Vibration isolation unit and vibration isolator

Abstract

The application provides a vibration isolation unit and a vibration isolator, and relates to the technical field of vibration isolation. The vibration isolation unit comprises a pressure bearing seat and a support frame; the pressure bearing seat is connected to at least one side of the support frame; a plurality of rib groups are arranged inside the support frame; the plurality of rib groups are arranged at intervals along a direction perpendicular to the pressure bearing seat and the support frame; one end of the rib group close to the pressure bearing seat is connected to the pressure bearing seat; and one end of the rib group away from the pressure bearing seat is connected to the support frame. The vibration isolation unit and the vibration isolator provided by the application increase the overall carrying capacity, and improve the vibration isolation effect and long-term stability under high load conditions.

Description

Technical Field

[0001] This application relates to the field of vibration isolation technology, and in particular to a vibration isolation unit and a vibration isolator. Background Technology

[0002] Vibration isolators are key components in industrial equipment used to suppress vibration transmission and protect precision equipment or human comfort. Traditional vibration isolators mostly rely on materials such as springs and rubber to achieve stiffness adjustment, but their stiffness characteristics are fixed and difficult to adapt to complex working conditions.

[0003] Quasi-zero stiffness isolators based on metamaterial design have attracted attention due to their excellent performance in low-frequency vibration isolation. By combining positive and negative stiffness structures, quasi-zero stiffness isolators achieve near-zero stiffness within a specific displacement range, thereby significantly reducing vibration transmission.

[0004] However, existing metamaterial vibration isolators have insufficient overall load-bearing capacity, making it difficult to meet the vibration isolation requirements and long-term stability under high load conditions. Summary of the Invention

[0005] This application provides a vibration isolation unit and a vibration isolator to solve the problem of insufficient overall load-bearing capacity of the vibration isolator and to meet the vibration isolation requirements and long-term stability under high load conditions.

[0006] In a first aspect, this application provides a vibration isolation unit, including a bearing seat and a support frame;

[0007] The pressure-bearing seat is connected to at least one side of the support frame;

[0008] The support frame is provided with multiple rib groups, which are arranged at intervals in a direction perpendicular to the bearing seat and the support frame. The end of the rib group near the bearing seat is connected to the bearing seat, and the end of the rib group away from the bearing seat is connected to the support frame.

[0009] As an optional implementation, the rib group includes multiple positive stiffness support bars, with one end of the positive stiffness support bar near the pressure seat connected to the pressure seat, and the other end of the positive stiffness support bar away from the pressure seat connected to the support frame.

[0010] As an optional implementation, in the rib group, multiple positive stiffness support bars are arranged in a direction perpendicular to the bearing seat and the support frame.

[0011] As an optional implementation, the bearing seat is provided with an intermediate rib on the side facing the support frame; the intermediate rib is connected to the support frame, and part of the intermediate rib extends into the support frame; the end of the positive stiffness support bar near the bearing seat is connected to the intermediate rib.

[0012] As an optional implementation, the plurality of said stiffener groups include a first stiffener group and a second stiffener group;

[0013] The first and second rib groups are arranged symmetrically with respect to the extension lines of the intermediate rib.

[0014] As an optional implementation, the positive stiffness support bar includes a first connecting segment, a curved segment, and a second connecting segment connected in sequence. The end of the first connecting segment opposite to the curved segment is connected to the intermediate rib, and the end of the second connecting segment opposite to the curved segment is connected to the support frame.

[0015] The first connecting segment, the curved segment, and the second connecting segment form a curved structure, wherein in the first rib group, the concave side of the curved structure faces the second rib group.

[0016] As an optional implementation, the bending segment includes a first sub-bending segment, a third connecting segment, and a second sub-bending segment;

[0017] One end of the third connecting segment is tangent to and connected to the first sub-bending segment, and the other end of the third connecting segment is tangent to and connected to the second sub-bending segment.

[0018] The end of the first sub-bent segment that is away from the third connecting segment is tangential to and connected to the first connecting segment;

[0019] The end of the second sub-bending segment that is away from the third connecting segment is tangent to and connected to the second connecting segment.

[0020] As an optional implementation, along the direction opposite to the bearing seat and the support frame, in the first rib group, the height of the third connecting segment near the second rib group is less than or equal to the height of the third connecting segment away from the second rib group;

[0021] And / or, in a direction perpendicular to the bearing seat and the support frame, the width of the positive stiffness support strip closer to the second stiffness support strip in the first stiffness strip group is less than or equal to the width of the positive stiffness support strip farther away from the second stiffness strip group.

[0022] As an optional implementation, along the direction opposite to the bearing seat and the support frame, the ratio of the height of the first connecting segment to the height of the positive stiffness support bar is greater than or equal to 0.002 and less than or equal to 0.4.

[0023] And / or, along the direction opposite to the bearing seat and the support frame, the ratio of the height of the third connecting segment to the height of the positive stiffness support bar is greater than or equal to 0.004 and less than or equal to 0.8.

[0024] As an optional implementation, along the direction perpendicular to the bearing seat and the support frame, the ratio of the width of the positive stiffness support bar to the width of the vibration isolation unit is greater than or equal to 0.06 and less than 0.5.

[0025] And / or, along the direction opposite to the bearing seat and the support frame, the ratio of the height of the positive stiffness support bar to the height of the vibration isolation unit is greater than or equal to 0.05 and less than 1;

[0026] And / or, along a direction perpendicular to the bearing seat and the support frame, the ratio of the thickness of the positive stiffness support strip to the width of the vibration isolation unit is greater than or equal to 0.001 and less than or equal to 0.1.

[0027] As an optional implementation, the intermediate rib is provided with a first connecting part at one end inside the support frame, and the first connecting part is connected to the end of the positive stiffness support bar near the pressure seat.

[0028] As an optional implementation, the first connecting portion extends in a direction perpendicular to the bearing seat and the support frame;

[0029] In the rib group, the end of each positive stiffness support bar near the bearing seat is connected to the surface of the first connecting part away from the bearing seat.

[0030] As an optional implementation, a first transition portion is provided at the junction of the positive stiffness support bar and the first connecting portion.

[0031] As an optional implementation, the first connecting portion extends along the direction opposite to the pressure bearing seat and the support frame;

[0032] In the rib group, the ends of each positive stiffness support bar near the bearing seat are connected to form a first integrated part, which is connected to the first connecting part.

[0033] As an optional implementation, the support frame includes a top support member and a bottom support member spaced apart along the direction opposite to the bearing seat and the support frame;

[0034] The top support is connected to the intermediate rib, and the bottom support is connected to the end of the positive stiffness support bar that is away from the pressure seat.

[0035] As an optional implementation, in the rib group, the end of each positive stiffness support bar facing away from the pressure seat is respectively connected to the surface of the bottom support member facing the pressure seat.

[0036] As an optional implementation, a second transition portion is provided at the junction of the positive stiffness support bar and the bottom support member.

[0037] As an optional implementation, the bottom support member has a second connecting portion on its surface facing the pressure seat, and the second connecting portion extends along the direction opposite to the pressure seat and the support frame;

[0038] In the rib group, the ends of each positive stiffness support bar near the bearing seat are connected to form a second integrated part, which is connected to the second connecting part.

[0039] As an optional implementation, the support frame further includes a side support member, which connects the top support member and the bottom support member;

[0040] The top support, the side support, and the bottom support form a receiving area, and the rib group is arranged within the receiving area.

[0041] As an optional implementation, the extension direction of the side support member and the extension direction of the bottom support member have an angle, the angle being greater than or equal to 80° and less than or equal to 90°.

[0042] As an optional implementation, a fourth transition portion is provided at the junction of the surface of the top support member facing the pressure seat and the surface of the side support member away from the receiving area;

[0043] A fifth transition section is provided at the junction of the surface of the top support member away from the pressure seat and the surface of the side support member facing the receiving area.

[0044] As an optional implementation, the top support includes multiple negative stiffness support bars;

[0045] The multiple negative stiffness support bars are arranged parallel to each other and spaced apart along the opposite direction of the bearing seat and the support frame.

[0046] As an optional implementation, the negative stiffness support bar is a straight support bar;

[0047] Alternatively, the negative stiffness support bar may be an arc-shaped support bar, with the concave side of the arc-shaped support bar facing the bottom support member.

[0048] As an optional implementation, a third transition section is provided at the junction of the negative stiffness support bar and the intermediate rib.

[0049] As an optional implementation, along the direction opposite to the bearing seat and the support frame, the ratio of the thickness of the negative stiffness support bar to the height of the vibration isolation unit is greater than or equal to 0.001 and less than or equal to 0.1.

[0050] As an optional implementation, the thickness of the vibration isolation unit is greater than or equal to 1 mm and less than or equal to 1000 mm along the thickness direction of the vibration isolation unit.

[0051] As an optional implementation, the ratio of the height of the vibration isolation unit along the direction opposite to the bearing seat and the support frame to the width of the vibration isolation unit along the direction perpendicular to the direction opposite to the bearing seat and the support frame is greater than or equal to 0.2 and less than or equal to 5.

