Adaptive quasi-zero stiffness foot mat, compressor and refrigeration and heating equipment

Abstract

The application provides an adaptive quasi-zero stiffness foot pad, a compressor and a refrigeration and heating equipment. The adaptive quasi-zero stiffness foot pad comprises a base, a shaft core, an end cover, a magnetic attraction damping mechanism and a magnetic repulsion damping mechanism. The magnetic attraction damping mechanism comprises a permanent magnet inner ring and a permanent magnet outer ring, and the permanent magnet outer ring is arranged around the permanent magnet inner ring. The magnetic repulsion damping mechanism comprises an inner magnetic ring and an outer magnetic ring for generating a magnetic repulsion force on the inner magnetic ring in the direction of the shaft core, and the outer magnetic ring is arranged around the inner magnetic ring. The adaptive quasi-zero stiffness foot pad of the application sets the permanent magnet outer ring around the permanent magnet inner ring to form an adaptive magnetic force type negative feedback structure and form axial quasi-zero stiffness damping. The outer magnetic ring is arranged around the inner magnetic ring, and the outer magnetic ring generates a radial magnetic repulsion force on the inner magnetic ring, which makes the inner magnetic ring drive the shaft core to tend to the radial center to slow down the radial vibration of the shaft core and form radial quasi-zero stiffness damping. Therefore, the adaptive quasi-zero stiffness foot pad realizes good axial and radial damping and has good damping effect.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of compressors, and more particularly relates to a self-adaptive quasi-zero stiffness foot pad, a compressor and a refrigeration and heating device. BACKGROUND

[0002] In the related art, a motor and a compression mechanism are installed in a casing of a compressor, the motor drives the compression mechanism to run to compress gas. A bottom foot is arranged at the bottom of the casing to be connected with a mounting seat of a household appliance, so as to support the compressor on the mounting seat. When the compressor is running, the running of the motor and the compression mechanism will generate vibration, which will be conducted to the mounting seat through the casing and the bottom plate, resulting in relatively large noise and vibration, and even causing the risk of resonance.

[0003] In order to attenuate the vibration energy generated by the compressor, the existing vibration reduction structure of the compressor mainly consists of a rubber foot pad, a sleeve and a bolt. The installation mode is that the bottom foot of the compressor is embedded into the corresponding groove of the rubber foot pad, the bolt of the compressor passes through the sleeve to fix the rubber foot pad on the mounting seat. The bolt is in contact with the top of the rubber foot pad, and the bottom foot of the compressor is embedded in the corresponding groove of the rubber foot pad, so as to realize axial weak constraint and then realize axial vibration energy attenuation.

[0004] The current vibration reduction structure can only reduce vibration in the axial direction, but when the compressor is working, there is often also radial vibration, and the radial vibration will also be conducted to the mounting seat, resulting in relatively large noise and vibration. SUMMARY

[0005] The purpose of the embodiment of the application is to provide a self-adaptive quasi-zero stiffness foot pad, a compressor and a refrigeration and heating device, so as to solve the problem that the foot pad of the compressor in the prior art can only reduce vibration in the axial direction, but when the compressor is working, there is often also radial vibration, and the radial vibration will also be conducted to the mounting seat, resulting in relatively large noise and vibration.

[0006] To achieve the above object, the technical scheme adopted by the embodiment of the present application is as follows: a self-adaptive quasi-zero stiffness foot pad is provided, which comprises a base with an inner cavity with one end being open, a shaft core with one end extending into the inner cavity through the opening, an end cover covering the opening, a magnetic attraction damping mechanism, and a magnetic repulsion damping mechanism, a through hole is formed in the end cover for the other end of the shaft core to extend out, and a vibration gap for radial vibration of the shaft core is formed between the inner wall of the through hole and the shaft core; the magnetic attraction damping mechanism comprises a permanent magnet inner ring and a permanent magnet outer ring for magnetically attracting the outer peripheral side of the permanent magnet inner ring, the permanent magnet outer ring is arranged around the permanent magnet inner ring, and the permanent magnet inner ring is mounted on the shaft core; the magnetic repulsion damping mechanism comprises an inner magnetic ring mounted on the shaft core and an outer magnetic ring for generating magnetic repulsive force on the inner magnetic ring in the direction of the shaft core, the outer magnetic ring is arranged around the inner magnetic ring, the inner magnetic ring and the outer magnetic ring are coaxially arranged, and the outer magnetic ring is fixed on the base.

[0007] In an optional embodiment, the magnetic repulsion damping mechanism is in multiple groups, and the multiple groups of the magnetic repulsion damping mechanism are arranged at intervals along the axial direction of the shaft core.

[0008] In an optional embodiment, the distance between the inner magnetic ring and the outer magnetic ring of any two groups of the magnetic repulsion damping mechanism is not equal.

[0009] In an optional embodiment, the magnetic attraction damping mechanism is in multiple groups, and the multiple groups of the magnetic attraction damping mechanism are arranged at intervals along the axial direction of the shaft core.

[0010] In an optional embodiment, the magnetic attraction damping mechanism is provided with the magnetic repulsion damping mechanism at both ends in the axial direction of the shaft core.

[0011] In an optional embodiment, the distance between the inner magnetic ring and the corresponding outer magnetic ring is not equal to the distance between the permanent magnet inner ring and the corresponding permanent magnet outer ring.

[0012] In an optional embodiment, the inner magnetic ring and the outer magnetic ring are both radially magnetized, and the magnetization directions of the inner magnetic ring and the outer magnetic ring are opposite.

[0013] In an optional embodiment, when the shaft core vibrates in the axial direction, the radial projection of one of the inner magnetic ring and the outer magnetic ring on the shaft core always covers the radial projection of the other on the shaft core.

[0014] In an optional embodiment, the permanent magnet inner ring and the permanent magnet outer ring are both radially magnetized, and the magnetization directions of the permanent magnet inner ring and the permanent magnet outer ring are the same.

[0015] In an optional embodiment, the outer magnetic ring comprises a plurality of first magnets arranged in a ring array, and the inner magnetic ring comprises a plurality of second magnets arranged in a ring array; or the outer magnetic ring comprises at least one first annular magnet arranged along the axial direction of the shaft core, and the inner magnetic ring comprises at least one second annular magnet arranged along the axial direction of the shaft core.

[0016] In an optional embodiment, the outer permanent magnetic ring comprises a plurality of first magnetic bodies arranged in a ring array, and the inner permanent magnetic ring comprises a plurality of second magnetic bodies arranged in a ring array; or the outer permanent magnetic ring comprises at least one first magnetic annular body arranged along the axial direction of the shaft core, and the inner permanent magnetic ring comprises at least one second magnetic annular body arranged along the axial direction of the shaft core.

[0017] In an optional embodiment, a blind hole is formed in the bottom surface of the inner cavity, one end of the shaft core extends into the blind hole, and a limiting gap for radial vibration of the shaft core is formed between the inner wall of the blind hole and the shaft core.

[0018] In an optional embodiment, a stepped groove for positioning and supporting the outer magnetic ring and the outer permanent magnetic ring is formed in the side wall of the inner cavity.

[0019] In an optional embodiment, a connecting shaft is protruded from the end away from the end cover, and the connecting shaft is coaxially arranged with the shaft core.

[0020] In an optional embodiment, a positioning structure is arranged on the shaft core to position and fix the inner magnetic ring and the inner permanent magnetic ring on the shaft core, and the outer diameter of the positioning structure close to the end cover is greater than the inner diameter of the through hole.

[0021] Another purpose of the embodiments of the present application is to provide a compressor comprising a body, and the adaptive quasi-zero stiffness foot pad according to any one of the above embodiments is mounted on the body.

[0022] Still another purpose of the embodiments of the present application is to provide a refrigeration and heating equipment comprising the compressor according to any one of the above embodiments.

[0023] The adaptive quasi-zero stiffness foot pad provided by the embodiment of the application has the beneficial effects that, compared with the prior art, the adaptive quasi-zero stiffness foot pad of the embodiment of the application forms an adaptive magnetic force type negative feedback structure by arranging a permanent magnetic inner ring on the shaft core and arranging a permanent magnetic outer ring around the permanent magnetic inner ring, and when the axial middle surface of the permanent magnetic inner ring is near the axial middle surface of the permanent magnetic outer ring, the stiffness is very small and close to zero; when the shaft core is axially displaced due to vibration of the object to be isolated, the permanent magnetic inner ring and the permanent magnetic outer ring generate an adaptive magnetic force in the opposite direction of the displacement according to the size of the displacement, so that the permanent magnetic inner ring and the shaft core are always in an ideal equilibrium position with the stiffness close to zero in the axial direction, forming axial quasi-zero stiffness vibration reduction; meanwhile, the inner magnetic ring is arranged on the shaft core, the outer magnetic ring is arranged around the inner magnetic ring, and the radial magnetic repulsion force generated by the outer magnetic ring on the inner magnetic ring makes the inner magnetic ring drive the shaft core to tend to the radial center, so as to slow down the radial vibration of the shaft core; in addition, the magnetic attraction damping mechanism has very small stiffness close to zero at the beginning of the radial vibration, forming radial quasi-zero stiffness vibration reduction, and the radial magnetic repulsion force generated by the outer magnetic ring on the inner magnetic ring can make the inner magnetic ring and the shaft core always be in an ideal equilibrium position with the stiffness close to zero in the radial direction, forming radial quasi-zero stiffness vibration reduction, so that the adaptive quasi-zero stiffness foot pad realizes good vibration reduction in the axial and radial directions.

[0024] The compressor provided by the embodiment of the application has the beneficial effects that, compared with the prior art, the compressor of the embodiment of the application uses the adaptive quasi-zero stiffness foot pad of the above embodiment, has the technical effects of the adaptive quasi-zero stiffness foot pad, and has good radial and axial vibration reduction effects.

