Pneumatic quasi-zero stiffness vibration isolator based on flat paper folding structure

Abstract

The invention discloses a pneumatic quasi-zero stiffness vibration isolator based on a flat paper folding structure, and aims to provide a vibration isolation device which is simple in structure, diversified in function and adjustable. According to the vibration isolator, switching among a tiling mode, a quasi-zero-stiffness vibration isolation mode and a high-stiffness supporting mode is achieved through air pressure adjustment, low-frequency vibration can be effectively isolated, and the high-load supporting requirement can be met. The paper folding structure is light in design, easy to fold and convenient to transport and store, meanwhile, light high-strength materials are adopted, and good stability and durability are guaranteed. Compared with a traditional vibration isolator, the adjustable vibration isolator has remarkable adjustability, multifunctionality and cost effectiveness, is suitable for multiple fields of aerospace, precise instruments, transportation and the like, and provides an innovative solution for vibration control.

Description

Technical Field

[0001] The invention relates to the technical field of vibration control and seismic 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 a key link to ensure the accuracy of equipment operation, extend service life, and improve system stability. From precision instruments to aerospace, from transportation to construction engineering, the application of vibration isolation technology runs through. However, in the context of these widespread applications, vibration isolation technology still faces many challenges in low-frequency vibration control and high-load support, especially in situations where lightness, adjustability, and versatility are required.

[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. times, which limits its vibration isolation ability in the low frequency band. In addition, the stiffness of traditional vibration isolators is usually fixed, which is difficult to adjust according to actual needs and cannot adapt to different working conditions. In recent years, quasi-zero stiffness vibration isolation technology has gradually become a research hotspot, but the existing technology still has problems such as cumbersome structure, limited adjustment range, and inconvenient portability. Especially in application scenarios that require both vibration isolation and high-rigidity support, it is difficult for existing technologies to provide effective solutions.

[0004] In view of this, it is particularly urgent to develop a new vibration isolation method or device. This device needs to overcome the shortcomings of traditional vibration isolators in terms of structural complexity, limited adjustment range, and inconvenience in carrying, and at the same time be lightweight, adjustable, and multifunctional to meet diverse working environments and load requirements. Summary of the invention

[0005] The object of the present invention is to provide a pneumatic quasi-zero stiffness vibration isolator based on a flat origami structure, so as to overcome the shortcomings of the traditional vibration isolator, 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 solution: A pneumatic quasi-zero stiffness vibration isolator based on a flat origami structure, comprising a bearing platform and a base, wherein the bearing platform is connected to the base through a plurality of side plates, and the side plates are connected through folding plates; The pneumatic quasi-zero stiffness vibration isolator also includes an air pipe, which is connected to any side plate.

[0007] The bearing platform is a quadrilateral structure, and each side of the bearing platform is respectively connected with a side plate.

[0008] The base is a quadrilateral structure, and each side of the base is respectively connected with a side panel.

[0009] The side panels are of a 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.

[0010] 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.

[0011] Flexible connections are adopted between the bearing platform, the side panels, the folding panels and the base.

[0012] It includes flat laying mode, quasi-zero stiffness vibration isolation mode and high stiffness support mode. The mode switching is achieved by adjusting the internal air pressure through the air pipe.

[0013] 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.

[0014] When the air pressure increases until the dynamic stiffness of the isolator approaches zero, the isolator is in a quasi-zero stiffness vibration isolation mode.

[0015] When the air pressure increases until the height of the isolator reaches its maximum value, the isolator is in high-stiffness support mode.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects: 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 and 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, and at the same time 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 work 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.

[0017] In terms of design, the origami structure is lightweight and easy to fold flat, which makes the vibration isolator significantly convenient in transportation and storage. 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 capability, effectively breaking through the limitation of insufficient vibration isolation capability of traditional linear vibration isolators 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 scientific and technological fields such as aerospace, high-end electronic equipment manufacturing, etc. that have extremely high requirements for vibration control, and provides effective vibration control solutions for these fields.