[0052] As an optional implementation, the vibration isolation unit is an integral structure.

[0053] As an optional implementation, the vibration isolation unit has a symmetrical structure, and the axis of symmetry of the vibration isolation unit coincides with the extension line of the intermediate rib.

[0054] As an optional implementation, the vibration isolation unit is made of one of the following materials: metal, composite material, and polymer material.

[0055] Secondly, this application provides a vibration isolator, including at least one vibration isolation unit of any of the above-mentioned types;

[0056] Multiple vibration isolation units are arrayed in a plane perpendicular to the thickness direction of the vibration isolation unit.

[0057] As an optional implementation, in the direction opposite to the bearing seat and the support frame, in two adjacent vibration isolation units, the support frame of one vibration isolation unit is connected to the bearing seat of the other vibration isolation unit.

[0058] As an optional implementation, in a direction perpendicular to the bearing seat and the support frame, the bearing seats of two adjacent vibration isolation units are connected, and the support frames of two adjacent vibration isolation units are connected.

[0059] The vibration isolation unit and vibration isolator provided in this application include a bearing seat and a support frame. The bearing seat is connected to at least one side of the support frame. Multiple rib groups are provided inside the support frame. The multiple rib groups are arranged at intervals along a direction perpendicular to the bearing seat and the support frame. The end of the rib group near the bearing seat is connected to the bearing seat, and the end of the rib group away from the bearing seat is connected to the support frame.

[0060] By setting multiple rib groups within the support frame of the vibration isolation unit, a high-strength frame composed of multiple rib groups connected in parallel is formed. When the bearing seat is subjected to a load along the direction opposite to the bearing seat and the support frame, the multiple rib groups arranged at intervals perpendicular to the direction opposite to the bearing seat and the support frame can effectively disperse the pressure, avoid local overload damage, improve the durability and load-bearing capacity of the vibration isolator, and can better meet the vibration isolation requirements and long-term stability under high load conditions. Attached Figure Description

[0061] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0062] Figure 1 Schematic diagram of the vibration isolation unit provided in the embodiments of this application Figure 1 ;

[0063] Figure 2 Schematic diagram of the vibration isolation unit provided in the embodiments of this application Figure 2 ;

[0064] Figure 3 This is a schematic diagram of the structure of the vibration isolator provided in the embodiments of this application;

[0065] Figure 4 This is a structural schematic diagram of the stiffener group in the vibration isolation unit provided in the embodiments of this application;

[0066] Figure 5 This is a structural schematic diagram of the top support member in the vibration isolation unit provided in the embodiments of this application;

[0067] Figure 6 This is a schematic diagram of the structure of the vibration isolation unit provided in the embodiment of this application in a compressed state;

[0068] Figure 7 This is another structural schematic diagram of the vibration isolation unit provided in the embodiments of this application;

[0069] Figure 8 Another structural schematic diagram of the vibration isolation unit provided in the embodiments of this application;

[0070] Figure 9 Pressure-displacement curves of the vibration isolation unit provided in the embodiments of this application Figure 1 ;

[0071] Figure 10 Pressure-displacement curves of the vibration isolation unit provided in the embodiments of this application Figure 2 .

[0072] Explanation of reference numerals in the attached figures:

[0073] 10. Vibration isolation unit;

[0074] 100. Pressure bearing seat;

[0075] 110. Intermediate reinforcement;

[0076] 111. First connecting part;

[0077] 200. Support frame; 201. Accommodation area;

[0078] 210. Top support component; 2101. Fourth transition section; 2102. Fifth transition section;

[0079] 211. Negative stiffness support bar; 2111. Third transition section;

[0080] 220. Bottom support component;

[0081] 221. Second connecting part;

[0082] 230. Side support components;

[0083] 300, Reinforcing bar group; 301, First reinforcing bar group; 302, Second reinforcing bar group;

[0084] 310. Positive stiffness support bar; 3101. First transition section; 3102. Second transition section;

[0085] 311. First connecting segment;

[0086] 312. Bending segment; 3121. First sub-bending segment; 3122. Third connecting segment; 3123. Second sub-bending segment;

[0087] 313. Second connecting segment.

[0088] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0089] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the embodiments of this application.

[0090] In the embodiments of this application, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly for better describing the embodiments of this application and their implementations, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may also be used in some cases to indicate a certain dependency or connection relationship. For those skilled in the art, the specific meaning of these terms in the embodiments of this application can be understood according to the specific circumstances.

[0091] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; 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 an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0092] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the present application described herein can be implemented, for example, in orders other than those illustrated or described herein.

[0093] In this application, the terms "exemplarily" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplarily" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplarily" or "for example" is intended to present the relevant concepts in a specific manner.

[0094] As the background technology indicates, vibration isolators are key components in industrial equipment used to suppress vibration transmission and protect precision equipment or human comfort. For example, in the fields of electric vehicles and energy storage systems, vibration isolators can be installed in battery modules to significantly improve the reliability, safety, and lifespan of battery systems by effectively isolating, attenuating, and absorbing mechanical energy transmitted from the vehicle chassis or external environment.

[0095] Traditional vibration isolators mostly rely on materials such as springs and rubber to adjust stiffness, but their stiffness characteristics are fixed and difficult to adapt to complex working conditions.

[0096] Quasi-zero stiffness isolators based on metamaterial design have attracted attention due to their excellent performance in low-frequency vibration isolation. By combining positive and negative stiffness structures, quasi-zero stiffness isolators achieve near-zero stiffness within a specific displacement range, thereby significantly reducing vibration transmission.

[0097] However, existing metamaterial vibration isolators have insufficient overall load-bearing capacity, making it difficult to meet the vibration isolation requirements and long-term stability under high load conditions.

[0098] In view of this, the present application provides a vibration isolation unit and a vibration isolator. The vibration isolation unit includes a bearing seat and a support frame. The bearing seat is connected to at least one side of the support frame. The support frame is provided with a plurality of rib groups. The plurality of rib groups are arranged at intervals along a direction perpendicular to the bearing seat and the support frame. The end of the rib group near the bearing seat is connected to the bearing seat, and the end of the rib group away from the bearing seat is connected to the support frame.

[0099] By setting multiple rib groups within the support frame of the vibration isolation unit, a high-strength frame composed of multiple rib groups connected in parallel is formed. When the bearing seat is subjected to a load along the direction opposite to the bearing seat and the support frame, the multiple rib groups arranged at intervals perpendicular to the direction opposite to the bearing seat and the support frame can effectively disperse the pressure, avoid local overload damage, improve the durability and load-bearing capacity of the vibration isolator, and can better meet the vibration isolation requirements and long-term stability under high load conditions.

[0100] The technical solution of this application will be described in detail below with reference to the accompanying drawings and specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0101] Combination Figure 1 and Figure 2 As shown, one embodiment of this application provides a vibration isolation unit 10, including a pressure bearing seat 100 and a support frame 200; the pressure bearing seat 100 is connected to at least one side of the support frame 200.

[0102] Understandably, the bearing seat 100 is used to directly bear external loads, and the support frame 200 is used to provide main support and elastic restoring force.

[0103] It should be noted that, taking the load direction as parallel to the first direction Z as an example, the bearing seat 100 can be connected to one side of the support frame 200 along the first direction Z so as to abut against the load generating surface from one side of the support frame 200 along the first direction Z.

[0104] The bearing seat 100 can also be disposed on the opposite side of the support frame 200 along the first direction Z, so as to abut against the load generating surface from both sides of the support frame 2000 along the first direction Z.

[0105] The support frame 200 is provided with multiple rib groups 300. The multiple rib groups 300 are arranged at intervals in a direction perpendicular to the bearing seat 100 and the support frame 200. The end of the rib group 300 close to the bearing seat 100 is connected to the bearing seat 100, and the end of the rib group 300 away from the bearing seat 100 is connected to the support frame 200.

[0106] By setting multiple rib groups 300 in the support frame 200 of the vibration isolation unit 10, a high-strength frame composed of multiple rib groups 300 connected in parallel is formed. When the pressure seat 100 bears the load along the direction opposite to the pressure seat 100 and the support frame 200, the multiple rib groups 300 arranged at intervals perpendicular to the direction opposite to the pressure seat 100 and the support frame 200 can effectively disperse the pressure, avoid local overload damage, improve the durability and load-bearing capacity of the vibration isolator, and can better meet the vibration isolation requirements and long-term stability under high load conditions.

[0107] Specifically, combined Figure 1 As shown, taking the load direction as parallel to the first direction Z as an example, the opposite direction of the bearing seat 100 and the support frame 200 can be the first direction Z, that is, the bearing seat 100 and the support frame 200 can be set along the first direction Z.

[0108] If the first direction Z, the second direction Y, and the third direction X are all orthogonal to each other, then the direction perpendicular to the bearing seat 100 and the support frame 200 can be either the second direction Y or the third direction X. That is, multiple stiffener groups 300 can be arranged along the second direction Y or the third direction X.

