Negative stiffness damping foot pad, compressor and refrigeration and heating equipment

Abstract

The application provides a negative stiffness damping foot pad, a compressor and a refrigeration and heating equipment. The negative stiffness damping foot pad comprises a shell, a shaft core, an inner magnetic ring, an outer magnetic ring and a sheet spring. The shell is provided with an inner cavity. One end of the shaft core extends into the inner cavity. The other end of the shaft core is provided with a rubber pad for connecting a to-be-isolated object. The outer magnetic ring is arranged around the inner magnetic ring. The sheet spring supports the shaft core so that the inner magnetic ring and the outer magnetic ring are coaxially arranged. The negative stiffness damping foot pad of the application uses the coaxially arranged inner magnetic ring and outer magnetic ring to form a negative stiffness structure. In cooperation with the sheet spring and the rubber pad, when supporting the to-be-isolated object, the inner magnetic ring and the shaft core are always in an ideal balanced position with a dynamic stiffness close to zero along the axial direction, quasi-zero stiffness damping is formed, the isolation frequency range is wide, and the isolation effect is good. In addition, the sheet spring supports the shaft core and can also slow down the radial vibration and reduce the radial vibration conduction to the shell, that is, the sheet spring can also play a role in radial damping.

Description

Technical Field

[0001] This application belongs to the field of compressor technology, and more specifically, relates to a negative stiffness vibration damping pad, a compressor, and a refrigeration and heating device. Background Technology

[0002] In related technologies, a motor and a compression mechanism are installed inside the compressor casing. The motor drives the compression mechanism to compress gas. The bottom of the casing is equipped with feet to connect to a mounting bracket for household appliances, thus supporting the compressor on the bracket. During operation, both the motor and the compression mechanism generate vibrations. These vibrations are transmitted through the casing to the base plate and then to the mounting bracket, resulting in significant noise and vibration, and even the risk of resonance.

[0003] To attenuate the vibration energy generated by the compressor, existing compressor vibration damping systems mainly consist of rubber feet, sleeves, and bolts. The installation method involves inserting the compressor feet into the corresponding grooves of the rubber feet, and then using the compressor bolts to pass through the sleeves and secure the rubber feet to the mounting base. Both the bolts and sleeves, as well as the sleeves and feet, have clearance fits, thus achieving weak circumferential restraint. The bolts contact the top of the rubber feet, and the compressor feet are embedded in the corresponding grooves of the rubber feet, thus achieving weak axial restraint. This simultaneously attenuates both circumferential and axial vibration energy.

[0004] However, due to the limited gaps between the bolt and sleeve, and between the sleeve and rubber foot pad, and the relatively small compressibility of the lower cylindrical structure of the rubber foot pad, the attenuation of vibration energy in the circumferential and axial directions of the compressor is limited, resulting in still significant vibration during actual operation. During high-frequency, severe compressor vibration, the foot pad may become crushed under the influence of circumferential and tangential forces. In this case, the vibration energy is directly transmitted to the mounting base, leading to excessive noise and vibration. Furthermore, traditional compressor foot pads have a relatively high effective vibration isolation frequency, resulting in insufficient vibration isolation. Summary of the Invention

[0005] The purpose of this application is to provide a negative stiffness vibration damping foot pad, a compressor, and a refrigeration and heating device to solve the problem that the existing compressor foot pads have a high vibration isolation frequency and insufficient vibration isolation effect. In particular, when the compressor vibrates at high frequency and violently, the foot pad may be crushed and the vibration energy may be directly transmitted to the mounting base.

[0006] To achieve the above objectives, the technical solution adopted in this application embodiment is as follows: a negative stiffness vibration damping pad is provided, including a shell, a shaft core, an inner magnetic ring, an outer magnetic ring, and a leaf spring. The shell has an inner cavity, one end of which is open. One end of the shaft core extends into the inner cavity through the open end. A rubber pad for connecting the object to be isolated is installed on the other end of the shaft core. The inner magnetic ring is installed on the shaft core, and the outer magnetic ring is installed in the inner cavity, with the outer magnetic ring surrounding the inner magnetic ring. The leaf spring supports the shaft core so that the inner magnetic ring and the outer magnetic ring are coaxially arranged. The leaf spring is installed on the shell.

[0007] In one alternative embodiment, the rubber pad includes a rubber sleeve for connecting the object to be isolated and a support pad for supporting the rubber sleeve, the support pad being mounted on the shaft core.

[0008] In one alternative embodiment, an annular groove for positioning and connecting the object to be isolated is formed on the outer circumferential surface of the rubber sleeve.

[0009] In one optional embodiment, the support pad has a positioning hole, and the other end of the shaft has a positioning head protruding from it, which is inserted into the positioning hole.

[0010] In one alternative embodiment, the shaft core is provided with a support platform, and the support pad is mounted on the support platform.

[0011] In one alternative embodiment, the leaf spring is a cross-shaped spring.

[0012] In one optional embodiment, both the inner magnetic ring and the outer magnetic ring are radiatively magnetized, and the magnetization directions of the inner magnetic ring and the outer magnetic ring are the same.