[0018] In addition, the vibration isolator is made of lightweight and high-strength materials, combined with a foldable design, which further improves its portability and practicality. The simplification of the overall structure not only reduces the complexity of the manufacturing process, but also significantly reduces the production cost. Compared with some complex vibration isolation technologies, the manufacturing process of the present invention is relatively simple, and the required raw materials and processing equipment are also relatively common, which makes large-scale production possible and has great potential for large-scale promotion and application.

[0019] In summary, the present invention has shown significant technical advantages in terms of structural simplification, versatility, adjustability, low-frequency vibration control capability, high load support capability, lightness and portability, and cost-effectiveness. It not only provides an efficient, practical and economical innovative solution for the field of vibration control and vibration isolation technology, but is also expected to be widely used in multiple industries, thereby promoting technological progress and development in related fields. Whether it is 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 to ensure the stable operation and precision improvement of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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.

[0021] 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.

[0022] Figure 3 The figure is a 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.

[0023] Figure 4 Schematic diagram of the working state of a pneumatic quasi-zero stiffness isolator based on a flat origami structure in a high stiffness support mode in an embodiment of the present invention.

[0024] Figure 5 The figure is a trend graph of the relationship between force and height 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.

[0025] In the figure, 1-carrying platform; 2-side plate; 3-folding plate; 4-base; 5-trachea. DETAILED DESCRIPTION

[0026] In modern industry and technology, vibration control technology is a key link to ensure the accuracy of equipment operation, extend service life, and improve system stability. From precision instruments to aerospace, from transportation to construction engineering, the application of vibration isolation technology runs through. However, in the context of these widespread applications, vibration isolation technology still faces many challenges in low-frequency vibration control and high-load support, especially in situations where lightness, adjustability, and versatility are required.

[0027] 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. times, which limits its vibration isolation ability in the low frequency band. In addition, the stiffness of traditional vibration isolators is usually fixed, which is difficult to adjust according to actual needs and cannot adapt to different working conditions. In recent years, quasi-zero stiffness vibration isolation technology has gradually become a research hotspot, but the existing technology still has problems such as cumbersome structure, limited adjustment range, and inconvenient portability. Especially in application scenarios that require both vibration isolation and high-rigidity support, it is difficult for existing technologies to provide effective solutions.

[0028] In view of this, it is particularly urgent to develop a new vibration isolation method or device. This device needs to overcome the shortcomings of traditional vibration isolators in terms of structural complexity, limited adjustment range, and inconvenience in carrying, while being lightweight, adjustable, and multifunctional to meet diverse working environments and load requirements. This application proposes a pneumatic quasi-zero stiffness vibration isolator based on a flat origami structure, which achieves switching of multiple working modes through pneumatic adjustment. It not only simplifies the structure of the vibration isolator, but also significantly improves its vibration isolation effect and adaptability, providing an innovative solution for the field of vibration control.

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0030] In the description of the present invention, it is to 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”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, 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, and therefore should not be understood as a limitation on the present invention.

[0031] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0033] Reference Figure 1 The figure is 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, which mainly includes an origami structure sealed cavity and an air pipe that provide adjustable stiffness in the vertical direction. The origami structure sealed cavity includes a bearing platform 1 and a base 4, the bearing platform 1 is connected to the base 4 through a plurality of side panels 2, and the side panels 2 are connected through folding panels 3; The pneumatic quasi-zero stiffness vibration isolator also includes an air pipe 5, which is connected to any side plate 2 and serves to transport gas. By controlling the input and output of gas, the air pressure in the sealed cavity of the origami structure is precisely adjusted, thereby driving the vibration isolator to switch between different working modes. The gas in the sealed cavity is used to support the bearing platform 1, and the internal driving force is provided by adjusting the air pressure, thereby changing the shape of the vibration isolator and realizing the adjustability of the stiffness of the sealed cavity.

[0034] The bearing platform 1 is a quadrilateral structure, located at the top of the structure, directly in contact with the equipment or object to be isolated, and is responsible for evenly transferring the external load to the entire sealed cavity. The base is also a quadrilateral, providing a stable support for the entire vibration isolator. Each side of the bearing platform 1 is connected to a side panel 2.

[0035] The base 4 is a quadrilateral structure, and each side of the base 4 is connected to a side panel 2 .