[0109] Combination Figure 1 As shown, the following explanation will be based on the example where the bearing seat 100 and the support frame 200 are arranged along the first direction Z, and multiple rib groups 300 can be arranged along the second direction Y. The first direction Z is parallel to the direction of the load applied to the bearing seat 100.

[0110] A bearing seat 100 and a support frame 200 are arranged along the first direction Z; a middle rib 110 is provided on the side of the bearing seat 100 facing the support frame 200. Part of the middle rib 110 extends into the support frame 200. The end of the rib group 300 near the bearing seat 100 is connected to the middle rib 110 extending into the support frame 200.

[0111] The bearing seat 100 and the support frame 200 are arranged along the first direction Z, which can form a structure with deformation space, serving as the basic framework for realizing vibration isolation function.

[0112] A central rib 110 is provided on the side of the bearing seat 100 facing the support frame 200, and the bearing seat 100 is connected to the support frame 200 through the central rib 110. This arrangement enables force transmission. External loads are transmitted through the bearing seat 100 to the central rib 110, and then through the central rib 110 to the support frame 200.

[0113] The stiffener assembly 300 includes multiple positive stiffness support bars 310. The end of the positive stiffness support bar 310 near the pressure seat 100 is connected to the intermediate rib 110 extending into the support frame 200, and the end of the positive stiffness support bar 310 away from the pressure seat 100 is connected to the bottom support member 220.

[0114] The support frame 200 includes a top support member 210 and a bottom support member 220 spaced apart along a first direction Z. The top support member 210 is connected to the intermediate rib 110. The top support member 210 can be a structure for achieving negative stiffness characteristics. When the bearing seat 100 is compressed and moves downward, the top support member 210 will bend or buckle, and the direction of the restoring force generated may be opposite to the direction of deformation for a certain period of time, thereby providing a negative stiffness effect.

[0115] The top support 210 and the bottom support 220 can form a load-bearing platform for the support frame 200, providing a stable installation foundation for the internal rib group 300, ensuring that the deformation of all positive stiffness support bars 310 is coordinated and consistent, and that they jointly bear the load, so that the vibration isolation unit 10 forms a high-strength overall frame.

[0116] Multiple rib groups 300 are provided between the top support member 210 and the bottom support member 220, and the multiple rib groups 300 can be arranged along the second direction Y.

[0117] Multiple stiffener groups 300 can form parallel load transfer paths. The total stiffness and buckling critical load of multiple stiffener groups 300 working in parallel are much higher than those of a single stiffener, thereby greatly enhancing the overall stiffness and crush resistance of the support frame 200, enabling it to withstand high loads.

[0118] The multiple stiffener groups 300 arranged along the second direction Y enable the load to be effectively distributed along multiple paths, further optimizing the stress distribution and avoiding stress concentration in a single plane.

[0119] The stiffener group 300 includes multiple positive stiffness support bars 310. Within each stiffener group 300, the multiple support bars are connected in parallel again, further subdividing the load borne by this group onto each support bar, increasing the number of load transmission paths, and significantly reducing the actual stress level of a single support bar.

[0120] When the bearing seat 100 moves downward under pressure, the positive stiffness support bar 310 will also bend or buckle. The direction of the restoring force generated may be the same as the direction of deformation within a certain period, thereby providing a positive stiffness effect. Combined with the negative stiffness of the top support 210, it can achieve quasi-zero stiffness characteristics.

[0121] It should be noted that a single vibration isolation unit 10 can be used independently to meet the vibration isolation requirements of small equipment; multiple vibration isolation units 10 can be combined and arranged (e.g., array arrangement) to jointly support larger and more complex equipment, thereby achieving wide adaptability to equipment with different loads and sizes, and improving the application range and economy of the product.

[0122] Specifically, the vibration isolation unit 10 provided in this application embodiment forms a high-strength frame composed of multiple positive stiffness support bars 310 connected in parallel by setting multiple stiffness support bars 300 between the top support member 210 and the bottom support member 220. The multiple positive stiffness support bars 310 in the stiffness support bar group 300 improve the overall stiffness and buckling critical load of the vibration isolation unit 10 through multi-path load diversion, thereby enabling it to withstand higher pressure.

[0123] Furthermore, the multiple positive stiffness support bars 310 in the stiffener group 300 help to achieve uniform stress distribution, increase the buffer force per unit area, reduce the stress concentration factor and the maximum alternating stress amplitude, and improve the durability of the vibration isolator under high cyclic loads. Therefore, the vibration isolator provided in this application embodiment can better meet the vibration isolation requirements and long-term stability under high load conditions.

[0124] Combination Figure 1 , Figure 7 and Figure 8 As shown, specifically, in the stiffener group 300, multiple positive stiffness support bars 310 can be arranged along the second direction Y.

[0125] Multiple positive stiffness support bars 310 are arranged along the second direction Y, which increases the density and strength of the structure in the plane perpendicular to the first direction Z (i.e. the load direction), thus enhancing the stability of the structure.

[0126] Combination Figure 6 As shown, multiple positive stiffness support bars 310 can be arranged at intervals, which helps to ensure that each positive stiffness support bar 310 has an independent and clear deformation space and load transfer path, so that the stress can be more evenly distributed on the cross section of the entire stiffener group 300.

[0127] By arranging the bars at intervals, necessary space can be provided for the minor bending or buckling deformation that may occur when the positive stiffness support bars 310 are under compression, thus avoiding interference between the positive stiffness support bars 310; it can also avoid the overlap and interference of stress fields, thus preventing the formation of new and larger stress concentration areas; it can also avoid unnecessary accumulation of materials, effectively reducing the amount of materials used without significantly weakening the structural stiffness and strength, which helps to achieve lightweight design of the structure, reduce manufacturing costs and the self-weight of the vibration isolator.

[0128] Specifically, the spacing between two adjacent positive stiffness support bars 310 can be flexibly set according to the space requirements and manufacturability of the vibration isolator, and this application embodiment does not impose any restrictions.

[0129] It should be noted that, in order to avoid local failure caused by uneven interlayer stress transfer among multiple positive stiffness support bars 310 in the stiffener group 300, the spacing width between adjacent positive stiffness support bars 310 can be adjusted (such as by adopting an equal spacing or a gradually changing spacing design) to ensure uniform stress transfer during compression.

[0130] Alternatively, multiple positive stiffness support bars 310 can be made of materials with different elastic moduli (such as high modulus for the outer layer and low modulus for the inner layer) to balance the stress distribution.

[0131] Combination Figure 1 As shown, in some embodiments, the plurality of rib groups 300 include a first rib group 301 and a second rib group 302; in the plane containing the first direction Z and the second direction Y, the first rib group 301 and the second rib group 302 are symmetrically arranged with respect to the extension line of the intermediate rib 110.

[0132] Understandably, the multiple stiffener groups 300, including a symmetrically arranged first stiffener group 301 and second stiffener group 302, ensure the symmetry of load distribution. When an external load acts on the bearing seat 100 along the first direction Z, the symmetrical structure ensures that the load, after passing through the intermediate stiffener 110, is evenly distributed to the first stiffener group 301 and the second stiffener group 302. This avoids eccentric loads or additional bending moments caused by structural asymmetry, preventing the vibration isolator from tilting or undergoing uneven deformation.

[0133] Furthermore, symmetrical force means that the stress state of the positive stiffness support bars 310 in symmetrical positions is basically the same, which can achieve a better stress uniformity state, help eliminate local high stress areas caused by uneven force, and thus improve the fatigue life and long-term reliability of the vibration isolator under vibration load.

[0134] Furthermore, the symmetrical structure ensures consistent stiffness characteristics of the vibration isolator along the symmetrical direction. During operation, the mechanical response of the vibration isolator is stable and predictable, especially near the equilibrium point of quasi-zero stiffness. Symmetry helps maintain system stability and ensures consistent vibration isolation performance.

[0135] Combination Figure 4 As shown, in some embodiments, the positive stiffness support bar 310 includes a first connecting segment 311, a bending segment 312, and a second connecting segment 313 connected in sequence. The end of the first connecting segment 311 facing away from the bending segment 312 is connected to the intermediate rib 110; the end of the second connecting segment 313 facing away from the bending segment 312 is connected to the bottom support member 220.

[0136] The connecting sections at both ends of the bending section 312 are mainly used to provide stable connection and stiffness, while the bending section 312 in the middle is used to achieve specific nonlinear mechanical behavior.

[0137] The positive stiffness support bar 310 is connected to the intermediate rib 110 and the bottom support member 220 through the straight section, which ensures the stability of the connection and the smoothness of force transmission. It helps to avoid stress concentration at the connection point and ensures that the load can be smoothly transferred from the top support member 210 to the curved section 312 and then to the bottom support member 220 at the other end, thereby improving the reliability and fatigue life of the structure.

[0138] The first connecting segment 311, the curved segment 312, and the second connecting segment 313 form a curved structure. In the first rib group 301, the concave side of the curved structure faces the second rib group 302.