[0013] In one alternative embodiment, 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 ring magnet arranged along the axial direction of the core, and the inner magnetic ring includes at least one second ring magnet arranged along the axial direction of the core.

[0014] In an alternative embodiment, the leaf spring includes a first spring and a second spring for cooperating to limit the travel of the shaft core, with the inner magnetic ring and the outer magnetic ring both located between the first spring and the second spring.

[0015] In an optional embodiment, the shaft core is fitted with a first bushing and a second bushing for cooperating and positioning the inner magnetic ring. The first bushing is disposed between the inner magnetic ring and the first spring, and the second bushing is disposed between the inner magnetic ring and the second spring.

[0016] In an optional embodiment, the shaft core is provided with a boss, which cooperates with the first bushing to clamp the first spring.

[0017] In one optional embodiment, the housing includes a support, a ring cap mounted on one end of the support, and an end cap mounted on the other end of the support. The support has an opening, and the outer magnetic ring is placed in the opening. A support ring protrudes from the inner surface of the opening. The support ring and the ring cap cooperate to clamp the outer magnetic ring. The end cap has a groove for the shaft core to extend into. The leaf spring is installed between the end cap and the support. The leaf spring is installed on the end of the ring cap facing away from the end cap.

[0018] In one alternative embodiment, a first deformation groove is provided on the end of the support away from the ring cover for the sheet spring to deform and move, and / or, a second deformation groove is provided on the end of the ring cover away from the support for the sheet spring to deform and move.

[0019] In an optional embodiment, the end cap away from the support has a connecting shaft protruding from it, and the connecting shaft is coaxial with the shaft core.

[0020] Another objective of this application is to provide a compressor, including a body, on which negative stiffness vibration damping pads as described in any of the above embodiments are installed.

[0021] Another objective of this application is to provide a refrigeration and heating device, including a compressor as described in any of the above embodiments.

[0022] The beneficial effects of the negative stiffness vibration damping pads provided in this application embodiment are as follows: Compared with the prior art, the negative stiffness vibration damping pads in this application embodiment, by using coaxially arranged inner and outer magnetic rings to form a negative stiffness structure, in conjunction with the plate spring and rubber pad, when supporting the object to be isolated, have very low stiffness, close to zero, when the axial mid-surface of the inner magnetic ring is near the axial mid-surface of the outer magnetic ring; under the action of the plate spring and the outer magnetic ring, the inner magnetic ring and the shaft core are always in an ideal equilibrium position with dynamic stiffness close to zero along the axial direction, forming quasi-zero stiffness vibration damping, with a wide vibration isolation frequency range and good vibration isolation effect; in addition, the use of plate springs to support the shaft core can also slow down radial vibration and reduce the transmission of radial vibration to the outer shell, that is, it can also play a radial vibration damping role, and the rubber pad is set to facilitate the connection of the object to be isolated, and at the same time can also play a certain vibration damping buffering role, improving the vibration damping effect.

[0023] The beneficial effects of the compressor provided in this application embodiment are as follows: Compared with the prior art, the compressor in this application embodiment uses the negative stiffness vibration damping pads of the above embodiment, which has the technical effects of the above negative stiffness vibration damping pads. It not only has a good vibration isolation effect at low frequencies, but also achieves good vibration reduction when the compressor vibrates violently at high frequencies.

[0024] The beneficial effects of the refrigeration and heating equipment provided in this application embodiment are as follows: Compared with the prior art, the refrigeration and heating equipment in this application embodiment uses the compressor of the above embodiment and has the technical effects of the above compressor, which will not be repeated here. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or exemplary technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a cross-sectional structural schematic diagram of the negative stiffness vibration damping pad provided in Embodiment 1 of this application;

[0027] Figure 2 A three-dimensional structural diagram of the negative stiffness vibration damping pad provided in Embodiment 1 of this application;

[0028] Figure 3 This is a schematic diagram of the structure of the outer magnetic ring provided in Embodiment 1 of this application;

[0029] Figure 4 This is a schematic diagram of the structure of the inner magnetic ring provided in Embodiment 1 of this application;

[0030] Figure 5 This is a cross-sectional structural schematic diagram of the negative stiffness vibration damping foot pad provided in Embodiment 2 of this application;

[0031] Figure 6 This is a schematic diagram of the structure of the outer magnetic ring provided in Embodiment 2 of this application;

[0032] Figure 7 This is a schematic diagram of the structure of the first chuck provided in Embodiment 2 of this application;

[0033] Figure 8 This is a schematic diagram of the structure of the inner magnetic ring provided in Embodiment 2 of this application;

[0034] Figure 9 This is a cross-sectional structural schematic diagram of the negative stiffness vibration damping pad provided in Embodiment 3 of this application;

[0035] Figure 10This is a schematic diagram of the structure of the outer magnetic ring provided in Embodiment 3 of this application;

[0036] Figure 11 This is a schematic diagram of the structure of the inner magnetic ring provided in Embodiment 3 of this application;

[0037] Figure 12 This is a schematic diagram of the structure of the outer magnetic ring provided in Embodiment 4 of this application;

[0038] Figure 13 This is a schematic diagram of the structure of the outer magnetic ring provided in Embodiment 5 of this application;

[0039] Figure 14 This is a schematic diagram of the structure of the inner magnetic ring provided in Embodiment Six of this application;

[0040] Figure 15 This is a schematic diagram of the structure of the inner magnetic ring provided in Embodiment 7 of this application.