[0025] The refrigeration and heating equipment provided by the embodiment of the application has the beneficial effects that, compared with the prior art, the refrigeration and heating equipment of the embodiment of the application uses the compressor of the above embodiment, has the technical effects of the compressor, and details are not repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed to be used in the embodiments or exemplary technical descriptions will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative effort.

[0027] Figure 1 A cross-sectional structure schematic view of the adaptive quasi-zero stiffness foot pad provided for the first embodiment of the application;

[0028] Figure 2 A structure schematic view of the shaft core provided for the first embodiment of the application;

[0029] Figure 3 A structure schematic view of the base provided for the first embodiment of the application;

[0030] Figure 4 Structure schematic diagram of end cover provided for embodiment one of the present application;

[0031] Figure 5 Structure schematic diagram of magnetizing direction of inner magnetic ring and outer magnetic ring provided for embodiment one of the present application;

[0032] Figure 6 Structure schematic diagram of magnetizing direction of permanent magnetic outer ring and permanent magnetic inner ring provided for embodiment one of the present application;

[0033] Figure 7 Top view structure schematic diagram of inner magnetic ring and outer magnetic ring provided for embodiment two of the present application;

[0034] Figure 8 Structure schematic diagram of permanent magnetic outer ring provided for embodiment two of the present application;

[0035] Figure 9 Structure schematic diagram of permanent magnetic inner ring provided for embodiment two of the present application;

[0036] Figure 10 Sectional view structure schematic diagram of self-adaptive quasi-zero stiffness foot pad provided for embodiment three of the present application;

[0037] Figure 11 Sectional view structure schematic diagram of self-adaptive quasi-zero stiffness foot pad provided for embodiment four of the present application;

[0038] Figure 12 Sectional view structure schematic diagram of self-adaptive quasi-zero stiffness foot pad provided for embodiment five of the present application.

[0039] In the drawings, the main marks are:

[0040] 100 - self-adaptive quasi-zero stiffness foot pad;

[0041] 10 - shaft core; 11 - base; 12 - positioning structure;

[0042] 20 - base; 21 - inner cavity; 22 - stepped groove; 221 - first level stepped groove; 222 - second level stepped groove; 223 - third level stepped groove; 224 - fourth level stepped groove; 23 - blind hole; 231 - limiting gap; 24 - connecting shaft; 25 - positioning sleeve;

[0043] 30 - end cover; 31 - through hole; 311 - vibration gap; 32 - connecting ring;

[0044] 40 - magnetic attraction damping mechanism; 41 - permanent magnetic outer ring; 411 - first magnetic ring body; 412 - first magnetic body; 42 - permanent magnetic inner ring; 421 - second magnetic ring body; 422 - second magnetic body;

[0045] 50 - Magnetic repulsion damping mechanism; 51 - Outer magnetic ring; 511 - First annular magnet; 512 - First magnet; 52 - Inner magnetic ring; 521 - Second annular magnet; 522 - Second magnet. Detailed Implementation

[0046] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0047] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0048] In the description of this application, "a plurality of" means two or more, unless otherwise expressly specified. "Several" means one or more, unless otherwise expressly specified. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. The terms "center," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0049] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0050] Reference throughout this application to "one embodiment", "some embodiments" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. The appearances of the phrases "in one embodiment", "in some embodiments", "in other embodiments", "in additional embodiments" and so on, in various places in the specification are not necessarily all referring to the same embodiment, unless otherwise specifically specified. Furthermore, the particular features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0051] Referring to Figures 1 to 6 , Figure 1 A cross-sectional structural schematic view of the adaptive quasi-zero stiffness foot pad provided in the present embodiment is shown in FIG. 1. Figure 2 A structural schematic view of the shaft core provided in the present embodiment is shown in FIG. 2. Figure 3 A structural schematic view of the base provided in the present embodiment is shown in FIG. 3. Figure 4 A structural schematic view of the end cover provided in the present embodiment is shown in FIG. 4. Figure 5 A structural schematic view of the magnetizing direction of the inner magnetic ring and the outer magnetic ring provided in the present embodiment is shown in FIG. 5. Figure 6 A structural schematic view of the magnetizing direction of the permanent magnetic outer ring and the permanent magnetic inner ring provided in the present embodiment is shown in FIG. 6.

[0052] Referring to Figures 1 to 3 , the adaptive quasi-zero stiffness foot pad 100 provided in the present application will be described. The adaptive quasi-zero stiffness foot pad 100 comprises a base 20, a shaft core 10, a magnetic attraction damping mechanism 40, a magnetic repulsion damping mechanism 50 and an end cover 30. The base 20 is provided with an inner cavity 21, and one end of the inner cavity 21 is open, and one end of the shaft core 10 extends into the inner cavity 21, so that the shaft core 10 can move axially and radially in the inner cavity 21.

[0053] The end cover 30 is installed on the base 20, covers the inner cavity 21 through the end cover 30, and the end cover 30 is provided with a through hole 31, so that the other end of the shaft core 10 can extend out of the through hole 31 to be connected to the object to be isolated. The inner diameter of the through hole 31 is greater than the outer diameter of the shaft core 10, so that there is a vibration gap 311 between the side wall of the through hole 31 and the shaft core 10, so that the shaft core 10 can move radially. When the shaft core 10 supports the object to be isolated, the object to be isolated will cause the shaft core 10 to move radially in the through hole 31 when the object to be isolated vibrates radially.

[0054] The magnetic attraction damping mechanism 40 is used to slow down the axial vibration of the shaft core 10. The magnetic attraction damping mechanism 40 comprises a permanent magnetic inner ring 42 and a permanent magnetic outer ring 41, the permanent magnetic outer ring 41 is arranged around the permanent magnetic inner ring 42, the permanent magnetic inner ring 42 is installed on the shaft core 10, the permanent magnetic inner ring 42 is supported by the shaft core 10, the permanent magnetic outer ring 41 is installed in the inner cavity 21, the permanent magnetic outer ring 41 is accommodated by the inner cavity 21, and the permanent magnetic outer ring 41 is positioned to be installed in the base 20. The permanent magnetic outer ring 41 is arranged around the permanent magnetic inner ring 42, and then when the shaft core 10 moves along the inner cavity 21, the permanent magnetic inner ring 42 moves along the axial direction of the permanent magnetic outer ring 41.

[0055] The permanent magnetic outer ring 41 is arranged around the permanent magnetic inner ring 42, so that the permanent magnetic inner ring 42 cooperates with the permanent magnetic outer ring 41 to form a self-adaptive magnetic force type negative feedback structure. When the vibration of the object to be isolated generates axial displacement, the permanent magnetic outer ring 41 will generate a self-adaptive magnetic force opposite to the axial displacement to the permanent magnetic inner ring 42 according to the displacement size when the shaft core 10 and the permanent magnetic inner ring 42 are axially moved, so as to effectively reduce the vibration energy in time.

[0056] In addition, when the axial middle surface of the permanent magnetic inner ring 42 coincides with the axial middle surface of the permanent magnetic outer ring 41, that is, when the permanent magnetic inner ring 42 is located at the axial middle position of the permanent magnetic outer ring 41, the magnetic force of the permanent magnetic outer ring 41 on both ends of the permanent magnetic inner ring 42 is balanced. Near this balance point, the stiffness of the damping structure formed by the permanent magnetic inner ring 42 and the permanent magnetic outer ring 41 is very small, close to zero. Because the shaft core 10 supports the object to be isolated in a static state, the axial middle surface of the permanent magnetic inner ring 42 can be located near the axial middle surface of the permanent magnetic outer ring 41, or the axial middle surface of the permanent magnetic inner ring 42 can coincide with the axial middle surface of the permanent magnetic outer ring 41. When the object to be isolated vibrates to generate axial displacement, the magnetic force between the permanent magnetic inner ring 42 and the permanent magnetic outer ring 41 can make the axial middle surface of the permanent magnetic inner ring 42 located near the axial middle surface of the permanent magnetic outer ring 41, that is, the permanent magnetic inner ring 42 and the shaft core 10 are always in the ideal balance position with the stiffness close to zero along the axial direction, so that the self-adaptive quasi-zero stiffness foot pad 100 can form axial quasi-zero stiffness damping. According to the damping principle, the closer the stiffness is to zero, the wider the effective frequency range of the vibration isolation is, the lower the effective frequency is, and the better the vibration isolation effect is. Therefore, the self-adaptive quasi-zero stiffness foot pad 100 can have good damping effect on axial low-frequency and high-frequency vibration, and can ensure good axial damping effect of the self-adaptive quasi-zero stiffness foot pad 100. The axial middle surface of the permanent magnetic inner ring 42 refers to a plane located in the middle of the axial direction of the permanent magnetic inner ring 42 and perpendicular to the axial direction of the permanent magnetic inner ring 42. The axial middle surface of the permanent magnetic outer ring 41 refers to a plane located in the middle of the axial direction of the permanent magnetic outer ring 41 and perpendicular to the axial direction of the permanent magnetic outer ring 41.

[0057] The "nearby" refers to: the axial middle surface of the permanent magnet inner ring 42 coincides with the axial middle surface of the permanent magnet outer ring 41, and the axial middle surface of the permanent magnet inner ring 42 is close to the axial middle surface of the permanent magnet outer ring 41, that is, the axial middle surface of the permanent magnet inner ring 42 coincides with the axial middle surface of the permanent magnet outer ring 41 as an ideal state, but a certain error or deviation is allowed, such as an error or deviation distance of less than 15% of the maximum axial amplitude of the object to be isolated, of course, in some high-precision occasions, the error or deviation distance is less than 10% or 5% of the maximum axial amplitude of the object to be isolated.