[0139] Understandably, in the first stiffener group 301, the concave side of the curved structure faces the second stiffener group 302. That is, in the first stiffener group 301 and the second stiffener group 302, which are arranged opposite to each other, the curved structure formed by the positive stiffness support strip 310 is distributed in a U-shape.

[0140] When the bearing seat 100 is pressed down along the first direction Z, the symmetrically bent support bar will generate symmetrical deformation and restoring force, which together counteract the component in the second direction Y, ensuring that the entire structure only undergoes vertical translation, thus avoiding the tendency of lateral instability or torsion and enhancing the stability of the system.

[0141] Furthermore, the bending form of the bending segment 312 of the positive stiffness support bar 310 can also prevent interference between the stiffener groups 300 when there is no bending.

[0142] It should be noted that the extension directions of the first connecting segment 311 and the second connecting segment 313 can be straight lines or approximately straight lines. The overall curved structure can be a curve with a large degree of curvature in the middle and gentle curves at both ends.

[0143] The large degree of curvature in the middle section is equivalent to increasing the effective length of the structure and reducing the local bending stiffness in that region. This causes the bending segment 312 to preferentially undergo large-scale, flexible bending deformation (similar to a spring) when subjected to axial pressure, thereby absorbing energy and providing the required, adjustable nonlinear positive stiffness, rather than brittle failure.

[0144] The first connecting segment 311 and the second connecting segment 313, which are straight or nearly straight at both ends of the curved segment 312, can reduce the degree of bending at the sharp corners at both ends and form a gentle transition zone. This helps to reduce the stress concentration factor at the junction of the end of the curved segment 312 and the connecting part, and effectively prevents cracks from initiating and propagating from the sharp corners under high cyclic loads.

[0145] Specifically, in some embodiments, the bending segment 312 includes a first sub-bending segment 3121, a third connecting segment 3122, and a second sub-bending segment 3123; one end of the third connecting segment 3122 is tangential to and connected to the first sub-bending segment 3121, and the other end of the third connecting segment 3122 is tangential to and connected to the second sub-bending segment 3123.

[0146] The bending segment 312 is composed of a first sub-bending segment 3121, a third connecting segment 3122, and a second sub-bending segment 3123 connected in sequence. The required nonlinear force-displacement curve can be achieved by adjusting the curvature and direction of the two sub-bending segments and the length of the middle straight segment, thereby achieving a better match with the negative stiffness mechanism.

[0147] The two ends of the third connecting segment 3122 are tangent to and connected to the first sub-bending segment 3121 and the second sub-bending segment 3123, respectively. This ensures that the internal force is transmitted smoothly and continuously in the structure, avoids sudden changes in force, maximizes the utilization of the material's mechanical properties, and makes the structural response more stable and reliable.

[0148] The first sub-bending segment 3121, at one end away from the third connecting segment 3122, is tangent to and connected to the first connecting segment 311; the second sub-bending segment 3123, at one end away from the third connecting segment 3122, is tangent to and connected to the second connecting segment 313. With this configuration, all transition areas along the entire load path from the intermediate rib 110 to the bottom support 220 are smooth, and the entire positive stiffness support strip 310 can form a load-bearing unit with uniform stress distribution, effectively avoiding stress concentration.

[0149] It should be noted that the first sub-bending segment 3121 and the second sub-bending segment 3123 can each be formed by multiple sequentially connected curved segments, and two adjacent curved segments are arranged tangentially. The extension direction of the third connecting segment 3122 can be a straight line or an approximately straight line.

[0150] Specifically, in the plane containing the first direction Z and the second direction Y, the positive stiffness support bar 310 can be a symmetrical structure with its axis of symmetry perpendicular to the first direction Z and located at the center of the positive stiffness support bar (310) along the first direction Z.

[0151] It is understandable that since the first direction Z is the direction of the main load, the positive stiffness support bar 310 is symmetrical about the plane perpendicular to the direction of the main load.

[0152] When subjected to pressure, the two symmetrical connecting sections ensure that the load can be transmitted along the geometric centerline of the positive stiffness support bar 310, avoiding the generation of additional bending moment or eccentric load, and placing it in an ideal axial compression state with high material utilization efficiency.

[0153] Furthermore, the symmetrical first connecting segment 311 and second connecting segment 313 can also provide boundary constraints for the bending segment 312, ensuring the predictability and repeatability of the deformation behavior of the bending segment 312.

[0154] It is understandable that the first sub-bending segment 3121 and the second sub-bending segment 3123 can be arranged symmetrically with the same shape and curvature.

[0155] When the positive stiffness support bar 310 is compressed along the first direction Z, the deformation modes of its upper and lower parts are mirror symmetrical and its stiffness characteristics are consistent. Therefore, the stress distribution in the structure is also symmetrical, which further promotes the homogenization of stress and helps to eliminate potential asymmetric fatigue sources.

[0156] Specifically, the symmetrical structure helps ensure that the deformation behavior, internal force distribution and stress state of a single positive stiffness support bar 310 are symmetrical and consistent when subjected to axial loads. This can eliminate the risk of eccentric loads, local stress concentration or instability caused by its own geometric asymmetry, and effectively improve the load-bearing capacity and fatigue life of the material.

[0157] It should be noted that in the stiffener group 300, the shape and size of each positive stiffness support bar 310 can be exactly the same. The positive stiffness support bars 310 can be distributed at intervals between the top support member 210 and the bottom support member 220.

[0158] Combination Figure 1 and Figure 4 As shown, in the stiffener group 300, the shape and size of each positive stiffness support bar 310 can be different. Specifically, along the first direction Z, in the first stiffener group 301, the height of the third connecting segment 3122 near the second stiffener group 302 is less than or equal to the height of the third connecting segment 3122 away from the second stiffener group 302.

[0159] By differentiating the design of the third connecting segment 3122 of the support bars 310 with different positive stiffness within the same stiffening group 300, the area with lower stiffness will preferentially undergo greater bending deformation under load. This arrangement helps guide the deformation sequence, allowing the positive stiffness support bars 310 in the first stiffening group 301 that are closer to the second stiffening group 302 to participate in deformation earlier and more extensively, thereby more effectively dispersing the load from the high-stress area and improving fatigue life.

[0160] More specifically, along the second direction Y, in the first stiffener group 301, the width of the positive stiffness support strip 310 closer to the second stiffener group 302 is less than or equal to the width of the positive stiffness support strip 310 farther away from the second stiffener group 302.

[0161] Understandably, by designing the widths of the support bars 310 with different positive stiffness within the same stiffening bar group 300, interference between the positive stiffness support bars 310 can be avoided during the deformation of the positive stiffness support bars 310.

[0162] Combination Figure 1 , Figure 7 and Figure 8 As shown, in some embodiments, a portion of the intermediate rib 110 extends into the support frame 200, and a first connecting portion 111 is provided at one end of the intermediate rib 110 located in the support frame 200. The first connecting portion 111 is connected to the end of the positive stiffness support bar 310 near the pressure seat 100.

[0163] The first connecting part 111 is located inside the support frame 200 and is connected to the end of the intermediate rib 110. It is located at the force flow hub where the load from the bearing seat 100 is transmitted downward to the entire support frame 200, and can be used to optimize the force transmission path.

[0164] The first connecting part 111 is connected to the end of the positive stiffness support bar 310 near the bearing seat 100, thus preventing the end of the positive stiffness support bar 310 from being directly connected to the top support member 210. As a load distributor, the first connecting part 111 can distribute the concentrated load from the intermediate rib 110 more smoothly and evenly to the multiple positive stiffness support bars 310 connected to it, thereby alleviating the stress concentration phenomenon at the connection point.

[0165] Combination Figure 1 As shown, specifically, the first connecting portion 111 extends along the second direction Y. In the rib group 300, the end of each positive stiffness support bar 310 near the pressure seat 100 is connected to the surface of the first connecting portion 111 away from the pressure seat 100.

[0166] Understandably, when multiple positive stiffness support bars 310 need to converge at a point, direct connection may lead to structural complexity and stress concentration. The first connecting part 111 extends along the second direction Y and can act as an integrated comb-like structure, providing regular and independent connection points for each positive stiffness support bar 310, so as to clearly organize the force flow path, avoid mutual interference of multiple support bars, and reduce stress concentration.

[0167] Specifically, the compressive stress flow from the bearing seat 100 passes sequentially through the intermediate rib 110 and the first connecting part 111, and then downwards to the positive stiffness support bar 310. The first connecting part 111 can spatially separate the direct pressure of the bearing seat 100 from the connection interface of the support bar, ensuring that the connection is in a shear or tensile state, rather than a complex compressive and shear combined stress state, thereby improving the reliability and fatigue strength of the connection.

[0168] For example, the first connecting portion 111 may be a strip-shaped or beam-shaped structure extending along the second direction Y.

[0169] In some embodiments, a first transition portion 3101 is provided at the junction of the positive stiffness support bar 310 and the first connecting portion 111.

[0170] Understandably, in a structure, the junctions where different components are connected (especially at a certain angle) are prone to stress concentration due to abrupt changes in geometry, making them high-risk areas for crack initiation and propagation.