[0041] The main markings in the attached figures are as follows:

[0042] 100-Negative stiffness vibration damping pad;

[0043] 10-Shaft core; 11-Boss; 12-Positioning head; 13-Support platform; 14-First bushing; 15-Second bushing;

[0044] 20-Outer shell; 201-Inner cavity; 21-Support; 211-Opening; 212-Support ring; 213-First deformation groove; 22-Ring cover; 221-Hollow part; 222-Second deformation groove; 23-End cover; 231-Groove; 232-Connecting shaft;

[0045] 30-Outer magnetic ring; 31-First magnet; 32-First chuck; 321-First support plate; 322-First positioning block; 3221-First deformation cavity; 320-First positioning groove; 33-First annular magnet; 34-First adapter;

[0046] 40-Inner magnetic ring; 41-Second magnet; 42-Second chuck; 421-Second support plate; 422-Second positioning block; 4221-Second deformation cavity; 420-Second positioning groove; 43-Second annular magnet; 44-Second adapter;

[0047] 50 - Leaf spring; 51 - First spring; 52 - Second spring;

[0048] 60-Rubber pad; 61-Support pad; 611-Positioning hole; 62-Rubber sleeve; 621-Annular groove. Detailed Implementation

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] In this specification, references to "one embodiment," "some embodiments," or simply "embodiment" mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. Furthermore, in one or more embodiments, specific features, structures, or characteristics may be combined in any suitable manner.

[0054] Please see Figure 1 and Figure 2 The negative stiffness vibration damping pad 100 provided in this application will now be described. The negative stiffness vibration damping pad 100 includes a housing 20, a shaft core 10, an inner magnetic ring 40, an outer magnetic ring 30, a leaf spring 50, and a rubber pad 60. The housing 20 has an inner cavity 201, and one end of the inner cavity 201 is open, with one end of the shaft core 10 extending into the inner cavity 201.

[0055] The inner magnetic ring 40 is mounted on the shaft core 10, which supports the inner magnetic ring 40, and the inner magnetic ring 40 and the shaft core 10 are coaxially arranged. A leaf spring 50 is mounted on the outer casing 20, which supports the leaf spring 50. The shaft core 10 is connected to the leaf spring 50, thereby movably supporting the shaft core 10 within the inner cavity 201 of the outer casing 20, and consequently, movably supporting the inner magnetic ring 40 within the inner cavity 201 of the outer casing 20.

[0056] The outer magnetic ring 30 is mounted on the outer shell 20 and is installed in the inner cavity 201, thereby supporting the outer magnetic ring 30 through the outer shell 20.

[0057] The outer magnetic ring 30 is arranged around the inner magnetic ring 40, so that the inner magnetic ring 40 and the outer magnetic ring 30 can cooperate to form a vibration damping structure, which can isolate axial high-frequency severe vibration.

[0058] The shaft core 10 and the outer magnetic ring 30 are coaxially arranged, meaning the leaf spring 50 supports the shaft core 10 at the center of the outer magnetic ring 30, ensuring coaxiality between them. Similarly, the shaft core 10 is coaxial with the inner magnetic ring 40, allowing the inner magnetic ring 40 to be coaxial with the outer magnetic ring 30. This balances the circumferential magnetic force on the inner magnetic ring 40 from the outer magnetic ring 30. Alternatively, the leaf spring 50 can be used to position the inner magnetic ring 40 while supporting the shaft core 10, ensuring coaxiality between them. A slight deviation between the central axis of the shaft core 10 and the central axis of the inner magnetic ring 40 is permissible, also balancing the circumferential magnetic force on the inner magnetic ring 40 from the outer magnetic ring 30.

[0059] Since the leaf spring 50 supports the shaft core 10, the shaft core 10 can move axially in the inner cavity 201, and the leaf spring 50 can also play a reset role. In addition, the magnetic force of the outer magnetic ring 30 on the inner magnetic ring 40 can also cause the inner magnetic ring 40 to drive the shaft core 10 to reset.

[0060] In addition, the leaf spring 50 supports the shaft core 10. When the shaft core 10 vibrates radially, the leaf spring 50 can also play a certain buffering role, preventing the shaft core 10 from directly contacting the outer shell 20, thereby preventing the radial vibration of the shaft core 10 from being directly transmitted to the outer shell 20, and playing a certain radial vibration reduction role.

[0061] A rubber pad 60 is mounted on the shaft core 10, and the rubber pad 60 is located at the end of the shaft core 10 that extends out of the inner cavity 201. The rubber pad 60 is provided so that it can be easily connected to the object to be isolated by means of its elastic deformation. Moreover, the elastic deformation of the rubber pad 60 can play a certain role in buffering and damping the vibration of the object to be isolated, thereby improving the vibration isolation effect.