[0058] The magnetic repulsion damping mechanism 50 is used for positioning the radial position of the shaft core 10 and damping the radial vibration of the shaft core 10. The magnetic repulsion damping mechanism 50 includes an inner magnetic ring 52 and an outer magnetic ring 51, and the inner magnetic ring 52 and the outer magnetic ring 51 are coaxially arranged, so that the circumferential side of the inner magnetic ring 52 is balanced by the radial force of the outer magnetic ring 51. In addition, the outer magnetic ring 51 generates a magnetic repulsion force radially inward on the inner magnetic ring 52, that is, the inner circumferential side of the outer magnetic ring 51 and the outer circumferential side of the inner magnetic ring 52 are in magnetic repulsion, so that the inner magnetic ring 52 is positioned at the center of the outer magnetic ring 51.

[0059] The outer magnetic ring 51 is mounted on the base 20, and the outer magnetic ring 51 is arranged in the inner cavity 21, and the inner magnetic ring 52 is mounted on the shaft core 10, so that when the shaft core 10 vibrates radially, the inner magnetic ring 52 will vibrate radially in the outer magnetic ring 51, and due to the magnetic repulsion force between the outer magnetic ring 51 and the inner magnetic ring 52, when the inner magnetic ring 52 is placed in the outer magnetic ring 51, the outer magnetic ring 51 will push the inner magnetic ring 52 to automatically center radially, and can push the inner magnetic ring 52 to drive the shaft core 10 to reset radially, so as to realize radial damping of the shaft core 10.

[0060] When the inner magnetic ring 52 and the outer magnetic ring 51 are coaxial, the circumferential side of the inner magnetic ring 52 is balanced by the radial force of the outer magnetic ring 51, so that when the shaft core 10 starts to vibrate radially, the stiffness of the magnetic repulsion damping mechanism 50 is very small, close to zero, and the outer magnetic ring 51 generates a magnetic repulsion force radially inward on the inner magnetic ring 52, so that the inner magnetic ring 52 and the shaft core 10 are always in an ideal balanced position with a stiffness close to zero along the radial direction, thereby forming a radial quasi-zero stiffness damping of the self-adaptive quasi-zero stiffness foot pad 100. According to the damping principle, the closer the stiffness is to zero, the wider the effective frequency range of the vibration isolation is, the lower the effective frequency is, and the better the vibration isolation effect is. Further, the self-adaptive quasi-zero stiffness foot pad 100 has good damping effect on low-frequency and high-frequency radial vibrations, and the self-adaptive quasi-zero stiffness foot pad 100 has good radial damping effect.

[0061] Compared with the prior art, the adaptive quasi-zero stiffness foot pad 100 provided by the embodiment of the application has the adaptive magnetic force type negative feedback structure formed by arranging the permanent magnet inner ring 42 on the shaft core 10 and arranging the permanent magnet outer ring 41 around the permanent magnet inner ring 42, and the outer circumferential side of the permanent magnet inner ring 42 is magnetically attracted to the permanent magnet outer ring 41. When the axial middle surface of the permanent magnet inner ring 42 is near the axial middle surface of the permanent magnet outer ring 41, the stiffness is very small and close to zero. When the vibration of the object to be isolated generates axial displacement, the permanent magnet inner ring 42 and the permanent magnet outer ring 41 will generate adaptive magnetic force in the opposite direction of the displacement according to the size of the displacement, so that the permanent magnet inner ring 42 and the shaft core 10 are always in the ideal equilibrium position with stiffness close to zero along the axial direction, forming axial quasi-zero stiffness damping. The inner magnetic ring 52 is arranged on the shaft core 10, and the outer magnetic ring 51 is coaxially arranged around the inner magnetic ring 52. The outer magnetic ring 51 generates radial magnetic repulsion on the inner magnetic ring 52, which makes the inner magnetic ring 52 drive the shaft core 10 to tend to the radial center, so as to slow down the radial vibration of the shaft core 10. In addition, the magnetic attraction damping mechanism 50 has very small stiffness close to zero at the beginning of radial vibration, forming radial quasi-zero stiffness damping. The radial magnetic repulsion generated by the outer magnetic ring 51 on the inner magnetic ring 52 can make the inner magnetic ring 52 and the shaft core 10 always be in the ideal equilibrium position with stiffness close to zero along the radial direction, forming radial quasi-zero stiffness damping. Therefore, the adaptive quasi-zero stiffness foot pad 100 can realize good axial and radial damping, and has good damping effect.

[0062] In one embodiment, the magnetic repulsion damping mechanism 50 is in multiple groups, and the multiple groups of magnetic repulsion damping mechanisms 50 are arranged at intervals along the axial direction of the shaft core 10. That is, the inner magnetic ring 52 and the outer magnetic ring 51 are provided in multiple pairs, multiple inner magnetic rings 52 are arranged at intervals along the axial direction of the shaft core 10, and multiple outer magnetic rings 51 are arranged at intervals along the axial direction of the shaft core 10. When the shaft core 10 vibrates radially, the outer magnetic ring 51 of each magnetic repulsion damping mechanism 50 generates radial magnetic repulsion on the inner magnetic ring 52, so that the shaft core 10 is subjected to radial centering thrust at multiple positions in the axial direction, so as to better push the shaft core 10 to be radially reset, thereby improving the damping effect. In the embodiment, the magnetic repulsion damping mechanism 50 is in two groups. It can be understood that the magnetic repulsion damping mechanism 50 can also be in three groups, four groups, etc. Of course, the magnetic repulsion damping mechanism 50 can also be arranged in only one group.

[0063] In one embodiment, please refer to Figure 1When the magnetic repulsion damping mechanism 50 is multiple groups, the distance between the inner magnetic ring 52 and the outer magnetic ring 51 in the adjacent two groups of magnetic repulsion damping mechanism 50 is not equal, that is, in the adjacent two groups of magnetic repulsion damping mechanism 50: the distance between one inner magnetic ring 52a and the corresponding outer magnetic ring 51a is D1, and the distance between the other inner magnetic ring 52b and the corresponding outer magnetic ring 51b is D2, D1 and D2 are not equal, so that when the shaft core 10 is axially offset too much, the inner magnetic ring 52 on the shaft core 10 and the outer magnetic ring 51 corresponding to the adjacent inner magnetic ring 52 are prevented from interfering and being stuck, and the inner magnetic ring 52 on the shaft core 10 is prevented from colliding with the outer magnetic ring 51 corresponding to the adjacent inner magnetic ring 52. On the other hand, it realizes infinite freedom in a certain range, that is, the universal self-adaptive damping and buffering function.

[0064] In one embodiment, when the magnetic repulsion damping mechanism 50 is multiple groups, the distance between the inner magnetic ring 52 and the outer magnetic ring 51 in any two groups of magnetic repulsion damping mechanism 50 is not equal, that is, in any two groups of magnetic repulsion damping mechanism 50: the distance between one inner magnetic ring 52a and the corresponding outer magnetic ring 51a is D1, and the distance between the other inner magnetic ring 52b and the corresponding outer magnetic ring 51b is D2, D1 and D2 are not equal, so that when the shaft core 10 is axially offset too much, the inner magnetic ring 52 on the shaft core 10 and the outer magnetic ring 51 corresponding to the adjacent inner magnetic ring 52 are prevented from interfering and being stuck, and the inner magnetic ring 52 on the shaft core 10 is prevented from colliding with the outer magnetic ring 51 corresponding to the adjacent inner magnetic ring 52.

[0065] In one embodiment, when the magnetic repulsion damping mechanism 50 is multiple groups, the size of the inner magnetic ring 52 of the adjacent group of magnetic repulsion damping mechanism 50 can be different, or the size of the outer magnetic ring 51 of the adjacent group of magnetic repulsion damping mechanism 50 can also be different, so that the distance between the inner magnetic ring 52 and the outer magnetic ring 51 in the adjacent two groups of magnetic repulsion damping mechanism 50 is not equal. Of course, the size of the inner magnetic ring 52 of the adjacent group of magnetic repulsion damping mechanism 50 can also be different, and the size of the outer magnetic ring 51 of the adjacent group of magnetic repulsion damping mechanism 50 can also be different, so that the distance between the inner magnetic ring 52 and the outer magnetic ring 51 in the adjacent two groups of magnetic repulsion damping mechanism 50 is not equal.

[0066] As in the present embodiment, the magnetic repulsion damping mechanism 50 is two groups, the outer diameter of the inner magnetic ring 52a of the magnetic repulsion damping mechanism 50 close to the end cover 30 is greater than the outer diameter of the inner magnetic ring 52b of the magnetic repulsion damping mechanism 50 away from the end cover 30. The outer diameter of the outer magnetic ring 51a of the magnetic repulsion damping mechanism 50 close to the end cover 30 is greater than the outer diameter of the outer magnetic ring 51b of the magnetic repulsion damping mechanism 50 away from the end cover 30, and the inner diameter of the outer magnetic ring 51a of the magnetic repulsion damping mechanism 50 close to the end cover 30 is greater than the inner diameter of the outer magnetic ring 51b of the magnetic repulsion damping mechanism 50 away from the end cover 30, then the distance D1 between the inner magnetic ring 52a of the magnetic repulsion damping mechanism 50 close to the end cover 30 and the corresponding outer magnetic ring 51a; the distance D2 between the inner magnetic ring 52b of the magnetic repulsion damping mechanism 50 away from the end cover 30 and the corresponding outer magnetic ring 51b, so that D1 and D2 are not equal.

[0067] In one embodiment, along the axial direction of the shaft core 10, a group of magnetic attraction damping mechanisms 40 can be arranged to reduce the volume of the adaptive quasi-zero stiffness foot pad 100, facilitating use. Understandably, along the axial direction of the shaft core 10, multiple groups of magnetic attraction damping mechanisms 40 can also be arranged to improve the axial damping effect of the adaptive quasi-zero stiffness foot pad 100.