[0171] By providing a first transition portion 3101 at the junction of the positive stiffness support bar 310 and the first connecting portion 111, the first transition portion 3101 can reduce the stress level at the angle between the positive stiffness support bar 310 and the first connecting portion 111 during compression, which helps to reduce breakage and improve service life.

[0172] Specifically, the first transition portion 3101 can be a structure with a chamfer, fillet, or other smooth curve transition provided at the junction of the positive stiffness support bar 310 and the first connecting portion 111.

[0173] The first transition section 3101 provides a smooth force flow channel, which can significantly reduce the stress concentration coefficient of the junction area between the positive stiffness support bar 310 and the first connection section 111, and distribute the stress more evenly over a larger area, thereby improving the fatigue resistance and structural durability of the vibration isolator under long-term high-frequency vibration loads.

[0174] Combination Figure 8As shown, it should be noted that the shape of the positive stiffness support bar 310 can also be other shapes. For example, a semi-O-shape, the first stiffener group 301 and the second stiffener group 302 are symmetrically arranged in the second direction Y, and the positive stiffness support bar 310 in the first stiffener group 301 and the second stiffener group 302 can form a complete O-shape.

[0175] Combination Figure 7 and Figure 8 As shown, in some other embodiments, the first connecting portion 111 extends along the first direction Z. In the rib assembly 300, each positive stiffness support bar 310 is connected at one end near the bearing seat 100 to form a first integrated portion, which is connected to the first connecting portion 111.

[0176] Understandably, the first direction Z is the direction of the main load. The first connecting part 111 extends along the first direction Z, enabling it to directly bear and transmit axial pressure, thereby enhancing the local stiffness and stability of the top region of the intermediate rib 110.

[0177] In the rib assembly 300, multiple positive stiffness support bars 310 are first connected to each other at the top to form a first integrated part, which is connected to the first connecting part 111.

[0178] The first integrated section can bear and distribute the load as a whole; and it also helps to simplify the structure and manufacturing process and reduce the number of parts.

[0179] In specific implementation, the force flow path is: intermediate rib 110, first connecting part 111, first integrated part, and each positive stiffness support bar 310.

[0180] For example, the first connecting portion 111 may be a boss, rib, or short post extending along the first direction Z.

[0181] Specifically, in the rib group 300, the junctions of each positive stiffness support bar 310 and the junctions of the first integrated part and the first connecting part 111 can also be provided with a smooth curve transition structure to reduce the stress level at the junctions of the positive stiffness support bars 310 and the junctions of the first integrated part and the first connecting part 111, thereby reducing fracture and improving service life.

[0182] Combination Figure 1 As shown, in some embodiments, in the rib group 300, the end of each positive stiffness support bar 310 away from the pressure seat 100 is connected to the surface of the bottom support member 220 facing the pressure seat 100.

[0183] Understandably, in the stiffener group 300, the end of each positive stiffness support bar 310 that is away from the bearing seat 100 is the fixed end where the positive stiffness support bar 310 undergoes bending deformation and provides restoring force.

[0184] The end of the positive stiffness support bar 310 facing away from the pressure seat 100 is connected to the surface of the bottom support member 220 facing the pressure seat 100. Thus, the positive stiffness support bar 310 has sufficient deformation space. When the pressure seat 100 is pressed down, the bottom end of the positive stiffness support bar 310 can rotate and bend smoothly around the connection point, ensuring that deformation can be generated to provide nonlinear stiffness without interfering with the bottom support member 220.

[0185] All loads along the first direction Z are ultimately borne and distributed by the bottom support 220, which makes the vibration isolation unit 10 more stable and less prone to instability.

[0186] In some embodiments, a second transition portion 3102 is provided at the junction of the positive stiffness support bar 310 and the bottom support member 220.

[0187] By providing a second transition portion 3102 at the junction of the positive stiffness support bar 310 and the bottom support member 220, the second transition portion 3102 can reduce the stress level at the angle between the positive stiffness support bar 310 and the bottom support member 220 during compression, which helps to reduce fracture and improve service life.

[0188] Specifically, the second transition section 3102 is a structure with a chamfer, rounded corner or other smooth curve transition provided at the junction of the positive stiffness support bar 310 and the bottom support member 220.

[0189] The second transition section 3102 provides a smooth force flow channel, which can significantly reduce the stress concentration coefficient in the junction area between the positive stiffness support bar 310 and the bottom support member 220, and distribute the stress more evenly over a larger area, thereby improving the fatigue resistance and structural durability of the vibration isolator under long-term high-frequency vibration loads.

[0190] Combination Figure 7 and Figure 8 As shown, in some embodiments, the bottom support 220 has a second connecting portion 221 on its surface facing the pressure seat 100, and the second connecting portion 221 extends along the first direction Z. In the rib group 300, the ends of each positive stiffness support bar 310 near the pressure seat 100 are connected to form a second integrated portion, and the second integrated portion is connected to the second connecting portion 221.

[0191] By raising the connection interface between the bottom support 220 and the rib assembly 300 from the base surface of the bottom support 220 to a dedicated second connection 221, it is possible to independently optimize the material and geometric properties of the connection area.

[0192] In the rib assembly 300, multiple support bars 310 of various positive stiffness are connected at one end near the bearing seat 100 to form a second integrated part, which is connected to the second connecting part 221.

[0193] This second integrated unit can bear and distribute the load as a whole; and it also helps to simplify the structure and manufacturing process and reduce the number of parts.

[0194] In practice, the force flow path is: each positive stiffness support bar 310, the second integrated part, the second connecting part 221, and the bottom support member 220.

[0195] For example, the second connection 221 may be a raised platform, rib or reinforcing block.

[0196] Specifically, in the stiffener group 300, the junctions of each positive stiffness support bar 310 and the junctions of the second integrated part and the second connecting part 221 can also be provided with a smooth curve transition structure to reduce the stress level at the junctions of the positive stiffness support bars 310 and the junctions of the second integrated part and the second connecting part 221, thereby reducing fracture and increasing service life.

[0197] Combination Figure 1 and Figure 5 As shown, in some embodiments, the top support 210 includes a plurality of negative stiffness support bars 211; the plurality of negative stiffness support bars 211 are parallel and spaced apart along the first direction Z.

[0198] Understandably, solid slabs or thick-walled structures are prone to plastic hinges after compressive buckling, leading to permanent deformation. By configuring the top support 210 as composed of multiple negative stiffness support bars 211, not only can the load-bearing capacity be enhanced, but elastic buckling can also be facilitated, avoiding irreversible plastic deformation caused by compression, so that it can return to its original shape after unloading.

[0199] Combination Figure 6 As shown, multiple negative stiffness support bars 211 are arranged along the first direction Z. When subjected to pressure along the first direction Z, they can buckle simultaneously. Their mechanical behavior has high consistency and predictability, and can provide stable and coordinated negative stiffness output.

[0200] The multiple negative stiffness support bars 211 are arranged at intervals, which ensures that each negative stiffness support bar 211 has an independent and clear deformation space and load transfer path, avoiding interference and thus avoiding the generation of unexpected additional stress or wear.

[0201] Specifically, the spacing between two adjacent negative stiffness support bars 211 can be flexibly set according to the space requirements and manufacturability of the vibration isolator, and this application embodiment does not impose any restrictions.

[0202] More specifically, the number of negative stiffness support bars 211 can be flexibly set according to the needs of the spatial layout under load conditions.

[0203] Combination Figure 7 As shown, in some embodiments, the negative stiffness support bar 211 is a straight support bar;

[0204] Understandably, linear structures are relatively simple geometric shapes, and are easy to achieve and have low processing costs, whether through machining, extrusion molding or additive manufacturing.

[0205] Combination Figure 1 , Figure 5 and Figure 8 As shown, in some embodiments, the negative stiffness support bar 211 is an arc-shaped support bar with the concave side of the arc-shaped support bar facing the bottom support member 220.

[0206] Understandably, along the first direction Z, the initial stiffness of the arc-shaped structure is low, which allows it to begin buckling deformation under a smaller load and makes it easier to match with the positive stiffness support bar 310 to achieve quasi-zero stiffness.

[0207] The concave side of the arc-shaped support bar faces the bottom support 220, which helps guide the negative stiffness support bar 211 to buckle in a more controllable and smoother manner, avoiding the uncertainty of direction when the straight bar buckles, thereby providing a more stable and smoother negative stiffness output.

[0208] Furthermore, the arc-shaped negative stiffness support bar 211 can reserve more space for buckling deformation, allowing for a larger amount of deformation than a straight support bar with the same projected height, thus widening the negative stiffness zone of the vibration isolator.

[0209] Combination Figure 5 As shown, in some embodiments, a third transition portion 2111 is provided at the junction of the negative stiffness support bar 211 and the intermediate rib 110.

[0210] By providing a third transition section 2111 at the junction of the negative stiffness support bar 211 and the intermediate rib 110, the third transition section 2111 can reduce the stress level at the angle between the negative stiffness support bar 211 and the intermediate rib 110 during compression, which helps to reduce fracture and improve service life.