[0062] The inner magnetic ring 40 and the outer magnetic ring 30 are coaxially arranged, forming a negative stiffness structure. When the axial mid-plane of the inner magnetic ring 40 coincides with the axial mid-plane of the outer magnetic ring 30, that is, when the inner magnetic ring 40 is located at the axial mid-position of the outer magnetic ring 30, the two ends of the inner magnetic ring 40 are balanced by the magnetic force of the outer magnetic ring 30. Near this equilibrium point, the stiffness of the vibration damping structure formed by the inner magnetic ring 40 and the outer magnetic ring 30 is very small, close to zero. In use, the object to be isolated is installed on the rubber pad 60. Through the combined action of the negative stiffness structure formed by the inner magnetic ring 40 and the outer magnetic ring 30, the rubber pad 60, and the leaf spring 50, the axial mid-plane of the inner magnetic ring 40 can be located near the axial mid-plane of the outer magnetic ring 30. This ensures that the inner magnetic ring 40 and the shaft core 10 are always in an ideal equilibrium position with dynamic stiffness close to zero along the axial direction, achieving quasi-zero stiffness vibration damping. According to the principle of vibration reduction, the closer the stiffness is to zero, the wider the effective frequency range of vibration isolation, the lower the effective frequency, and the better the vibration isolation effect. This ensures that the negative stiffness vibration damping pad 100 has a good vibration damping effect on both low-frequency and high-frequency vibrations, guaranteeing its excellent vibration reduction performance.

[0063] The term "nearby" refers to the following: the axial mid-surface of the inner magnetic ring 40 coincides with the axial mid-surface of the outer magnetic ring 30, and the distance between the axial mid-surface of the inner magnetic ring 40 and the axial mid-surface of the outer magnetic ring 30 is very small. In other words, it is ideal for the axial mid-surface of the inner magnetic ring 40 and the axial mid-surface of the outer magnetic ring 30 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.

[0064] Compared with the prior art, the negative stiffness vibration damping pad 100 provided in this application embodiment forms a negative stiffness structure by using an inner magnetic ring 40 and an outer magnetic ring 30 arranged coaxially. In conjunction with the leaf spring 50 and the rubber pad 60, when supporting the object to be isolated, the stiffness is very small, close to zero, when the axial mid-surface of the inner magnetic ring 40 is near the axial mid-surface of the outer magnetic ring 30. Under the action of the leaf spring 50 and the outer magnetic ring 30, the inner magnetic ring 40 and the shaft core 10 are always in an ideal equilibrium position with dynamic stiffness close to zero along the axial direction, forming quasi-zero stiffness vibration damping, with a wide vibration isolation frequency range and good vibration isolation effect. In addition, the leaf spring 50 supports the shaft core 10, and the leaf spring 50 can also slow down radial vibration and reduce the transmission of radial vibration to the outer shell 20, thus also playing a radial vibration damping role. The rubber pad 60 is provided to facilitate connection with the object to be isolated and also plays a certain role in vibration damping and buffering, improving the vibration damping effect. The axial mid-surface of the inner magnetic ring 40 refers to the surface that passes through the center of the axial direction of the inner magnetic ring 40 and is perpendicular to the axial direction of the inner magnetic ring 40. The axial mid-surface of the outer magnetic ring 30 refers to the surface that passes through the center of the axial direction of the outer magnetic ring 30 and is perpendicular to the axial direction of the outer magnetic ring 30.

[0065] In one embodiment, see Figure 1 and Figure 2 The rubber pad 60 includes a rubber sleeve 62 and a support pad 61. The rubber sleeve 62 is mounted on the support pad 61 and supported by the support pad 61. The rubber sleeve 62 is designed to be more easily deformable, facilitating connection to the object to be isolated. Additionally, the rubber sleeve 62 also provides some radial vibration damping. The support pad 61 not only supports the rubber sleeve 62 but also facilitates connection to the shaft core 10, making the connection more convenient and stable.

[0066] In one embodiment, an annular groove 621 is provided on the outer peripheral surface of the rubber sleeve 62. This allows the connecting part of the object to be isolated to be inserted into the annular groove 621 for positioning during assembly and use, facilitating the connection between the rubber sleeve 62 and the object to be isolated.

[0067] In one embodiment, the annular groove 621 is disposed adjacent to the support pad 61, so that when the object to be isolated is connected, the support pad 61 can support the object to be isolated.

[0068] In one embodiment, the support pad 61 is provided with a positioning hole 611, and the other end of the shaft core 10 is provided with a positioning head 12. The positioning head 12 is inserted into the positioning hole 611 to position the support pad 61, so as to facilitate the installation of the support pad 61 on the shaft core 10.

[0069] In one embodiment, a support platform 13 is provided on the shaft core 10, and a support pad 61 is mounted on the support platform 13. The support platform is provided to facilitate the installation and fixing of the support pad 61, and to provide more stable support for the support pad 61, thereby supporting the object to be isolated from vibration.

[0070] In one embodiment, see Figure 1 , Figure 3 and Figure 4 The outer magnetic ring 30 is radially magnetized, meaning it is magnetized radially outward from its central axis. In other words, the polarity of the inner radial side of the outer magnetic ring 30 is opposite to that of the outer radial side. Similarly, the inner magnetic ring 40 is radially magnetized, meaning it is magnetized radially outward from its central axis. Again, the polarity of the inner radial side of the inner magnetic ring 40 is opposite to that of the outer radial side.