[0068] In one embodiment, the magnetic attraction damping mechanism 40 is respectively provided with a magnetic repulsion damping mechanism 50 at both ends along the axial direction of the shaft core 10, that is, the opposite ends of the permanent magnetic inner ring 42 are respectively provided with an inner magnetic ring 52, and the opposite ends of the corresponding permanent magnetic outer ring 41 are respectively provided with an outer magnetic ring 51, thereby forming a magnetic repulsion damping mechanism 50 at the opposite ends of the magnetic attraction damping mechanism 40. When the shaft core 10 vibrates radially, the outer magnetic ring 51 of the magnetic repulsion damping mechanism 50 at the opposite ends of the magnetic attraction damping mechanism 40 generates a radial magnetic repulsion force on the inner magnetic ring 52, so that the shaft core 10 is subjected to radial centering thrust from the inner magnetic ring 52 at multiple locations in the axial direction, so as to better push the shaft core 10 to return radially, thereby improving the damping effect, and the permanent magnetic inner ring 42 and the permanent magnetic outer ring 41 can also be centered and positioned.

[0069] In one embodiment, the distance between the inner magnetic ring 52 and the corresponding outer magnetic ring 51 is not equal to the distance between the permanent magnetic inner ring 42 and the corresponding permanent magnetic outer ring 41. That is, the distance between the permanent magnetic inner ring 42 and the permanent magnetic outer ring 41 in the magnetic attraction damping mechanism 40 is not equal to the distance between the inner magnetic ring 52 and the outer magnetic ring 51 in the magnetic repulsion damping mechanism 50 at each end of the magnetic attraction damping mechanism 40.

[0070] As in the present embodiment, the distance D1 between the inner magnetic ring 52a of the magnetic repulsion damping mechanism 50 close to the end cover 30 and the corresponding outer magnetic ring 51a; the distance T between the permanent magnetic inner ring 42 and the permanent magnetic outer ring 41 in the magnetic attraction damping mechanism 40, then D1 is not equal to T. The distance D2 between the inner magnetic ring 52b of the magnetic repulsion damping mechanism 50 away from the end cover 30 and the corresponding outer magnetic ring 51b; the distance T between the permanent magnetic inner ring 42 and the permanent magnetic outer ring 41 in the magnetic attraction damping mechanism 40, then D2 is not equal to T.

[0071] In one embodiment, referring to Figure 1 and Figure 3 , the side wall of the inner cavity 21 can be provided with a stepped groove 22, and the outer magnetic ring 51 and the permanent magnetic outer ring 41 are positioned and supported by the stepped surface of the stepped groove 22. As in the present embodiment, a first stepped groove 221 can be provided in the inner cavity 21 to position and install the outer magnetic ring 51b of the magnetic repulsion damping mechanism 50 away from the end cover 30, a second stepped groove 222 is provided at one end of the first stepped groove 221 close to the end cover 30 to position and install the permanent magnetic outer ring 41, and a third stepped groove 223 is provided at one end of the second stepped groove 222 close to the end cover 30 to position and install the outer magnetic ring 51a of the magnetic repulsion damping mechanism 50 close to the end cover 30. That is, the number of stepped grooves 22 can be set according to the number and outer diameter of the outer magnetic ring 51 and the permanent magnetic outer ring 41 to cooperate with the positioning and supporting of the corresponding outer magnetic ring 51 and the permanent magnetic outer ring 41.

[0072] In one embodiment, a blind hole 23 is provided in the bottom of the inner cavity 21, the end of the shaft core 10 away from the end cover 30 extends into the blind hole 23, the inner diameter of the blind hole 23 is larger than the outer diameter of the shaft core 10, so that a limiting gap 231 is formed between the inner wall of the blind hole 23 and the shaft core 10, the end of the shaft core 10 away from the end cover 30 can vibrate in the blind hole 23, and the depth of the limiting gap 231 can also limit the axial vibration amplitude of the shaft core 10. The radial vibration amplitude of the shaft core 10 is limited by the limiting gap 231 between the inner wall of the blind hole 23 and the shaft core 10 and the vibration gap 311 between the side wall of the through hole 31 of the end cover 30 and the shaft core 10. Since the shaft core 10 of the adaptive quasi-zero stiffness foot pad 100 generally supports the object to be isolated, the axial and radial vibration amplitudes of the object to be isolated are generally small, but in some special cases, such as external force pressing the object to be isolated or abnormality of the object to be isolated, the axial and / or radial vibration amplitudes of the object to be isolated will greatly increase. Limiting the radial and axial vibration amplitudes of the shaft core 10 can make the base 20 hard support the shaft core 10 when the object to be isolated is abnormal, avoiding damage caused by excessive inclination or deviation of the object to be isolated, and also protecting the magnetic repulsion damping mechanism 50 from collision between the inner magnetic ring 52 and the outer magnetic ring 51.

[0073] In one embodiment, the distance between the blind hole 23 and the end surface of the shaft core 10 can define the amplitude of the axial vibration of the shaft core 10. Of course, the depth of the blind hole 23 can also be set to be greater than the amplitude of the axial vibration of the shaft core 10.

[0074] In one embodiment, the permanent magnet outer ring 41 can be fixed in the base 20 by interference fit or the like. Of course, it can also be fixed in the base 20 by other means, such as bonding in the base 20. It can also be positioned in the base 20 by a fixing sleeve, such as clamping the fixing sleeve around the permanent magnet outer ring 41, and the fixing sleeve is bonded, welded or interference fit fixed in the base 20.

[0075] In one embodiment, the permanent magnet inner ring 42 can be fixed on the shaft core 10 by interference fit or the like. Of course, it can also be fixed on the shaft core 10 by other means, such as bonding on the shaft core 10.

[0076] In one embodiment, the outer magnetic ring 51 can be fixed in the base 20 by interference fit or the like. Of course, it can also be fixed in the base 20 by other means, such as bonding in the base 20. It can also be positioned in the base 20 by a fixing sleeve, such as clamping the fixing sleeve around the outer magnetic ring 51, and the fixing sleeve is bonded, welded or interference fit fixed in the base 20.

[0077] In one embodiment, the inner magnetic ring 52 can be fixed on the shaft core 10 by interference fit or the like. Of course, it can also be fixed on the shaft core 10 by other means, such as bonding on the shaft core 10.

[0078] In one embodiment, please refer to Figures 1 to 3 , the shaft core 10 is provided with a positioning structure 12, and the positioning structure 12 positions and fixes the inner magnetic ring 52 and the permanent magnet inner ring 42 on the shaft core 10. For example, a plurality of positioning structures 12 can be provided, and the opposite ends of the inner magnetic ring 52 are positioned and fixed by the plurality of positioning structures 12, so as to fix the inner magnetic ring 52 on the shaft core 10. The positioning structure 12 is arranged on the shaft core 10 to facilitate the installation and fixation of the inner magnetic ring 52. Similarly, the opposite ends of the permanent magnet inner ring 42 are positioned and fixed by the plurality of positioning structures 12, so as to fix the permanent magnet inner ring 42 on the shaft core 10. The positioning structure 12 is arranged on the shaft core 10 to facilitate the installation and fixation of the permanent magnet inner ring 42.

[0079] In one embodiment, the positioning structure 12 is one of a ring, a snap ring and a nut. The inner magnetic ring 52 is positioned by setting the ring, the snap ring or the nut on the shaft core 10. For example, the ring can be set on the shaft core 10, and the two ends of the inner magnetic ring 52 are positioned by the ring to fix the inner magnetic ring 52. The ring can be fixed on the shaft core 10 by welding, adhesion, interference fit or the like. Of course, the inner magnetic ring 52 can also be positioned by cooperation of the ring, the snap ring or the nut, that is, the structures of the plurality of positioning structures 12 can be set differently. Understandably, the permanent magnetic inner ring 42 is positioned by setting the ring, the snap ring or the nut on the shaft core 10. For example, the ring can be set on the shaft core 10, and the two ends of the permanent magnetic inner ring 42 are positioned by the ring to fix the permanent magnetic inner ring 42. The ring can be fixed on the shaft core 10 by welding, adhesion, interference fit or the like. Of course, the permanent magnetic inner ring 42 can also be positioned by cooperation of the ring, the snap ring or the nut, that is, the structures of the plurality of positioning structures 12 can be set differently.

[0080] In one embodiment, the base 11 can be integrally formed on the shaft core 10, and the base 11 is used as a reference for positioning and fixing the inner magnetic ring 52 and the permanent magnetic inner ring 42 in cooperation with the positioning structure 12. Of course, only the plurality of positioning structures 12 can be arranged on the shaft core 10 to position and fix the inner magnetic ring 52 and the permanent magnetic inner ring 42.

[0081] In one embodiment, the outer diameter of the positioning structure 12 close to the end cover 30 is greater than the inner diameter of the through hole 31 on the end cover 30, so that the positioning structure 12 is stopped by the end cover 30 to limit the amplitude of the vibration of the shaft core 10 in the axial direction towards the end cover 30, so as to prevent the shaft core 10 from vibrating too much in the axial direction, and the structure also protects the inner magnetic ring 52. Understandably, when the end of the shaft core 10 close to the end cover 30 is provided with the inner magnetic ring 52, the inner magnetic ring 52 can also be stopped by the end cover 30 to limit the amplitude of the vibration of the shaft core 10 in the axial direction towards the end cover 30. Of course, when the end of the shaft core 10 close to the end cover 30 is provided with the permanent magnetic inner ring 42, the permanent magnetic inner ring 42 can also be stopped by the end cover 30 to limit the amplitude of the vibration of the shaft core 10 in the axial direction towards the end cover 30.

