the gas pressure gradually increases, the mechanical properties within the origami structure begin to change. In the vertical direction, the origami structure exhibits negative stiffness, while the gas provides positive stiffness in the vertical direction. This interaction of positive and negative stiffness, according to the principle of stiffness cancellation, makes the origami structure as a whole exhibit near-zero stiffness. At this point, the isolator enters a quasi-zero stiffness isolation mode, which can effectively isolate low-frequency vibrations while providing a high static load-bearing capacity. This mode is particularly suitable for applications with extremely high vibration control requirements, such as precision instruments, aerospace, and other fields, and can significantly improve the operating accuracy and stability of the equipment.

[0049] As the air pressure continues to rise, the origami structure further deforms, eventually entering a high-stiffness support mode. At this point, the isolator reaches its maximum height, significantly increasing its overall stiffness and enabling it to withstand significant external loads. This mode is ideal for applications requiring high-stiffness support, such as transportation and construction, ensuring the stability and safety of equipment under high loads.

[0050] By precisely controlling the gas pressure, the origami structure can smoothly transition between different stiffness modes. This flexible, adjustable stiffness allows the isolator to effectively address vibration control requirements under diverse operating conditions, demonstrating exceptional adaptability and versatility. Users can easily switch the isolator's operating mode by adjusting the gas pressure, achieving a seamless transition from low-frequency isolation to high-stiffness support, depending on the specific application scenario.

[0051] The above content shows and describes the basic principles, main features and significant advantages of the present invention. Those skilled in the art should understand that the contents described in the embodiments and specifications of the present invention are only preferred embodiments of the present invention and are not limitations of the present invention. Without departing from the spirit and scope of the present invention, the present invention may also have various changes and improvements. These changes and improvements, whether they are optimization of the structure, selection of materials, or expansion of the working mode, should fall within the scope of protection of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents, and any further innovations and improvements based on the present invention, as long as they comply with the scope of the claims, are deemed to be part of the present invention.

Claims

1. A pneumatic quasi-zero stiffness vibration isolator based on a flat origami structure, characterized in that: The invention comprises a carrying platform (1) and a base (4), wherein the carrying platform (1) is connected to the base (4) via a plurality of side panels (2), each side of the carrying platform (1) and the base (4) is connected to a side panel (2), and the side panels (2) are connected via folding panels (3); The side panel (2) is a trapezoidal structure, the longer bottom side of the side panel (2) is connected to the longer bottom side of the other side panels (2), and the shorter bottom side of the side panel (2) is connected to the bearing platform (1) or the base (4); The folding plate (3) is a triangular structure, one side of the folding plate (3) is connected to the side plate (2), and the other two sides are respectively connected to other folding plates (3); The carrying platform (1), the side panels (2), the folding panels (3) and the base (4) are flexibly connected; The pneumatic quasi-zero stiffness vibration isolator further includes an air pipe (5), and the air pipe (5) is connected to any one of the side plates (2).

2. The pneumatic quasi-zero stiffness vibration isolator based on a flat origami structure according to claim 1, characterized in that: The carrying platform (1) is a quadrilateral structure.

3. The pneumatic quasi-zero stiffness vibration isolator based on a flat origami structure according to claim 1, characterized in that: The base (4) is a quadrilateral structure.

4. The pneumatic quasi-zero stiffness vibration isolator based on a flat origami structure according to claim 1, characterized in that: It includes a flattening mode, a quasi-zero stiffness vibration isolation mode and a high stiffness support mode, and mode switching is achieved by adjusting the internal air pressure through the air pipe (5).

5. The pneumatic quasi-zero stiffness vibration isolator based on a flat origami structure according to claim 4, characterized in that: When the air pressure is zero, the vibration isolator is in a flat mode. At this time, the overall height of the vibration isolator is the smallest and the stiffness approaches zero.

6. The pneumatic quasi-zero stiffness vibration isolator based on a flat origami structure according to claim 4, characterized in that: When the air pressure increases until the dynamic stiffness of the vibration isolator approaches zero, the vibration isolator is in a quasi-zero stiffness vibration isolation mode.

7. The pneumatic quasi-zero stiffness vibration isolator based on a flat origami structure according to claim 4, characterized in that: When the air pressure increases until the height of the vibration isolator reaches a maximum value, the vibration isolator is in a high-rigidity support mode.

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