[0211] Specifically, the third transition section 2111 is a structure with a chamfer, fillet or other smooth curve transition provided at the junction of the negative stiffness support bar 211 and the intermediate rib 110.

[0212] The third transition section 2111 provides a smooth force flow channel, which can significantly reduce the stress concentration coefficient in the junction area between the negative stiffness support bar 211 and the intermediate rib 110, and distribute the stress more evenly over a larger area, thereby improving the fatigue resistance and structural durability of the vibration isolator under long-term high-frequency vibration loads.

[0213] Combination Figure 1 As shown, in some embodiments, the support frame 200 further includes a side support member 230, which is connected to the top support member 210 and the bottom support member 220; the top support member 210, the side support member 230 and the bottom support member 220 are arranged to form an accommodating area 201, and the rib group 300 is disposed within the accommodating area 201.

[0214] By setting the side support member 230, the support frame 200 can form a closed and complete rigid frame structure, which enhances the rigidity and stability of the support frame 200 and prevents the entire structure from twisting or becoming unstable.

[0215] The stiffener assembly 300 is disposed within the receiving area 201 of the support frame 200. The side support member 230 can provide certain lateral constraints and guidance for the movement of the stiffener assembly 300, preventing it from deviating from the design direction. At the same time, the closed support frame 200 also helps to provide physical protection for the stiffener assembly 300.

[0216] In some embodiments, the extension direction of the side support 230 and the extension direction of the bottom support 220 are at an angle θ, wherein the angle θ is greater than or equal to 80° and less than or equal to 90°.

[0217] By controlling the range of the angle θ between the extending direction of the side support 230 and the extending direction of the bottom support 220, the side support 230 is made to be nearly vertical. When the vertical load from the top is transmitted to the bottom through the side support 230, the force flow direction is basically consistent with the extending direction of the side support 230, ensuring efficient force flow transmission characteristics.

[0218] Meanwhile, the range of the included angle θ also helps to make the receiving area 201, which is surrounded by the top support 210, the side support 230 and the bottom support 220, a regular area with sufficient operating space from top to bottom, which facilitates the arrangement and installation of the rib assembly 300 and can provide interference-free space for the large deformation of the rib assembly 300.

[0219] In addition, the side support 230 is slightly tilted toward the receiving area 201, which helps to accommodate the bending deformation of the top support 210 and avoids excessive stretching of the top support 210 and the side support 230 when the top support 210 deforms.

[0220] Combination Figure 1 and Figure 5 As shown, in some embodiments, a fourth transition portion 2101 is provided at the junction of the surface of the top support 210 facing the pressure seat 100 and the surface of the side support 230 away from the receiving area 201.

[0221] Understandably, the junction between the surface of the top support 210 facing the bearing seat 100 and the surface of the side support 230 facing away from the receiving area 201 is the outer apex corner of the support frame 200, which is a high-stress area when the support frame 200 is under load. The fourth transition section 2101 can eliminate sharp corners and smooth force flow to reduce peak stress at this location, thereby reducing the risk of fatigue crack initiation and improving overall service life.

[0222] Combination Figure 6 As shown, the fourth transition section 2101 can be configured with a rounded corner facing the bottom support 220, which effectively avoids and expands the compression space below the pressure seat 100, ensuring that the pressure seat 100 does not structurally interfere with the fourth transition section 2101 when it moves downward, so that the vibration isolator can achieve the complete design stroke.

[0223] For example, the fourth transition section 2101 may also be a structure with a chamfer or other smooth curve transition.

[0224] In some embodiments, a fifth transition portion 2102 is provided at the junction of the surface of the top support 210 away from the pressure seat 100 and the surface of the side support 230 facing the receiving area 201.

[0225] By providing a fifth transition portion 2102 at the junction of the surface of the top support 210 away from the pressure seat 100 and the surface of the side support 230 facing the receiving area 201, the fifth transition portion 2102 has the function of reducing the stress level at this location during compression, which helps to reduce fracture and improve service life.

[0226] Specifically, the fifth transition section 2102 is a structure provided at the junction of the surface of the top support 210 away from the pressure seat 100 and the surface of the side support 230 towards the receiving area 201, with a chamfer, rounded corner or other smooth curve transition.

[0227] The fifth transition section 2102 provides a smooth force flow channel, which can significantly reduce the stress concentration coefficient in the junction area between the top support 210 and the side support 230, and distribute the stress more evenly over a larger area, thereby improving the fatigue resistance and structural durability of the vibration isolator under long-term high-frequency vibration loads.

[0228] Furthermore, when the negative stiffness support bar 211, which is far from the bearing seat 100, is connected to the surface of the side support member 230 facing the receiving area 201, a fifth transition portion 2102 is also provided at the junction of the negative stiffness support bar 211 and the side support member 230. The fifth transition portion 2102 can avoid stress concentration at the junction of the negative stiffness support bar 211 and the side support member 230.

[0229] In some embodiments, the cross-section of the vibration isolation unit 10 is symmetrical in the plane containing the first direction Z and the second direction Y. The axis of symmetry of the vibration isolation unit 10 coincides with the extension line of the intermediate rib 110 and is parallel to the first direction Z.

[0230] It is understandable that if the axis of symmetry of the vibration isolation unit 10 is consistent with the load direction, then in the plane perpendicular to the first direction Z, the stiffness characteristics of the vibration isolation unit 10 in each radial direction are the same or highly similar. This ensures that the pressure center of the bearing seat 100, the stiffness center of the vibration isolation unit 10, and the geometric center coincide, thereby avoiding harmful additional bending moments caused by eccentric loading, ensuring that the vibration isolator always moves smoothly along the design direction, and extending its service life.

[0231] Combination Figure 1 As shown, in some embodiments, the vibration isolation unit 10 is an integral structure.

[0232] Understandably, the vibration isolation unit 10 can be manufactured in one piece from a single material through additive manufacturing (such as 3D printing), precision casting, integral cutting or mold forming, etc., without internal assembly interfaces and connecting parts.

[0233] This one-piece molding method avoids the risks of interface failures such as thread loosening, weld fatigue, and adhesive aging associated with screw connections, welding, and bonding. Force flow is transmitted within a single, continuous material, improving structural integrity, stiffness, and stability.

[0234] Furthermore, since there are no stress concentration sources such as connecting holes and welds, the force flow can be transmitted more smoothly and continuously, significantly improving the fatigue life and reliability of the vibration isolation unit 10 under cyclic loads.

[0235] In some embodiments, the vibration isolation unit 10 is made of one of the following materials: metal, composite material, and polymer material.

[0236] It should be noted that metal parts are structural or functional components made primarily of metallic elements (such as iron, copper, and titanium) or metal alloys (such as titanium alloys), and typically possess high strength.

[0237] Polymer materials (such as plastics, rubber, or fibers) are materials composed of large molecular compounds formed by a large number of repeating small molecules linked by chemical bonds. They are also called polymer materials and are usually lightweight and easy to process.

[0238] Composite materials are made by combining two or more materials with different properties (such as metals, ceramics, polymers, etc.) through physical or chemical means. They are usually lightweight, high-strength, and highly designable, and the performance of composite materials is superior to that of single materials.

[0239] Specifically, the vibration isolation unit 10 can be a metal component.

[0240] Understandably, metallic materials (such as high-strength steel and titanium alloys) typically possess high yield strength and elastic modulus. Vibration isolation units 10 made of metallic materials can withstand large loads without easily undergoing plastic deformation or failure.

[0241] It should be noted that the vibration isolation unit 10 can be made of materials such as metal, 3D printing materials, and high-strength elastic materials. In particular, metal materials with high yield strength (above 700MPa) and high elastic modulus (above 70GPa) are suitable for high load-bearing pressure restraint requirements of macrostructures and microstructures.

[0242] In practice, vibration isolation units 10 made of different materials can be used to adapt to different load-bearing scenarios.

[0243] Combination Figure 6 and Figure 9 As shown, for example, the vibration isolation unit 10 is made of 40Cr high-strength spring steel (elastic modulus 210GPa, yield strength 100MPa).

[0244] With a fixed constraint applied to the bottom support 220 and a 9mm displacement applied at the bearing seat 100 along the first direction Z, the deformation of the vibration isolation unit 10 is as follows. Figure 6 As shown, the pressure-displacement curve obtained after loading is as follows: Figure 9 As shown, it can be seen that the vibration isolation unit 10 can achieve near-zero stiffness characteristics with a high pressure of close to 10MPa.

[0245] Combination Figure 6 and 10 As shown, for example, the vibration isolation unit 10 is made of titanium alloy.

[0246] With a fixed constraint applied to the bottom support 220 and a 9mm displacement applied at the bearing seat 100 along the first direction Z, the deformation of the vibration isolation unit 10 is as follows. Figure 6 As shown, the pressure-displacement curve obtained after loading is as follows: Figure 10 As shown, it can be seen that the vibration isolation unit 10 can achieve a near-zero stiffness characteristic under high pressure of about 7MPa.