[0082] In one embodiment, the shaft core 10 is a non-magnetic shaft, that is, the shaft core 10 is made of a non-magnetic material, that is, the shaft core 10 is made of a non-magnetic metal material, such as aluminum alloy, copper or the like; the shaft core 10 can also be made of a non-magnetic and non-metal material, such as plastic, ceramic or the like, to ensure that the shaft core 10 has good rigidity and high load capacity, and does not affect the interaction of the magnetic field between the inner magnetic ring 52 and the outer magnetic ring 51.

[0083] In one embodiment, please refer to Figure 1 , Figure 3 andFigure 4 The end cover 30 is provided with a connecting ring 32, which can be fixedly connected with the base 20 by welding, bonding, threaded connection or the like, so as to fix the end cover 30 on the base 20. In the embodiment, the inner cavity 21 is provided with a stepped groove 22, and the connecting ring 32 of the end cover 30 can be connected with the inner wall of the stepped groove 22 close to the end cover 30. In the embodiment, the connecting ring 32 of the end cover 30 is connected with the inner wall of the third stepped groove 223. Of course, if the inner cavity 21 is not provided with the stepped groove 22, the connecting ring 32 of the end cover 30 can be connected with the inner wall of the inner cavity 21. Of course, the connecting ring 32 can also be connected with the outer circumferential surface of the base 20.

[0084] In one embodiment, the end cover 30 is a non-magnetic cover, that is, the end cover 30 is made of a non-magnetic material, that is, the end cover 30 is made of a non-magnetic metal material, such as aluminum alloy, copper, etc. The end cover 30 can also be made of a non-magnetic and non-metal material, such as plastic, ceramic, etc. to ensure that the end cover 30 has good stiffness performance and high load capacity, and does not affect the interaction of the magnetic field between the inner magnetic ring 52 and the outer magnetic ring 51.

[0085] In one embodiment, please refer to Figure 1 and Figure 3 The base 20 is provided with a connecting shaft 24, which is located at the end of the base 20 away from the end cover 30 and is coaxially arranged with the shaft core 10. The connecting shaft 24 is arranged to facilitate connection with the external mounting seat when the adaptive quasi-zero stiffness foot pad is used. In addition, the coaxial arrangement of the connecting shaft 24 and the shaft core 10 can better reduce vibration.

[0086] In one embodiment, the base 20 is a non-magnetic seat, that is, the base 20 is made of a non-magnetic material, that is, the base 20 is made of a non-magnetic metal material, such as aluminum alloy, copper, etc. The base 20 can also be made of a non-magnetic and non-metal material, such as plastic, ceramic, etc. to ensure that the base 20 has good stiffness performance and high load capacity, and does not affect the interaction of the magnetic field between the inner magnetic ring 52 and the outer magnetic ring 51.

[0087] In one embodiment, please refer to Figure 1 and Figure 5 The outer magnetic ring 51 is radially magnetized, that is, the outer magnetic ring 51 is radially magnetized from the center axis, that is, the polarity of the inner side of the outer magnetic ring 51 is opposite to the polarity of the outer side of the outer magnetic ring 51. The inner magnetic ring 52 is radially magnetized, that is, the inner magnetic ring 52 is radially magnetized from the center axis, that is, the polarity of the inner side of the inner magnetic ring 52 is opposite to the polarity of the outer side of the inner magnetic ring 52.

[0088] The inner magnetic ring 52 and the outer magnetic ring 51 are both radially magnetized, and the magnetization directions of the inner magnetic ring 52 and the outer magnetic ring 51 are opposite, so that the radial inner side or inner circumferential side of the inner magnetic ring 52 has a single magnetic pole, and the radial outer side or outer circumferential side of the outer magnetic ring 51 has a single magnetic pole, so that when the axial position of the inner magnetic ring 52 in the outer magnetic ring 51 changes, the inner magnetic ring 52 and the outer magnetic ring 51 generate radial magnetic repulsion, and when the axial position of the inner magnetic ring 52 in the outer magnetic ring 51 changes, the magnetic repulsion of the outer magnetic ring 51 on both ends of the inner magnetic ring 52 is very small, and the effect on the damping of the axis is also very small.

[0089] The inner magnetic ring 52 and the outer magnetic ring 51 are both radially magnetized, and the magnetization directions of the inner magnetic ring 52 and the outer magnetic ring 51 are opposite, so that the radial inner side or inner circumferential side of the inner magnetic ring 52 has a single magnetic pole, and the radial outer side or outer circumferential side of the outer magnetic ring 51 has a single magnetic pole, so that when the axial position of the inner magnetic ring 52 in the outer magnetic ring 51 changes, the inner magnetic ring 52 and the outer magnetic ring 51 generate radial magnetic repulsion, and when the axial position of the inner magnetic ring 52 in the outer magnetic ring 51 changes, the magnetic repulsion of the outer magnetic ring 51 on both ends of the inner magnetic ring 52 is very small, and the effect on the damping of the axis is also very small.

[0090] In one embodiment, when the axial middle surface of the inner magnetic ring 52 coincides with the axial middle surface of the outer magnetic ring 51, the magnetic force of the outer magnetic ring 51 on both ends of the inner magnetic ring 52 is balanced, and near this balance position, that is, when the axial middle surface of the inner magnetic ring 52 coincides with the axial middle surface of the outer magnetic ring 51, or the axial middle surface of the inner magnetic ring 52 is located near the axial middle surface of the outer magnetic ring 51, that is, the axial middle surface of the inner magnetic ring 52 is adjacent to the axial middle surface of the outer magnetic ring 51, the axial stiffness between the inner magnetic ring 52 and the outer magnetic ring 51 can be zero or close to zero, and the magnetic attraction damping mechanism has very small stiffness close to zero at the beginning of vibration, so that the axial stiffness of the entire adaptive quasi-zero stiffness foot mat 100 is closer to zero, and the damping effect is improved. The axial middle surface of the inner magnetic ring 52 refers to a plane that is located in the middle of the axial direction of the inner magnetic ring 52 and is perpendicular to the axial direction of the inner magnetic ring 52. The axial middle surface of the outer magnetic ring 51 refers to a plane that is located in the middle of the axial direction of the outer magnetic ring 51 and is perpendicular to the axial direction of the outer magnetic ring 51.

[0091] In one embodiment, the radial projection of one of the inner magnetic ring 52 and the outer magnetic ring 51 on the shaft core 10 always covers the radial projection of the other on the shaft core 10 when the shaft core 10 axially vibrates. As when the axial length of the outer magnetic ring 51 is greater than the axial length of the inner magnetic ring 52, the radial projection of the outer magnetic ring 51 on the shaft core 10 always covers the radial projection of the inner magnetic ring 52 on the shaft core 10 when the shaft core 10 axially vibrates, the inner magnetic ring 52 is always inside the outer magnetic ring 51 when the shaft core 10 axially vibrates, and the magnetic repulsion force of the outer magnetic ring 51 on both ends of the inner magnetic ring 52 is very small when the axial position of the inner magnetic ring 52 in the outer magnetic ring 51 changes. This can make the magnetic repulsion damping mechanism 50 have little effect on the axial damping effect, ensuring good axial damping effect of the shaft core 10; and can ensure that the magnetic repulsion force between the outer magnetic ring 51 and the inner magnetic ring 52 changes little, to ensure good radial damping effect on the shaft core 10.

[0092] It can be understood that the radial projection of one of the inner magnetic ring 52 and the outer magnetic ring 51 on the shaft core 10 always covers the radial projection of the other on the shaft core 10 when the shaft core 10 axially vibrates. When the axial length of the inner magnetic ring 52 is greater than the axial length of the outer magnetic ring 51, the radial projection of the inner magnetic ring 52 on the shaft core 10 always covers the radial projection of the outer magnetic ring 51 on the shaft core 10 when the shaft core 10 axially vibrates, and the outer magnetic ring 51 is always located in the region corresponding to the outer periphery of the inner magnetic ring 52 when the shaft core 10 axially vibrates. This can make the magnetic repulsion damping mechanism 50 have little effect on the axial damping effect, ensuring good axial damping effect of the shaft core 10; and can ensure that the magnetic repulsion force between the outer magnetic ring 51 and the inner magnetic ring 52 changes little, to ensure good radial damping effect on the shaft core 10.

[0093] In one embodiment, the absolute value of the difference between the axial length of the outer magnetic ring 51 and the axial length of the inner magnetic ring 52 is greater than the axial vibration stroke of the shaft core 10, and when the self-adaptive quasi-zero stiffness foot pad is in a static state supporting the object to be isolated, the axial middle surface of the inner magnetic ring 52 coincides with the axial middle surface of the outer magnetic ring 51, or the axial middle surface of the inner magnetic ring 52 is located near the axial middle surface of the outer magnetic ring 51, that is, the axial middle surface of the inner magnetic ring 52 is adjacent to the axial middle surface of the outer magnetic ring 51. In this way, the inner magnetic ring 52 is always inside the outer magnetic ring 51 or the outer magnetic ring 51 is always located in the region corresponding to the outer periphery of the inner magnetic ring 52 when the shaft core 10 and the inner magnetic ring 52 vibrate axially. Since the magnetic repulsion force of the outer magnetic ring 51 on both ends of the inner magnetic ring 52 is very small when the axial position of the inner magnetic ring 52 in the outer magnetic ring 51 changes, the magnetic repulsion damping mechanism 50 can have little effect on the axial damping effect, ensuring good axial damping effect of the shaft core 10; and can ensure that the magnetic repulsion force between the outer magnetic ring 51 and the inner magnetic ring 52 changes little, to ensure good radial damping effect on the shaft core 10.