[0071] The inner magnetic ring 40 and the outer magnetic ring 30 are magnetized in the same direction, that is, both the inner magnetic ring 40 and the outer magnetic ring 30 are magnetized radially outward from the central axis, or both the inner magnetic ring 40 and the outer magnetic ring 30 are magnetized from the outside of the ring inward. In other words, when the inner radial side or inner circumference of the inner magnetic ring 40 is the N pole and the outer radial side or outer circumference of the inner magnetic ring 40 is the S pole, the inner radial side or inner circumference of the outer magnetic ring 30 is the N pole and the outer radial side or outer circumference of the outer magnetic ring 30 is the S pole; or, when the inner radial side or inner circumference of the inner magnetic ring 40 is the S pole and the outer radial side or outer circumference of the inner magnetic ring 40 is the N pole, the inner radial side or inner circumference of the outer magnetic ring 30 is the S pole and the outer radial side or outer circumference of the outer magnetic ring 30 is the N pole, the inner magnetic ring 40 and the outer magnetic ring 30 attract each other under the action of their respective magnetic fields. Thus, when the vibration is transmitted to the shaft core 10 and pushes the shaft core 10 to move axially, the attraction between the inner magnetic ring 40 and the outer magnetic ring 30 reduces the vibration and plays a role in damping.

[0072] In one embodiment, see Figure 1 and Figure 3 The outer magnetic ring 30 includes multiple first magnets 31. Each first magnet 31 is a permanent magnet, meaning it is made of permanent magnet material. The multiple first magnets 31 are arranged in a ring array to form a ring structure. Using multiple first magnets 31 facilitates manufacturing and is particularly convenient for radiation magnetization.

[0073] In one embodiment, each of the first magnets 31 is fan-shaped, which facilitates the combination of multiple first magnets 31 to form a ring structure. It is understood that each of the first magnets 31 can also be set in other shapes, such as cuboids, for ease of manufacturing, and multiple first magnets 31 can be arranged in a ring array.

[0074] In one embodiment, see Figure 1 and Figure 4The inner magnetic ring 40 includes multiple second magnets 41. Each second magnet 41 is a permanent magnet, meaning it is made of permanent magnet material. The multiple second magnets 41 are arranged in a ring array to form a ring structure. Using multiple second magnets 41 facilitates manufacturing and is particularly convenient for radiation magnetization.

[0075] In one embodiment, each of the second magnets 41 is fan-shaped, which facilitates the combination of multiple second magnets 41 to form a ring structure. It is understood that each of the second magnets 41 can also be set in other shapes, such as cuboids, for ease of manufacturing, and multiple second magnets 41 can be arranged in a ring array.

[0076] In one embodiment, when the outer magnetic ring 30 includes a plurality of first magnets 31 arranged in a ring and the inner magnetic ring 40 includes a plurality of second magnets 41 arranged in a ring, the number of circumferential first magnets 31 and second magnets 41 can be increased or decreased according to the amplitude of the supported object to be isolated (such as a supported compressor), thereby adjusting the interaction force between the inner magnetic ring 40 and the outer magnetic ring 30 to achieve the optimal axial vibration reduction effect of the negative stiffness vibration damping pad 100.

[0077] In one embodiment, see Figure 1 and Figure 2 In one embodiment, the leaf spring 50 may be a cross-shaped spring to ensure that the leaf spring 50 can stably and well support the shaft core 10 and move axially with the shaft core 10. Additionally, using a cross-shaped spring results in a smaller size, allowing the negative stiffness damping pad 100 to be manufactured in a smaller form. Understandably, the leaf spring 50 may also employ other spring shapes, such as a helical flat spring.

[0078] In one embodiment, the leaf spring 50 can be made of a non-magnetic material, such as a non-magnetic metal material (e.g., copper) or a non-magnetic non-metallic material (e.g., plastic), to ensure that the leaf spring 50 has good stiffness and can stably support the shaft core 10 without affecting the interaction of the magnetic fields generated by the inner magnetic ring 40 and the outer magnetic ring 30.

[0079] In one embodiment, see Figure 1 and Figure 2The outer casing 20 includes a support 21, a ring cap 22, and an end cap 23. The support 21 has an opening 211, and the end cap 23 has a groove 231. The ring cap 22 and end cap 23 are respectively installed at both ends of the support 21. The groove 231 is located at the end of the end cap 23 closest to the support 21, and the opening 211 communicates with the groove 231. Thus, the hollow portion 221 of the ring cap 22, the opening 211 of the support 21, and the groove 231 of the end cap 23 form the inner cavity 201 of the outer casing 20. The support 21 has a support ring 212, which protrudes inward from the inner surface of the opening 211. This support ring 212 can be used to position and support the outer magnetic ring 30 during installation. The ring cap 22 is installed on the support 21, and the ring cap 22 and the support ring 212 cooperate to clamp the outer magnetic ring 30, thereby positioning and fixing the outer magnetic ring 30. The opening 211 is connected to the groove 231. When the shaft 10 moves in the opening 211, it can extend into the groove 231 to ensure that the shaft 10 has a sufficient travel.