[0247] Combination Figure 1 and Figure 2 As shown, in some embodiments, along the first direction Z, the ratio of the height f of the first connecting segment 311 to the height c of the positive stiffness support bar 310 is greater than or equal to 0.002 and less than or equal to 0.4. Along the first direction Z, the ratio of the height e of the third connecting segment 3122 to the height c of the positive stiffness support bar 310 is greater than or equal to 0.004 and less than or equal to 0.8.

[0248] Understandably, by controlling the ratio of the total height of the first connecting segment 311 to the total height of the positive stiffness support bar 310, and by controlling the ratio of the total height of the third connecting segment 3122 to the total height of the positive stiffness support bar 310, the bending of the positive stiffness support bar 310 can be easily controlled.

[0249] With this configuration, the bending segment 312 can have sufficient height to undergo elastic deformation, thereby achieving the synergistic effect of positive and negative stiffness and ultimately obtaining quasi-zero stiffness.

[0250] In some embodiments, along the second direction Y, the ratio of the width d of the positive stiffness support bar 310 to the width a of the vibration isolation unit 10 is greater than or equal to 0.06 and less than 0.5.

[0251] Understandably, the aforementioned ratio controls the lateral dimension of the positive stiffness support bar 310 in the second direction Y. A sufficiently wide positive stiffness support bar 310 can provide stable positive stiffness and support force; and the width d of the positive stiffness support bar 310 will not be too wide, which can prevent it from occupying too much space in the accommodating area 201, affecting its own deformation, or affecting the arrangement of the negative stiffness structure.

[0252] In some embodiments, along the first direction Z, the ratio of the height c of the positive stiffness support bar 310 to the height b of the vibration isolation unit 10 is greater than or equal to 0.05 and less than 1.

[0253] Understandably, the aforementioned ratio controls the dimensions of the positive stiffness support bar 310 in the first direction Z. A positive stiffness support bar 310 of appropriate height can ensure basic load-bearing capacity and positive stiffness; it also provides the necessary space for the deformation of the negative stiffness support bar 211.

[0254] In some embodiments, along the second direction Y, the ratio of the thickness h of the positive stiffness support bar 310 to the width a of the vibration isolation unit 10 is greater than or equal to 0.001 and less than or equal to 0.1.

[0255] Understandably, the above ratio controls the thickness h of the positive stiffness support bar 310, which can ensure that the positive stiffness support bar 310 provides the required stiffness while having good flexibility to adapt to deformation, and avoids processing difficulties or material waste due to excessive thickness, or affecting the structural strength and stability due to excessive thinness.

[0256] In some embodiments, along the first direction Z, the ratio of the thickness g of the negative stiffness support bar 211 to the height b of the vibration isolation unit 10 is greater than or equal to 0.001 and less than or equal to 0.1.

[0257] Understandably, the aforementioned ratio controls the dimensions of the negative stiffness support bar 211 in the primary deformation direction. Its thickness within this range allows it to undergo the expected elastic buckling or large deformation under external loads, generating a negative stiffness effect while maintaining structural integrity and recoverability, preventing plastic deformation or fracture.

[0258] In some embodiments, the ratio of the height b of the vibration isolation unit 10 along the first direction Z to the width a of the vibration isolation unit 10 along the second direction Y is greater than or equal to 0.2 and less than or equal to 5.

[0259] By controlling the aspect ratio of the vibration isolation unit 10, the overall shape of the vibration isolation unit 10 can be controlled. This setting helps to ensure that the vibration isolation unit 10 has a reasonable geometric configuration in the main load-bearing and deformation directions, avoiding both excessive flatness which may affect stability or negative stiffness behavior, and excessive slenderness which may generate unnecessary bending modes or reduce load-bearing capacity, so as to maintain the expected quasi-zero stiffness characteristics.

[0260] Specifically, by controlling the relative dimensions of each part of the vibration isolation unit 10, the negative stiffness effect and the positive stiffness effect can be effectively canceled out, thereby enabling the vibration isolation unit 10 to obtain extremely low dynamic stiffness (quasi-zero stiffness characteristics) near the equilibrium position, significantly widening its low-frequency vibration isolation bandwidth.

[0261] It should be noted that the dimensions of the vibration isolation unit 10 in the vibration isolator can be flexibly adjusted. Through the adjustable proportional relationship, the vibration isolator has a high degree of flexibility and scalability.

[0262] In practice, simulation analysis can be used to optimize and flexibly adjust the specific dimensions to adapt to vibration isolation, energy absorption, and acoustic control applications of different scales, from small spaces to large equipment.

[0263] For example, the width a of the vibration isolation unit 10 along the second direction Y can be in the range of 20mm to 100mm; the height b of the vibration isolation unit 10 along the first direction Z can be in the range of 20mm to 100mm.

[0264] The thickness g of the negative stiffness support bar 211 along the first direction Z can range from 0.1 mm to 2 mm;

[0265] The height c of the positive stiffness support bar 310 along the first direction Z can be in the range of 5mm to 50mm, and does not exceed the height b of the vibration isolation unit 10 along the first direction Z;

[0266] The width d of the positive stiffness support bar 310 along the second direction Y can be in the range of 6mm to 50mm, and the width d of the positive stiffness support bar 310 does not exceed half of the width a of the vibration isolation unit 10 along the second direction Y.

[0267] The thickness h of the positive stiffness support bar 310 along the second direction Y can range from 0.1 mm to 2 mm;

[0268] The height f of the first connecting segment 311 along the first direction Z can range from 0.1mm to 2mm;

[0269] The height e of the third connecting segment 3122 along the first direction Z can range from 0.2mm to 4mm.

[0270] In some embodiments, along the thickness direction (i.e., the third direction X) of the vibration isolation unit 10, the thickness of the vibration isolation unit 10 is greater than or equal to 1 mm and less than or equal to 1000 mm.

[0271] Understandably, the vibration isolation unit 10 is within this thickness range, enabling it to cover vibration reduction applications of various scales, from micro-precision devices to large industrial equipment, demonstrating the scalability of the design.

[0272] Combination Figure 3 As shown, another aspect of this application provides a vibration isolator, including at least one vibration isolation unit 10 provided in any of the above embodiments; a plurality of vibration isolation units 10 are arrayed in a plane perpendicular to the thickness direction of the vibration isolation unit 10.

[0273] Understandably, the regularly arranged vibration isolation units 10 make it easy for the stiffness and center of mass of the entire vibration isolator to coincide, thereby ensuring that the load can be evenly transferred to each vibration isolation unit 10, avoiding the generation of overturning moment and ensuring the stability of the support.

[0274] Furthermore, array distribution is the layout method with the highest space utilization and the most balanced mechanical performance. It helps to make the structure of the entire vibration isolator compact and can provide uniform and isotropic overall stiffness, which is convenient for installation and layout.

[0275] It should be noted that the vibration isolator provided in this application embodiment can achieve multi-level load-bearing capacity by adjusting the number of vibration isolation units 10 arranged.

[0276] In some embodiments, in the first direction Z, in two adjacent vibration isolation units 10, the support frame 200 of one vibration isolation unit 10 is connected to the bearing seat 100 of the other vibration isolation unit 10.

[0277] Specifically, in two adjacent vibration isolation units 10, the bottom support 220 of one vibration isolation unit 10 is connected to the pressure seat 100 of the other vibration isolation unit 10.

[0278] In the first direction Z, the vibration isolation units 10 are connected in series, which enables flexible adjustment of the static stiffness of the vibration isolator and expansion of the installation height.

[0279] In some embodiments, in the second direction Y, the bearing seats 100 of two adjacent vibration isolation units 10 are connected, and the support frames 200 of two adjacent vibration isolation units 10 are connected.

[0280] Specifically, the bottom support members 220 of two adjacent vibration isolation units 10 are connected.

[0281] In the second direction Y, the vibration isolation units 10 are connected in parallel, which allows multiple discrete vibration isolation units 10 to be tightly integrated into a whole system with a unified load platform and a unified rigid foundation.

[0282] Specifically, the above-mentioned interconnected method not only helps to achieve linear growth in load-bearing capacity, but also helps to ensure the consistency of mechanical performance, motion coordination and overall stability of the expanded vibration isolator, so that multiple vibration isolation units 10 can work like a single unit with amplified performance.

[0283] Finally, it should be noted that those skilled in the art, upon considering the specification and practicing the application disclosed herein, will readily conceive of other embodiments of the present application. The embodiments of this application are intended to cover any variations, uses, or adaptations of the embodiments of this application that follow the general principles of the embodiments of this application and include common knowledge or customary technical means in the art not disclosed in the embodiments of this application. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of the embodiments of this application are indicated by the following claims.

[0284] It should be understood that the embodiments of this application are not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from their scope. The scope of the embodiments of this application is limited only by the appended claims.

Claims

1. A vibration isolation unit, characterized in that, Includes a pressure-bearing seat (100) and a support frame (200); The pressure-bearing seat (100) is connected to at least one side of the support frame (200); The support frame (200) is provided with a plurality of rib groups (300). The plurality of rib groups (300) are arranged at intervals in a direction perpendicular to the bearing seat (100) and the support frame (200). The end of the rib group (300) close to the bearing seat (100) is connected to the bearing seat (100), and the end of the rib group (300) away from the bearing seat (100) is connected to the support frame (200).