[0094] In one embodiment, the axial length of the outer magnetic ring 51 is greater than the axial length of the inner magnetic ring 52, and the difference between the axial lengths of the outer magnetic ring 51 and the inner magnetic ring 52 is greater than the axial vibration stroke of the shaft core 10. When the adaptive quasi-zero stiffness foot pad statically supports the object to be isolated, the axial mid-surface of the inner magnetic ring 52 coincides with the axial mid-surface of the outer magnetic ring 51, or the axial mid-surface of the inner magnetic ring 52 is located near the axial mid-surface of the outer magnetic ring 51. That is, the axial mid-surface of the inner magnetic ring 52 is adjacent to the axial mid-surface of the outer magnetic ring 51, which can minimize the impact of the magnetic repulsion damping mechanism 50 on the axial damping effect and ensure a good axial damping effect for the shaft core 10. Moreover, it can ensure that the change in magnetic repulsion between the outer magnetic ring 51 and the inner magnetic ring 52 is small, so as to ensure a good radial damping effect for the shaft core 10.

[0095] Understandably, the axial length of the inner magnetic ring 52 is greater than the axial length of the outer magnetic ring 51, and the difference between the axial lengths of the inner magnetic ring 52 and the outer magnetic ring 51 is greater than the axial vibration stroke of the shaft core 10. When the adaptive quasi-zero stiffness foot pad statically supports the object to be isolated, the axial mid-surface of the inner magnetic ring 52 coincides with the axial mid-surface of the outer magnetic ring 51, or the axial mid-surface of the inner magnetic ring 52 is located near the axial mid-surface of the outer magnetic ring 51. That is to say, the axial mid-surface of the inner magnetic ring 52 is adjacent to the axial mid-surface of the outer magnetic ring 51. This can also minimize the impact of the magnetic repulsion damping mechanism 50 on the axial damping effect, ensuring a good axial damping effect for the shaft core 10. Moreover, it can also ensure that the change in magnetic repulsion between the outer magnetic ring 51 and the inner magnetic ring 52 is small, so as to ensure a good radial damping effect for the shaft core 10.

[0096] The term "adjacent" refers to the following: the axial mid-surface of the inner magnetic ring 52 coincides with the axial mid-surface of the outer magnetic ring 51, and the distance between the axial mid-surface of the inner magnetic ring 52 and the axial mid-surface of the outer magnetic ring 51 is very small. In other words, it is ideal for the axial mid-surface of the inner magnetic ring 52 and the axial mid-surface of the outer magnetic ring 51 to coincide. However, a certain error or deviation is allowed. For example, the distance of the error or deviation is less than 15% of the maximum axial amplitude of the object to be isolated. Of course, in some cases where high precision is required, the distance of the error or deviation is less than 10% or less than 5% of the maximum axial amplitude of the object to be isolated.

[0097] In one embodiment, the magnetic force of the outer magnetic ring 51 can be adjusted by adjusting the magnetic energy product of the outer magnetic ring 51, thereby adjusting the magnetic repulsion between the outer magnetic ring 51 and the inner magnetic ring 52, and thus adjusting the radial vibration reduction effect of the magnetic repulsion damping mechanism 50.

[0098] In one embodiment, the magnetic force of the inner magnetic ring 52 can be adjusted by adjusting the magnetic energy product of the inner magnetic ring 52, thereby adjusting the magnetic repulsion between the outer magnetic ring 51 and the inner magnetic ring 52, and thus adjusting the radial vibration reduction effect of the magnetic repulsion damping mechanism 50.

[0099] Of course, the magnetic repulsion between the outer magnetic ring 51 and the inner magnetic ring 52 can also be adjusted by adjusting the spacing between the outer magnetic ring 51 and the inner magnetic ring 52, thereby adjusting the radial damping effect of the magnetic repulsion damping mechanism 50.

[0100] In one embodiment, referring to Figure 1 and Figure 5 , the outer magnetic ring 51 includes at least one first annular magnet 511, and the first annular magnet 511 is made of a ring-shaped permanent magnet, that is, the first annular magnet 511 is an integrally formed ring-shaped permanent magnet. When there are multiple first annular magnets 511, the multiple first annular magnets 511 are arranged in the axial direction of the shaft core 10, each first annular magnet 511 is installed in the base 20, and the first annular magnet 511 generates a magnetic force on the inner magnetic ring 52. The outer magnetic ring 51 uses the first annular magnet 511, which not only facilitates the installation of the outer magnetic ring 51 in the base 20 and facilitates assembly, but also facilitates the adjustment of the number of first annular magnets 511 to adjust the magnetic force of the outer magnetic ring 51, thereby adjusting the magnetic force of the outer magnetic ring 51 on the inner magnetic ring 52.

[0101] In one embodiment, referring to Figure 1 and Figure 5 , the inner magnetic ring 52 includes at least one second annular magnet 521, and the second annular magnet 521 is made of a ring-shaped permanent magnet, that is, the second annular magnet 521 is an integrally formed ring-shaped permanent magnet. When there are multiple second annular magnets 521, the multiple second annular magnets 521 are arranged in the axial direction of the shaft core 10, each second annular magnet 521 is installed on the shaft core 10, and the second annular magnet 521 generates a magnetic force on the outer magnetic ring 51. The inner magnetic ring 52 uses the second annular magnet 521, which not only facilitates the installation of the inner magnetic ring 52 on the shaft core 10 and facilitates assembly, but also facilitates the adjustment of the number of second annular magnets 521 to adjust the magnetic force of the inner magnetic ring 52, thereby adjusting the magnetic force of the inner magnetic ring 52 on the outer magnetic ring 51.

[0102] In one embodiment, referring to Figure 1 and Figure 5 , the outer magnetic ring 51 includes the first annular magnet 511, and the inner magnetic ring 52 includes the second annular magnet 521, which facilitates the adjustment of the number of first annular magnets 511 and second annular magnets 521 to adjust the magnetic force between the inner magnetic ring 52 and the outer magnetic ring 51, thereby adjusting the radial damping performance of the adaptive quasi-zero stiffness foot pad 100 to adapt to different weights of the object to be damped and different vibration amplitudes of the object to be damped.

[0103] In one embodiment, referring to Figure 1 and Figure 6The permanent magnet inner ring 42 is coaxial with the permanent magnet outer ring 41, so that the permanent magnet inner ring 42 is balanced by the circumferential magnetic force of the permanent magnet outer ring 41, and the shaft core 10 and the permanent magnet inner ring 42 move smoothly and flexibly along the axial direction.

[0104] In one embodiment, the shaft core 10 can be coaxial with the permanent magnet outer ring 41, and the shaft core 10 is coaxial with the permanent magnet inner ring 42, so that the permanent magnet inner ring 42 is coaxial with the permanent magnet outer ring 41. It can be understood that the shaft core 10 can also be positioned by the inner cavity 21, so that the permanent magnet inner ring 42 is coaxial with the permanent magnet outer ring 41, and the central axis of the shaft core 10 and the central axis of the permanent magnet inner ring 42 can have a certain deviation, so that the permanent magnet inner ring 42 is balanced by the circumferential magnetic force of the permanent magnet outer ring 41.

[0105] In one embodiment, referring to Figure 1 and Figure 6 , the permanent magnet outer ring 41 is radially magnetized, that is, the permanent magnet outer ring 41 is radially magnetized from the central axis to the outside, that is, the polarity of the radially inner side of the permanent magnet outer ring 41 is opposite to the polarity of the radially outer side of the permanent magnet outer ring 41. The permanent magnet inner ring 42 is radially magnetized, that is, the permanent magnet inner ring 42 is radially magnetized from the central axis to the outside, that is, the polarity of the radially inner side of the permanent magnet inner ring 42 is opposite to the polarity of the radially outer side of the permanent magnet inner ring 42.

[0106] The permanent magnet inner ring 42 and the permanent magnet outer ring 41 are magnetized in the same direction, that is, the permanent magnet inner ring 42 and the permanent magnet outer ring 41 are both radially magnetized from the central axis to the outside, or the permanent magnet inner ring 42 and the permanent magnet outer ring 41 are both magnetized from the outside to the inside. That is, when the radially inner side or inner periphery of the permanent magnet inner ring 42 is an S pole and the radially outer side or outer periphery of the permanent magnet inner ring 42 is an N pole, the radially inner side or inner periphery of the permanent magnet outer ring 41 is an S pole, and the radially outer side or outer periphery of the permanent magnet outer ring 41 is an N pole. Or, when the radially inner side or inner periphery of the permanent magnet inner ring 42 is an N pole and the radially outer side or outer periphery of the permanent magnet inner ring 42 is an S pole, the radially inner side or inner periphery of the permanent magnet outer ring 41 is an N pole, and the radially outer side or outer periphery of the permanent magnet outer ring 41 is an S pole. In this way, the permanent magnet inner ring 42 and the permanent magnet outer ring 41 are attracted to each other under the action of the magnetic field generated by each other, so that when vibration is transmitted to the shaft core 10 and the shaft core 10 is axially moved, the attraction between the permanent magnet inner ring 42 and the permanent magnet outer ring 41 reduces the vibration, thereby playing a damping role.

[0107] In one embodiment, referring to Figure 1 and Figure 6The permanent magnet outer ring 41 comprises at least one first magnetic ring body 411. The first magnetic ring body 411 is made of a ring-shaped permanent magnet. When the first magnetic ring body 411 is in a plurality, the plurality of first magnetic ring bodies 411 are arranged along the axial direction of the shaft core 10. Each first magnetic ring body 411 is installed in the base 20. The first magnetic ring body 411 generates a magnetic force on the permanent magnet inner ring 42. The permanent magnet outer ring 41 uses the first magnetic ring body 411. The permanent magnet outer ring 41 is conveniently installed in the base 20, facilitating assembly. The number of the first magnetic ring body 411 can be adjusted to adjust the magnetic force of the permanent magnet outer ring 41, and further adjust the magnetic force of the permanent magnet outer ring 41 on the permanent magnet inner ring 42.