[0080] In one embodiment, a leaf spring 50 is installed between the end cap 23 and the support 21. The leaf spring 50 is clamped and fixed by the cooperation between the end cap 23 and the support 21, so as to install and fix the leaf spring 50. The leaf spring 50 supports and positions the shaft core 10. It can be understood that the leaf spring 50 can also be fixed directly in the support 21.

[0081] In one embodiment, a leaf spring 50 is installed at the end of the ring cover 22 away from the end cover 23, that is, a leaf spring 50 is installed at the end of the ring cover 22 facing away from the end cover 23, so as to install the leaf spring 50 and support and position the shaft core 10 by means of the leaf spring 50.

[0082] In one embodiment, a leaf spring 50 is installed between the end cap 23 and the support 21, and a leaf spring 50 is installed at the end of the ring cap 22 away from the end cap 23. In this way, the two leaf springs 50 cooperate to support and position the shaft core 10, so as to more stably support the shaft core 10 in the inner cavity 201 of the housing 20 and better play the role of vibration reduction. Furthermore, the two leaf springs 50 are located at both ends of the support 21, which can also limit the stroke of the shaft core 10 along the axial direction.

[0083] In one embodiment, the depth of the groove 231 in the end cap 23 is greater than the axial movement of the shaft core 10 along the opening 211. This ensures that the shaft core 10 has sufficient movement to prevent it from contacting the end cap 23 during intense vibration, thus providing better vibration isolation.

[0084] In one embodiment, when a leaf spring 50 is installed between the end cap 23 and the support 21, a first deformation groove 213 is provided on the end of the support 21 away from the ring cap 22. In this way, when the shaft core 10 moves, the leaf spring 50 moves with the shaft core 10, and the first deformation groove 213 can serve as the deformation space of the leaf spring 50 to avoid blocking the leaf spring 50 and to avoid affecting the deformation of the leaf spring 50.

[0085] In one embodiment, when a leaf spring 50 is installed at the end of the ring cover 22 away from the end cover 23, a second deformation groove 222 is provided at the end of the ring cover 22 away from the support 21. In this way, when the shaft core 10 moves, the leaf spring 50 moves with the shaft core 10, and the second deformation groove 222 can serve as the deformation space of the leaf spring 50 to avoid blocking the leaf spring 50 and to avoid affecting the deformation of the leaf spring 50.

[0086] In one embodiment, the end cap 23 is provided with a connecting shaft 232, which is located at the end of the end cap 23 away from the support 21, and is coaxially arranged with the shaft core 10. The connecting shaft 232 is provided to facilitate connection to an external mounting base when using the negative stiffness vibration damping pad 100. Furthermore, coaxial arrangement of the connecting shaft 232 with the shaft core 10 provides better vibration damping.

[0087] In one embodiment, see Figure 1 and Figure 2 The outer shell 20 is a non-magnetic shell, that is, the outer shell 20 is made of non-magnetic materials, such as aluminum alloy. The outer shell 20 can also be made of non-magnetic and non-metallic materials, such as plastic or ceramic, to ensure that the outer shell 20 has good rigidity and high load capacity, and will not affect the interaction of the magnetic fields generated by the inner magnetic ring 40 and the outer magnetic ring 30.

[0088] In one embodiment, when the housing 20 includes a ring cover 22, a support 21, and an end cover 23, the ring cover 22, the support 21, and the end cover 23 are all made of non-magnetic materials to ensure that the housing 20 has good rigidity and high load capacity, and will not affect the interaction of the magnetic fields generated by the inner magnetic ring 40 and the outer magnetic ring 30.

[0089] In one embodiment, the ring cover 22, the support 21, and the end cover 23 can be fixedly connected by screws, which is a secure and convenient connection. Of course, the ring cover 22, the support 21, and the end cover 23 can also be fixedly connected by other methods, such as welding.

[0090] 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, such as aluminum alloy. The shaft core 10 can also be made of a non-magnetic and non-metallic material (such as plastic, ceramic, etc.) to ensure that the shaft core 10 has good rigidity and high load capacity, and will not affect the interaction of the magnetic fields generated by the inner magnetic ring 40 and the outer magnetic ring 30.

[0091] In one embodiment, see Figure 1 and Figure 2 The leaf spring 50 includes a first spring 51 and a second spring 52, which are respectively connected to the shaft core 10. The first spring 51 and the second spring 52 work together to support the shaft core 10 more stably. An inner magnetic ring 40 is located between the first spring 51 and the second spring 52, and an outer magnetic ring 30 is located between the first spring 51 and the second spring 52. The first spring 51 and the second spring 52 work together to limit the travel of the shaft core 10.

[0092] In one embodiment, when a leaf spring 50 is installed at the end of the ring cover 22 away from the end cover 23, and a leaf spring 50 is installed between the end cover 23 and the support 21, the two leaf springs 50 can be a first spring 51 and a second spring 52, that is, the leaf spring 50 at the end of the ring cover 22 away from the end cover 23 is the first spring 51, and the leaf spring 50 between the end cover 23 and the support 21 is the second spring 52.