[0036] There are 8 side panels 2, all of which are trapezoidal structures, providing lateral support for the entire sealed cavity, and can cooperate with the folding plate 3 to adjust the stiffness distribution of the structure when the gas pressure changes. The longer bottom edge of the side panel 2 is connected to the longer bottom edges of other side panels 2, and the shorter bottom edge of the side panel 2 is connected to the bearing platform 1 or the base 4. Each side panel 2 is closely connected to the bearing platform 1, the base 4 and the adjacent folding plate 3 to form a stable frame structure, ensuring that the vibration isolator can maintain good morphological stability in different working modes.

[0037] There are 16 folding plates 3 in total, which are triangular structures and are key components for adjusting the stiffness of the vibration isolator. When the air pressure changes, the angles and relative positions between the folding plates 3 change accordingly, causing the stiffness of the entire sealed cavity to change in the vertical direction, interacting with the positive stiffness provided by the gas, thereby achieving flexible adjustment of the stiffness of the vibration isolator. One side of the folding plate 3 is connected to the side plate 2, and the other two sides are connected to other folding plates 3 respectively.

[0038] The components of the sealed cavity are connected in a way that is airtight and has good mobility. The bearing platform 1, the side panel 2, the folding plate 3 and the 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 bearing platform 1, the side panel 4, the folding plate 3 and the 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 way that is airtight, which can be crimping, threaded connection or clamp connection, etc., to meet the strict requirements for the airtightness of the vibration isolator in different scenarios.

[0039] The present application proposes a pneumatic quasi-zero stiffness isolator based on a flat origami structure, which has unique adjustable stiffness characteristics and can flexibly switch working modes according to different working environments and needs. The isolator is designed with three main modes: flat mode, quasi-zero stiffness vibration isolation mode and high stiffness support mode. By adjusting the internal air pressure through the air pipe 5, the isolator can achieve seamless switching between these modes, thereby adapting to various application scenarios such as low-frequency vibration isolation and high-load conditions. In addition, the foldable design of the isolator greatly facilitates its transportation and storage, and is particularly suitable for occasions that require frequent changes in the working environment, such as field operations, mobile equipment, etc. Compared with the prior art, the present invention not only has a simple structure, strong adaptability, and good vibration isolation effect, but also has a low manufacturing cost and has the potential for large-scale promotion and application.

[0040] Specifically, refer to Figure 2 As shown in the figure, when the air pressure is zero, the vibration isolator is in the flat mode, at which time the overall height of the vibration isolator is the smallest and the stiffness approaches zero. In this mode, the folding plate and side plates of the vibration isolator are in a fully unfolded state, with a compact structure that is easy to transport and store. As the air pressure gradually increases, the vibration isolator enters the quasi-zero stiffness vibration isolation mode, as shown in the figure. Figure 3 As shown. At this time, the dynamic stiffness of the vibration isolator approaches zero, which can effectively isolate low-frequency vibrations while providing a higher static load-bearing capacity. This mode is particularly suitable for application scenarios with high vibration control requirements, such as precision instruments, aerospace, etc. When the air pressure increases further and the height of the vibration isolator reaches the maximum value, it enters the high-stiffness support mode, such as Figure 4 At this time, the vibration isolator can withstand large external loads and is suitable for working conditions that require high-rigidity support, such as transportation, construction engineering, etc.

[0041] In actual use, the adjustable stiffness characteristics of the present invention are particularly prominent. By precisely adjusting the gas pressure, the vibration isolator can achieve a configuration change of the structure, accompanied by a change in 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 a fully expanded flat mode, such as Figure 2 As the air pressure gradually increases, when the structure height H=H1, as shown in Figure 3 As shown in Figure 1, the vibration isolator enters the quasi-zero stiffness vibration isolation mode. At this time, the curve of the change of the structural axial force F with the overall height H of the structure is as follows: Figure 5 As shown. The origami structure seals the cavity in the vertical direction and generates negative stiffness, while the gas provides positive stiffness in the vertical direction. The interaction between the two ensures that the vibration isolator is in an ideal state with dynamic stiffness close to zero under static load. This mechanical property of high static stiffness and low dynamic stiffness enables it to effectively isolate low-frequency vibrations. When the air pressure continues to increase and the structure height H=H2, as shown in Figure 4As shown in Figure 1, the vibration isolator enters a high-rigidity support mode and can withstand a large external load. The specific values ​​of H1 and H2 are closely related to the material and initial configuration of the cavity.