[0108] In one embodiment, referring to Figure 1 and Figure 6 The permanent magnet inner ring 42 comprises at least one second magnetic ring body 421. The second magnetic ring body 421 is made of a ring-shaped permanent magnet. When the second magnetic ring body 421 is in a plurality, the plurality of second magnetic ring bodies 421 are arranged along the axial direction of the shaft core 10. Each second magnetic ring body 421 is installed on the shaft core 10. The second magnetic ring body 421 generates a magnetic force on the permanent magnet outer ring 41. The permanent magnet inner ring 42 uses the second magnetic ring body 421. The permanent magnet inner ring 42 is conveniently installed on the shaft core 10, facilitating assembly. The number of the second magnetic ring body 421 can be adjusted to adjust the magnetic force of the permanent magnet inner ring 42, and further adjust the magnetic force of the permanent magnet inner ring 42 on the permanent magnet outer ring 41.

[0109] In one embodiment, the permanent magnet outer ring 41 comprises the first magnetic ring body 411, and the permanent magnet inner ring 42 comprises the second magnetic ring body 421. The first magnetic ring body 411 and the second magnetic ring body 421 can be conveniently adjusted to adjust the magnetic force therebetween, to adjust the stiffness performance of the adaptive quasi-zero stiffness foot pad 100, to adapt to different weights of the object to be isolated and different vibration amplitudes of the object to be isolated.

[0110] Referring to Figure 7 , Figure 7 is a top view structural schematic diagram of the inner magnetic ring and the outer magnetic ring provided in the embodiment. The structure of the embodiment is a modification based on the corresponding embodiment in Figure 5 .

[0111] In one embodiment, referring to Figure 7 The outer magnetic ring 51 comprises a plurality of first magnets 512. The first magnet 512 is a permanent magnet, i.e., the first magnet 512 is made of a permanent magnetic material. The plurality of first magnets 512 are arranged in a ring array to form a ring structure. The plurality of first magnets 512 are used. The processing and manufacturing are convenient, especially convenient for radiation magnetization.

[0112] In one embodiment, each first magnet 512 is in the shape of a sector, which facilitates the combination of multiple first magnets 512 to form a ring structure. It is appreciated that each first magnet 512 can also be in other shapes, such as a cuboid, for ease of manufacture, while multiple first magnets 512 are arranged in a ring array.

[0113] In one embodiment, referring to Figure 7 , the inner magnetic ring 52 includes multiple second magnets 522. The second magnets 522 are permanent magnets, i.e., the second magnets 522 are made of permanent magnetic material. The multiple second magnets 522 are arranged in a ring array to form a ring structure. The use of multiple second magnets 522 facilitates the manufacture, especially the radiation magnetization.

[0114] In one embodiment, each second magnet 522 is in the shape of a sector, which facilitates the combination of multiple second magnets 522 to form a ring structure. It is appreciated that each second magnet 522 can also be in other shapes, such as a cuboid, for ease of manufacture, while multiple second magnets 522 are arranged in a ring array.

[0115] In one embodiment, when the outer magnetic ring 51 includes multiple first magnets 512 arranged in a ring array and the inner magnetic ring 52 includes multiple second magnets 522 arranged in a ring array, the number of the first magnets 512 and the second magnets 522 in the circumferential direction can be increased or decreased according to the amplitude of the object to be isolated (e.g., a compressor supported thereby), so as to adjust the interaction force between the inner magnetic ring 52 and the outer magnetic ring 51, and achieve the radially optimal vibration reduction effect of the adaptive quasi-zero stiffness foot pad 100.

[0116] Referring to Figure 8 and Figure 9 , Figure 8 , the structure diagram of the permanent magnetic outer ring provided in the embodiment is shown. Figure 9 The structure diagram of the permanent magnetic inner ring provided in the embodiment is shown. The structure of the embodiment is a modification based on the embodiment corresponding to Figure 6 . The adaptive quasi-zero stiffness foot pad 100 of the embodiment is different from the adaptive quasi-zero stiffness foot pad 100 of the embodiment corresponding to Figure 6 in that:

[0117] In one embodiment, the permanent magnetic outer ring 41 includes multiple first magnetic bodies 412. The first magnetic bodies 412 are permanent magnets, i.e., the first magnetic bodies 412 are made of permanent magnetic material. The multiple first magnetic bodies 412 are arranged in a ring array to form a ring structure. The use of multiple first magnetic bodies 412 facilitates the manufacture, especially the radiation magnetization.

[0118] In one embodiment, each first magnetic body 412 is in the shape of a sector, which facilitates the combination of multiple first magnetic bodies 412 to form a ring structure. It is understood that each first magnetic body 412 can also be arranged in other shapes, such as a cuboid, to facilitate manufacturing, while multiple first magnetic bodies 412 are arranged in a ring array.

[0119] In one embodiment, the permanent magnet inner ring 42 includes multiple second magnetic bodies 422. The second magnetic bodies 422 are permanent magnets, i.e., the second magnetic bodies 422 are made of permanent magnetic material. The multiple second magnetic bodies 422 are arranged in a ring array to form a ring structure. The use of multiple second magnetic bodies 422 facilitates manufacturing, especially facilitates radiation magnetization.

[0120] In one embodiment, each second magnetic body 422 is in the shape of a sector, which facilitates the combination of multiple second magnetic bodies 422 to form a ring structure. It is understood that each second magnetic body 422 can also be arranged in other shapes, such as a cuboid, to facilitate manufacturing, while multiple second magnetic bodies 422 are arranged in a ring array.

[0121] In one embodiment, when the permanent magnet outer ring 41 includes multiple first magnetic bodies 412 arranged in a ring array, and the permanent magnet inner ring 42 includes multiple second magnetic bodies 422 arranged in a ring array, the number of circumferential first magnetic bodies 412 and second magnetic bodies 422 can be increased or decreased according to the amplitude of the supported object to be isolated (such as a supported compressor), so as to adjust the interaction force between the permanent magnet inner ring 42 and the permanent magnet outer ring 41, and achieve the optimal axial vibration reduction effect of the adaptive quasi-zero stiffness foot pad 100.

[0122] Please refer to Figure 10 , Figure 10 The cross-sectional structure diagram of the adaptive quasi-zero stiffness foot pad provided in the embodiment. The structure of the embodiment is a modification based on the embodiment corresponding to Figure 1 . The adaptive quasi-zero stiffness foot pad 100 of the embodiment is different from the adaptive quasi-zero stiffness foot pad 100 corresponding to Figure 1 .

[0123] The magnetic attraction vibration reduction mechanism 40 is multiple groups, and the multiple groups of magnetic attraction vibration reduction mechanisms 40 are arranged in the axial direction of the shaft core 10. The arrangement of multiple groups of magnetic attraction vibration reduction mechanisms 40 can cooperate with the axial vibration reduction of the shaft core 10 to improve the vibration reduction effect. In the embodiment, the magnetic attraction vibration reduction mechanism 40 is two groups. It is understood that the magnetic attraction vibration reduction mechanism 40 can also be one group, three groups, four groups, etc.

[0124] In one embodiment, the axial opposite ends of the magnetic repulsion damping mechanism 50 are respectively provided with the magnetic attraction damping mechanism 40, that is, the one end of the inner magnetic ring 52 close to the end cover 30 is provided with the permanent magnet inner ring 42a, and the one end of the inner magnetic ring 52 away from the end cover 30 is provided with the permanent magnet inner ring 42b; Correspondingly, the one end of the outer magnetic ring 51 close to the end cover 30 is provided with the permanent magnet outer ring 41a, and the one end of the inner magnetic ring 52 away from the end cover 30 is provided with the permanent magnet outer ring 41b; Thus, the middle part of the shaft core 10 on the two groups of magnetic attraction damping mechanisms 40 is automatically centered by the magnetic repulsion damping mechanism 50, that is, the outer magnetic ring 51 of the magnetic repulsion damping mechanism 50 is radially inwardly magnetically repelled to the inner magnetic ring 52, so as to better avoid the deflection of the shaft core 10.

[0125] In one embodiment, a stepped groove 22 can be formed on the side wall of the inner cavity 21. The first stepped groove 221 is arranged in the inner cavity 21 to position and install the permanent magnet outer ring 41b of the one group of magnetic attraction damping mechanisms 40 away from the end cover 30. The second stepped groove 222 is arranged at the one end of the first stepped groove 221 close to the end cover 30 to position and install the outer magnetic ring 51. The third stepped groove 223 is arranged at the one end of the second stepped groove 222 close to the end cover 30 to position and install the permanent magnet outer ring 41a of the one group of magnetic attraction damping mechanisms 40 close to the end cover 30.

[0126] Please refer to Figure 11 , Figure 11 The cross-sectional structure schematic diagram of the adaptive quasi-zero stiffness foot pad provided in the embodiment. The structure of the embodiment is a modification based on the corresponding embodiment of Figure 1 . The adaptive quasi-zero stiffness foot pad 100 of the embodiment is different from the corresponding embodiment of Figure 1 .

[0127] In the embodiment, the inner cavity 21 is a cylindrical hole structure, that is, the inner cavity 21 is not provided with a stepped groove 22, and the outer magnetic ring 51 and the permanent magnet outer ring 41 are supported and fixed in the inner cavity 21 by the positioning sleeve 25. The outer magnetic ring 51 and the permanent magnet outer ring 41 are clamped by the plurality of positioning sleeves 25, and the positioning sleeves 25 are fixed in the inner cavity 21 to fix the outer magnetic ring 51 and the permanent magnet outer ring 41 in the inner cavity 21, which is convenient for assembly.