2. The vibration isolation unit according to claim 1, characterized in that, The rib group (300) includes multiple positive stiffness support bars (310). The end of the positive stiffness support bar (310) close to the pressure seat (100) is connected to the pressure seat (100), and the end of the positive stiffness support bar (310) away from the pressure seat (100) is connected to the support frame (200). In the rib group (300), multiple positive stiffness support bars (310) are arranged in a direction perpendicular to the bearing seat (100) and the support frame (200).

3. The vibration isolation unit according to claim 2, characterized in that, The bearing seat (100) has an intermediate rib (110) on the side facing the support frame (200); the intermediate rib (110) is connected to the support frame (200), and part of the intermediate rib (110) extends into the support frame (200); the positive stiffness support bar (310) is connected to the intermediate rib (110) at one end near the bearing seat (100).

4. The vibration isolation unit according to claim 3, characterized in that, The plurality of said rib groups (300) include a first rib group (301) and a second rib group (302), wherein the first rib group (301) and the second rib group (302) are symmetrically arranged with respect to the extension line of the intermediate rib (110); The positive stiffness support bar (310) includes a first connecting segment (311), a bending segment (312), and a second connecting segment (313) connected in sequence. The end of the first connecting segment (311) facing away from the bending segment (312) is connected to the intermediate rib (110), and the end of the second connecting segment (313) facing away from the bending segment (312) is connected to the support frame (200). The first connecting segment (311), the bending segment (312), and the second connecting segment (313) form a bending structure, and in the first rib group (301), the concave side of the bending structure faces the second rib group (302); The bending segment (312) includes a first sub-bending segment (3121), a third connecting segment (3122), and a second sub-bending segment (3123); One end of the third connecting segment (3122) is tangentially connected to and connected to the first sub-bending segment (3121), and the other end of the third connecting segment (3122) is tangentially connected to and connected to the second sub-bending segment (3123). The end of the first sub-bending segment (3121) facing away from the third connecting segment (3122) is tangential to and connected to the first connecting segment (311); The end of the second sub-bending segment (3123) opposite to the third connecting segment (3122) is tangential to and connected to the second connecting segment (313).

5. The vibration isolation unit according to claim 4, characterized in that, Along the direction opposite to the bearing seat (100) and the support frame (200), in the first rib group (301), the height of the third connecting segment (3122) near the second rib group (302) is less than or equal to the height of the third connecting segment (3122) away from the second rib group (302); And / or, in a direction perpendicular to the bearing seat (100) and the support frame (200), in the first rib group (301), the width of the positive stiffness support strip (310) near the second rib group (302) is less than or equal to the width of the positive stiffness support strip (310) away from the second rib group (302); And / or, along the direction opposite to the bearing seat (100) and the support frame (200), the ratio of the height of the first connecting segment (311) to the height of the positive stiffness support bar (310) is greater than or equal to 0.002 and less than or equal to 0.

4. And / or, along the direction opposite to the bearing seat (100) and the support frame (200), the ratio of the height of the third connecting section (3122) to the height of the positive stiffness support bar (310) is greater than or equal to 0.004 and less than or equal to 0.

8. And / or, along a direction perpendicular to the bearing seat (100) and the support frame (200), the ratio of the width of the positive stiffness support bar (310) to the width of the vibration isolation unit (10) is greater than or equal to 0.06 and less than 0.

5. And / or, along the direction opposite to the bearing seat (100) and the support frame (200), the ratio of the height of the positive stiffness support bar (310) to the height of the vibration isolation unit (10) is greater than or equal to 0.05 and less than 1; And / or, along a direction perpendicular to the bearing seat (100) and the support frame (200), the ratio of the thickness of the positive stiffness support bar (310) to the width of the vibration isolation unit (10) is greater than or equal to 0.001 and less than or equal to 0.

1.

6. The vibration isolation unit according to any one of claims 3-5, characterized in that, The intermediate rib (110) is provided with a first connecting part (111) at one end inside the support frame (200), and the first connecting part (111) is connected to the end of the positive stiffness support bar (310) near the pressure seat (100); The first connecting portion (111) extends in a direction perpendicular to the bearing seat (100) and the support frame (200); in the rib group (300), the end of each positive stiffness support bar (310) near the bearing seat (100) is connected to the surface of the first connecting portion (111) away from the bearing seat (100); a first transition portion (3101) is provided at the junction of the positive stiffness support bar (310) and the first connecting portion (111); Alternatively, the first connecting portion (111) extends in the opposite direction of the bearing seat (100) and the support frame (200); in the rib group (300), each of the positive stiffness support bars (310) is connected to one end near the bearing seat (100) to form a first integrated portion, which is connected to the first connecting portion (111).

7. The vibration isolation unit according to any one of claims 3-5, characterized in that, The support frame (200) includes a top support member (210) and a bottom support member (220) spaced apart along the direction opposite to the bearing seat (100) and the support frame (200); the top support member (210) is connected to the intermediate rib (110), and the bottom support member (220) is connected to the end of the positive stiffness support bar (310) away from the bearing seat (100); In the rib group (300), the end of each positive stiffness support bar (310) facing away from the pressure seat (100) is connected to the surface of the bottom support member (220) facing the pressure seat (100); a second transition part (3102) is provided at the junction of the positive stiffness support bar (310) and the bottom support member (220); Alternatively, the bottom support (220) is provided with a second connecting portion (221) on the surface facing the pressure seat (100), the second connecting portion (221) extending in the opposite direction of the pressure seat (100) and the support frame (200); in the rib group (300), each of the positive stiffness support bars (310) is connected to one end near the pressure seat (100) to form a second integrated portion, the second integrated portion being connected to the second connecting portion (221).

8. The vibration isolation unit according to claim 7, characterized in that, The support frame (200) further includes a side support (230) that connects the top support (210) and the bottom support (220); The top support (210), the side support (230) and the bottom support (220) are arranged to form a receiving area (201), and the rib group (300) is disposed within the receiving area (201); A fourth transition portion (2101) is provided at the junction of the surface of the top support (210) facing the pressure seat (100) and the surface of the side support (230) away from the receiving area (201); A fifth transition portion (2102) is provided at the junction of the surface of the top support (210) away from the pressure seat (100) and the surface of the side support (230) facing the receiving area (201); And / or, the extension direction of the side support (230) and the extension direction of the bottom support (220) are at an angle greater than or equal to 80° and less than or equal to 90°.

9. The vibration isolation unit according to claim 7, characterized in that, The top support (210) includes multiple negative stiffness support bars (211); Multiple negative stiffness support bars (211) are arranged parallel to each other and spaced apart along the opposite direction of the bearing seat (100) and the support frame (200).

10. The vibration isolation unit according to claim 9, characterized in that, The negative stiffness support bar (211) is a straight support bar, or the negative stiffness support bar (211) is an arc-shaped support bar, with the concave side of the arc-shaped support bar facing the bottom support member (220); And / or, a third transition portion (2111) is provided at the junction of the negative stiffness support bar (211) and the intermediate rib (110); And / or, along the direction opposite to the bearing seat (100) and the support frame (200), the ratio of the thickness of the negative stiffness support bar (211) to the height of the vibration isolation unit (10) is greater than or equal to 0.001 and less than or equal to 0.

1.

11. The vibration isolation unit according to any one of claims 1-5, characterized in that, Along the thickness direction of the vibration isolation unit, the thickness of the vibration isolation unit is greater than or equal to 1 mm and less than or equal to 1000 mm; And / or, the ratio of the height of the vibration isolation unit (10) along the direction opposite to the bearing seat (100) and the support frame (200) to the width of the vibration isolation unit (10) along the direction perpendicular to the direction opposite to the bearing seat (100) and the support frame (200) is greater than or equal to 0.2 and less than or equal to 5; And / or, the vibration isolation unit (10) is an integral structure; And / or, the vibration isolation unit (10) is made of one of the following materials: metal, composite material and polymer material; And / or, the bearing seat (100) is provided with an intermediate rib (110) on the side facing the support frame (200), and the intermediate rib (110) is connected to the support frame (200); the vibration isolation unit (10) is a symmetrical structure, and the axis of symmetry of the vibration isolation unit (10) coincides with the extension line of the intermediate rib (110).

12. A vibration isolator, characterized in that, Includes at least one vibration isolation unit (10) as described in any one of claims 1-11; In a plane perpendicular to the thickness direction of the vibration isolation unit (10), a plurality of vibration isolation units (10) are arrayed. In the direction opposite to the bearing seat (100) and the support frame (200), in two adjacent vibration isolation units (10), the support frame (200) of one vibration isolation unit (10) is connected to the bearing seat (100) of the other vibration isolation unit (10); And / or, in a direction perpendicular to the bearing seat (100) and the support frame (200), the bearing seats (100) of two adjacent vibration isolation units (10) are connected, and the support frames (200) of two adjacent vibration isolation units (10) are connected.

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