[0093] In one embodiment, the shaft core 10 is provided with a first bushing 14 and a second bushing 15. The first bushing 14 is disposed between the inner magnetic ring 40 and the first spring 51, and the second bushing 15 is disposed between the inner magnetic ring 40 and the second spring 52. The first bushing 14 and the second bushing 15 are used to cooperate in positioning the inner magnetic ring 40 so as to fix the inner magnetic ring 40 on the shaft core 10.

[0094] In one embodiment, the first bushing 14 is made of a non-magnetic material, such as a non-magnetic metal material (e.g., aluminum alloy, copper, etc.), or it can be made of a non-magnetic and non-metallic material (e.g., plastic, ceramic, etc.) to ensure that the first bushing 14 has good rigidity and high load capacity, and will not affect the interaction of the magnetic fields generated by the inner magnetic ring 40 and the outer magnetic ring 30.

[0095] In one embodiment, the second bushing 15 is made of a non-magnetic material, such as a non-magnetic metal material (e.g., aluminum alloy, copper, etc.), or it can be made of a non-magnetic and non-metallic material (e.g., plastic, ceramic, etc.) to ensure that the second bushing 15 has good rigidity and high load capacity, and will not affect the interaction of the magnetic fields generated by the inner magnetic ring 40 and the outer magnetic ring 30.

[0096] In one embodiment, the shaft core 10 is provided with a boss 11, which cooperates with the first bushing 14 to clamp the first spring 51, so as to position and fix the first spring 51. In addition, since the second bushing 15 is located between the inner magnetic ring 40 and the second spring 52, the first spring 51, the first bushing 14, the inner magnetic ring 40 and the second bushing 15 can be positioned by the boss 11.

[0097] Understandably, a locking element, such as a nut, can also be provided on the shaft core 10 to cooperate with the second bushing 15 to clamp and fix the second spring 52, and then the locking element cooperates with the boss 11 to position the first spring 51, the first bushing 14, the inner magnetic ring 40 and the second bushing 15.

[0098] In one embodiment, the boss 11 and the shaft core 10 are integrally formed to facilitate manufacturing. Understandably, the boss 11 is also manufactured separately and then fixed to the shaft core 10.

[0099] In one embodiment, see Figure 5 , Figure 6 and Figure 7 The outer magnetic ring 30 includes a plurality of first magnets 31 and a first chuck 32. The plurality of first magnets 31 are arranged in a ring array to form a ring structure. Each first magnet 31 is mounted on the first chuck 32, which supports and fixes each first magnet 31 to facilitate the installation and fixation of the plurality of first magnets 31. It can be understood that each first magnet 31 can also be directly mounted on the outer casing 20.

[0100] In one embodiment, the first chuck 32 includes a first support plate 321 and a plurality of first positioning blocks 322. The plurality of first positioning blocks 322 are disposed on the first support plate 321 and arranged in a circular array. A first positioning groove 320 is formed between two adjacent first positioning blocks 322. Thus, when installing the first magnet 31, the end of the first magnet 31 can be inserted into the first positioning groove 320 to fix the first magnet 31.

[0101] In one embodiment, the outer magnetic ring 30 includes two first chucks 32, which are arranged facing each other. When assembling the first magnet 31, the opposite ends of the first magnet 31 can be installed in the first positioning grooves 320 corresponding to the two first chucks 32, that is, each end of the first magnet 31 can be installed in the first positioning grooves 320 of the adjacent first chucks 32, so as to better fix each first magnet 31.

[0102] In one embodiment, each first positioning block 322 is provided with a first deformation cavity 3221. When the first magnet 31 is installed, when the end of the first magnet 31 is inserted into the first positioning groove 320 between two adjacent first positioning blocks 322, the first positioning block 322 can deform so that the end of the first magnet 31 is fixed in the corresponding first positioning groove 320, and the two adjacent first positioning blocks 322 can cooperate more stably to clamp the first magnet 31.

[0103] In one embodiment, each first positioning block 322 is U-shaped, with both ends of the U-shape connected to the first support disk 321, thereby forming a first deformation cavity 3221 inside the U-shaped first positioning block 322, which also facilitates processing, manufacturing, and assembly. It is understood that the first positioning block 322 can also be configured as a hollow structure, so that the first deformation cavity 3221 is formed inside the first positioning block 322.

[0104] In one embodiment, the first chuck 32 is made of a non-magnetic material, such as a non-magnetic metal material (e.g., aluminum alloy, copper, etc.), or it can be made of a non-magnetic and non-metallic material (e.g., plastic, ceramic, etc.) to ensure that the first chuck 32 has good rigidity and high load capacity, and does not affect the interaction of the magnetic fields generated by the inner magnetic ring 40 and the outer magnetic ring 30.

[0105] In one embodiment, see Figure 5 and Figure 8 The inner magnetic ring 40 includes a plurality of second magnets 41 and a second chuck 42. The plurality of second magnets 41 are arranged in a ring array to form a ring structure. Each second magnet 41 is mounted on the second chuck 42, which supports and fixes each second magnet 41 to facilitate the installation and fixation of the plurality of second magnets 41. It can be understood that each second magnet 41 can also be directly mounted on the outer casing 20.