[0128] Please refer to Figure 12 , Figure 12 The cross-sectional structure schematic diagram of the adaptive quasi-zero stiffness foot pad provided in the embodiment. The structure of the embodiment is a modification based on the corresponding embodiment of Figure 10 . The adaptive quasi-zero stiffness foot pad 100 of the embodiment is different from the corresponding embodiment of Figure 10 .

[0129] In the embodiment, the magnetic attraction damping mechanism 40 is two groups to cooperate with the axial damping of the shaft core 10. The magnetic repulsion damping mechanism 50 is two groups to cooperate with the radial damping of the shaft core 10. It can be understood that the magnetic attraction damping mechanism 40 can also be one group, three groups, four groups, etc. Similarly, the magnetic repulsion damping mechanism 50 can also be one group, three groups, four groups, etc.

[0130] In one embodiment, the magnetic attraction damping mechanism 40 is concentrated in the middle of the shaft core 10 in the axial direction, and the magnetic repulsion damping mechanism 50 is arranged at both ends of the magnetic attraction damping mechanism 40, that is, the magnetic repulsion damping mechanism 50 is distributed at both ends of the shaft core 10 in the axial direction, so that the magnetic repulsion damping mechanism 50 can position the shaft core 10 in the radial direction. It can be understood that the magnetic attraction damping mechanism 40 and the magnetic repulsion damping mechanism 50 can also be arranged alternately along the axial direction of the shaft core 10.

[0131] As in the embodiment, two groups of magnetic repulsion damping mechanisms 50 are arranged between two groups of magnetic attraction damping mechanisms 40, that is, two permanent magnet inner rings 42 are arranged on the shaft core 10, and two permanent magnet outer rings 41 are arranged in the corresponding inner cavity 21. The inner magnetic ring 52a is arranged on one end of the permanent magnet inner ring 42a close to the end cover 30, and the inner magnetic ring 52b is arranged on one end of the permanent magnet inner ring 42b away from the end cover 30. The outer magnetic ring 51a is arranged on one end of the permanent magnet outer ring 41a close to the end cover 30, and the outer magnetic ring 51b is arranged on one end of the permanent magnet outer ring 41b away from the end cover 30, so as to position the shaft core 10 in the radial direction.

[0132] In the embodiment, a stepped groove 22 with four levels can be arranged on the side wall of the inner cavity 21. The first level stepped groove 221 is arranged in the inner cavity 21 to position and install the outer magnetic ring 51b of the magnetic repulsion damping mechanism 50 away from the end cover 30. The second level stepped groove 222 is arranged at one end of the first level stepped groove 221 close to the end cover 30 to position and install the permanent magnet outer ring 41b of the magnetic attraction damping mechanism 40 away from the end cover 30. The third level stepped groove 223 is arranged at one end of the second level stepped groove 222 close to the end cover 30 to position and install the permanent magnet outer ring 41a of the magnetic attraction damping mechanism 40 close to the end cover 30. The fourth level stepped groove 224 is arranged at one end of the third level stepped groove 223 close to the end cover 30 to position and install the outer magnetic ring 51a of the magnetic repulsion damping mechanism 50 close to the end cover 30. That is, the number of levels of the stepped groove 22 can be arranged according to the number and outer diameter of the outer magnetic ring 51 and the permanent magnet outer ring 41, so as to position and support the corresponding outer magnetic ring 51 and permanent magnet outer ring 41.

[0133] The adaptive quasi-zero stiffness foot pad 100 can realize axial quasi-zero stiffness vibration reduction and radial quasi-zero stiffness vibration reduction, can ensure that the adaptive quasi-zero stiffness foot pad 100 has good vibration reduction effect on low-frequency and high-frequency vibrations, and can ensure good vibration reduction effect of the adaptive quasi-zero stiffness foot pad 100.

[0134] The embodiment of the present application also provides a compressor comprising a body, and the adaptive quasi-zero stiffness foot pad according to any one of the above embodiments is mounted on the body. The compressor uses the adaptive quasi-zero stiffness foot pad, has the technical effects of the adaptive quasi-zero stiffness foot pad, can realize good vibration isolation effect in the axial direction and the radial direction, and can also realize good vibration reduction and noise reduction in high-frequency and severe vibration of the compressor.

[0135] The compressor of the embodiment of the present application can be a rotary compressor, a reciprocating piston compressor, a scroll compressor, or the like.

[0136] The embodiment of the present application also provides a refrigeration and heating device comprising the compressor according to any one of the above embodiments. The refrigeration and heating device uses the compressor, has the technical effects of the compressor, and details are not described herein.

[0137] The refrigeration and heating device of the embodiment of the present application can be a refrigeration-only device, such as a refrigerator, can be a heating-only device, or can be a device that takes into account both refrigeration and heating.

[0138] The above is only an optional embodiment of the present application, and does not limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An adaptive quasi-zero stiffness foot pad, characterized in that, The device includes a base with an open inner cavity, a shaft extending into the inner cavity through the open end, an end cap covering the open end, a magnetic attraction damping mechanism, and a magnetic repulsion damping mechanism. The end cap has a through hole for the other end of the shaft to extend out, and a vibration gap is formed between the inner wall of the through hole and the shaft to allow radial vibration of the shaft. The magnetic attraction damping mechanism includes a permanent magnet inner ring and a permanent magnet outer ring for magnetically attracting the outer periphery of the permanent magnet inner ring. The permanent magnet outer ring surrounds the permanent magnet inner ring, and the permanent magnet inner ring is mounted on the shaft. The magnetic repulsion damping mechanism... The vibration mechanism includes an inner magnetic ring mounted on the shaft core and an outer magnetic ring for generating a magnetic repulsive force on the inner magnetic ring in the direction toward the shaft core. The outer magnetic ring is arranged around the inner magnetic ring, and the inner magnetic ring and the outer magnetic ring are coaxially arranged. The outer magnetic ring is fixed on the base. The shaft core is made of a non-magnetic material. Both the inner and outer magnetic rings are radially magnetized, and the magnetization directions of the inner and outer magnetic rings are opposite. Both the permanent magnet inner ring and the permanent magnet outer ring are radially magnetized, and the magnetization directions of the inner and outer permanent magnet rings are the same.

2. The adaptive quasi-zero stiffness foot pad as described in claim 1, characterized in that, The magnetic repulsion damping mechanism is in multiple sets, and the multiple sets of magnetic repulsion damping mechanisms are arranged at intervals along the axial direction of the shaft core.

3. The adaptive quasi-zero stiffness foot pad as described in claim 2, characterized in that: The spacing between the inner and outer magnetic rings in two adjacent sets of magnetic repulsion damping mechanisms is not equal, or the spacing between the inner and outer magnetic rings in any two sets of magnetic repulsion damping mechanisms is not equal.

4. The adaptive quasi-zero stiffness foot pad as described in claim 1, characterized in that: The magnetic vibration damping mechanism is in multiple sets, and the multiple sets of magnetic vibration damping mechanisms are arranged at intervals along the axial direction of the shaft core.

5. The adaptive quasi-zero stiffness foot pad as described in claim 1, characterized in that: The magnetic attraction damping mechanism is provided at both ends along the axial direction of the shaft core, and the magnetic repulsion damping mechanism is provided at both ends.

6. The adaptive quasi-zero stiffness foot pad as described in claim 5, characterized in that: The spacing between the inner magnetic ring and the corresponding outer magnetic ring is not equal to the spacing between the inner permanent magnet ring and the corresponding outer permanent magnet ring.

7. The adaptive quasi-zero stiffness foot pad as described in any one of claims 1-6, characterized in that: When the shaft vibrates axially, the radial projection of one of the inner magnetic ring and the outer magnetic ring on the shaft always overlaps the radial projection of the other on the shaft.

8. The adaptive quasi-zero stiffness foot pad as described in any one of claims 1-6, characterized in that: The outer magnetic ring includes a plurality of first magnets arranged in a ring array, and the inner magnetic ring includes a plurality of second magnets arranged in a ring array; or, the outer magnetic ring includes at least one first annular magnet arranged along the axial direction of the shaft, and the inner magnetic ring includes at least one second annular magnet arranged along the axial direction of the shaft.

9. The adaptive quasi-zero stiffness foot pad as described in any one of claims 1-6, characterized in that: The permanent magnet outer ring includes a plurality of first magnetic bodies arranged in a ring array, and the permanent magnet inner ring includes a plurality of second magnetic bodies arranged in a ring array; or, the permanent magnet outer ring includes at least one first magnetic ring body arranged along the axial direction of the shaft, and the permanent magnet inner ring includes at least one second magnetic ring body arranged along the axial direction of the shaft.

10. The adaptive quasi-zero stiffness foot pad as described in any one of claims 1-6, characterized in that: A blind hole is provided on the bottom surface of the inner cavity, one end of the shaft extends into the blind hole, and a limiting gap is formed between the inner wall of the blind hole and the shaft to allow the shaft to vibrate radially.

11. The adaptive quasi-zero stiffness foot pad as described in any one of claims 1-6, characterized in that: The inner cavity has stepped grooves on its sidewalls for positioning and supporting the outer magnetic ring and the permanent magnet outer ring.

12. The adaptive quasi-zero stiffness foot pad as described in any one of claims 1-6, characterized in that: The base has a connecting shaft protruding from one end away from the end cap, and the connecting shaft is coaxial with the shaft core.

13. The adaptive quasi-zero stiffness foot pad as described in any one of claims 1-6, characterized in that: The shaft core is provided with a positioning structure that positions and fixes the inner magnetic ring and the permanent magnet inner ring on the shaft core. The outer diameter of the positioning structure near the end cover is larger than the inner diameter of the through hole.

14. A compressor, comprising a body, characterized in that: The body is equipped with adaptive quasi-zero stiffness foot pads as described in any one of claims 1-13.

15. A refrigeration and heating device, characterized in that: Includes the compressor as described in claim 14.

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