[0042] In actual operation, operators can accurately adjust the gas pressure and flexibly switch the working mode of the vibration isolator according to the actual needs of specific working conditions. This flexibility enables the vibration isolator to adapt to a variety of usage scenarios. Whether it is a precision instrument that requires low-frequency vibration isolation or a heavy equipment that requires high-rigidity support, the best vibration isolation effect can be achieved through simple gas pressure adjustment. In addition, the lightness and foldable design of the vibration isolator further enhance its convenience in practical applications, making it an efficient, practical and economical innovative solution in the field of vibration control.

[0043] The working principle of the present invention is based on the dynamic regulation mechanism of the stiffness of the origami structure by gas pressure. In the initial state, when the gas pressure is zero, the origami structure is in a fully unfolded flat state, at which time the overall height of the isolator is the smallest and the stiffness approaches zero. This state is particularly suitable for the transportation and storage of the isolator, because of its compact structure, small footprint, and easy to quickly deploy in different scenarios.

[0044] As the gas pressure gradually increases, the mechanical properties inside the origami structure begin to change. In the vertical direction, the origami structure exhibits negative stiffness characteristics, 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 a stiffness characteristic close to zero. At this time, the isolator enters a quasi-zero stiffness vibration isolation mode, which can effectively isolate low-frequency vibrations while providing a higher static load-bearing capacity. This mode is particularly suitable for application scenarios with extremely high requirements for vibration control, such as precision instruments, aerospace and other fields, and can significantly improve the operating accuracy and stability of the equipment.

[0045] As the air pressure continues to rise, the origami structure further deforms and eventually enters the high-rigidity support mode. At this point, the height of the isolator reaches its maximum value, and the overall stiffness increases significantly, making it able to withstand larger external loads. This mode is suitable for working conditions that require high-rigidity support, such as transportation, construction engineering, etc., to ensure the stability and safety of the equipment under high load conditions.

[0046] Through precise control of gas pressure, the origami structure can smoothly switch between different stiffness modes. This flexible and adjustable stiffness feature enables the vibration isolator to effectively meet the vibration control requirements under different working conditions, showing high adaptability and versatility. Users can easily switch the working mode of the vibration isolator by adjusting the gas pressure according to the specific application scenario, achieving a seamless transition from low-frequency vibration isolation to high-stiffness support.

[0047] 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 for the optimization of the structure, the selection of materials, or the 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 meet 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: It comprises a bearing platform (1) and a base (4), wherein the bearing platform (1) is connected to the base (4) via a plurality of side panels (2), and the side panels (2) are connected via folding panels (3); The pneumatic quasi-zero stiffness vibration isolator also 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 bearing platform (1) is a quadrilateral structure, and each side of the bearing platform (1) is respectively connected to a side plate (2).

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, and each side of the base (4) is respectively connected to one of the side panels (2).

4. The pneumatic quasi-zero stiffness vibration isolator based on a flat origami structure according to claim 1, characterized in that: The side panel (2) is a trapezoidal structure, the longer bottom side of the side panel (2) is connected to the longer bottom sides of 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).

5. The pneumatic quasi-zero stiffness vibration isolator based on a flat origami structure according to claim 1, characterized in that: 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).

6. The pneumatic quasi-zero stiffness vibration isolator based on a flat origami structure according to claim 1, characterized in that: The bearing platform (1), the side plate (2), the folding plate (3) and the base (4) are flexibly connected.

7. The pneumatic quasi-zero stiffness vibration isolator based on a flat origami structure according to claim 1, characterized in that: It comprises 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).

8. The pneumatic quasi-zero stiffness vibration isolator based on a flat origami structure according to claim 7, characterized in that: When the air pressure is zero, the vibration isolator is in a flat mode, at which time the overall height of the vibration isolator is the smallest and the stiffness approaches zero.

9. The pneumatic quasi-zero stiffness vibration isolator based on a flat origami structure according to claim 7, 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.

10. The pneumatic quasi-zero stiffness vibration isolator based on a flat origami structure according to claim 7, 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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