[0106] In one embodiment, the second chuck 42 includes a second support disk 421 and a plurality of second positioning blocks 422. The plurality of second positioning blocks 422 are disposed on the second support disk 421 and arranged in a circular array. A second positioning groove 420 is formed between two adjacent second positioning blocks 422. Thus, when installing the second magnet 41, the end of the second magnet 41 can be inserted into the second positioning groove 420 to fix the second magnet 41.

[0107] In one embodiment, the inner magnetic ring 40 includes two second chucks 42, which are arranged facing each other. When assembling the second magnet 41, the opposite ends of the second magnet 41 can be installed in the corresponding second positioning grooves 420 of the two second chucks 42, that is, each end of the second magnet 41 can be installed in the second positioning grooves 420 of the adjacent second chucks 42, so as to better fix each second magnet 41.

[0108] In one embodiment, each second positioning block 422 is provided with a second deformation cavity 4221. When the second magnet 41 is installed, when the end of the second magnet 41 is inserted into the second positioning groove 420 between two adjacent second positioning blocks 422, the second positioning block 422 can deform so that the end of the second magnet 41 is fixed in the corresponding second positioning groove 420, and the two adjacent second positioning blocks 422 can more stably cooperate to clamp the second magnet 41.

[0109] In one embodiment, each second positioning block 422 is U-shaped, with both ends of the U-shape connected to the second support disk 421, thereby forming a second deformation cavity 4221 inside the U-shaped second positioning block 422, which also facilitates processing, manufacturing, and assembly. It is understood that the second positioning block 422 can also be configured as a hollow structure, so that the second deformation cavity 4221 is formed inside the second positioning block 422.

[0110] In one embodiment, the second chuck 42 is made of a non-magnetic material, such as a non-magnetic metal material (e.g., aluminum alloy, copper, etc.), or it can be made of a non-magnetic and non-metallic material (e.g., plastic, ceramic, etc.) to ensure that the second chuck 42 has good rigidity and high load capacity, and does not affect the interaction of the magnetic fields generated by the inner magnetic ring 40 and the outer magnetic ring 30.

[0111] In one embodiment, see Figure 9 and Figure 10 The outer magnetic ring 30 includes at least one first annular magnet 33, which is made of a permanent magnet arranged in a ring shape. When there are multiple first annular magnets 33, the multiple first annular magnets 33 are arranged along the axial direction of the core 10, and each first annular magnet 33 is installed in the outer casing 20, generating a magnetic force on the inner magnetic ring 40 through the first annular magnets 33. The use of first annular magnets 33 in the outer magnetic ring 30 not only facilitates the installation of the outer magnetic ring 30 in the outer casing 20 and makes assembly easier, but also allows for easy adjustment of the number of first annular magnets 33 to adjust the magnetic force of the outer magnetic ring 30, thereby adjusting the magnetic force of the outer magnetic ring 30 on the inner magnetic ring 40.

[0112] In one embodiment, see Figure 9 and Figure 11The inner magnetic ring 40 includes at least one second annular magnet 43, which is made of a permanent magnet arranged in a ring shape. When there are multiple second annular magnets 43, they are arranged along the axial direction of the shaft core 10, and each second annular magnet 43 is mounted on the shaft core 10. The second annular magnets 43 generate a magnetic force on the outer magnetic ring 30. The use of second annular magnets 43 in the inner magnetic ring 40 not only facilitates the mounting of the inner magnetic ring 40 on the shaft core 10 and makes assembly easier, but also allows for easy adjustment of the number of second annular magnets 43 to adjust the magnetic force of the inner magnetic ring 40, thereby adjusting the magnetic force of the inner magnetic ring 40 on the outer magnetic ring 30.

[0113] In one embodiment, see Figure 9 , Figure 10 and Figure 11 The outer magnetic ring 30 includes a first annular magnet 33, while the inner magnetic ring 40 includes a second annular magnet 43. This allows for easy adjustment of the interaction force between the first annular magnet 33 and the second annular magnet 43, thereby adjusting the magnetic interaction force between the inner magnetic ring 40 and the outer magnetic ring 30. This, in turn, adjusts the stiffness performance of the negative stiffness vibration damping pad 100 to adapt to objects of different weights and vibration amplitudes.

[0114] In one embodiment, see Figure 9 , Figure 10 and Figure 11 The first annular magnet 33 is radially magnetized, meaning the polarity of its inner radial side is opposite to that of its outer radial side. Therefore, the outer magnetic ring 30 is also radially magnetized, meaning it is magnetically magnetized radiating outwards from its central axis; that is, the polarity of its outer radial side is opposite to that of its outer radial side. Similarly, the second annular magnet 43 is radially magnetized, meaning the polarity of its inner radial side is opposite to that of its outer radial side. Therefore, the inner magnetic ring 40 is also radially magnetized, meaning it is magnetically magnetized radiating outwards from its central axis; that is, the polarity of its inner radial side is opposite to that of its outer radial side.

[0115] If the first annular magnet 33 and the second annular magnet 43 are magnetized in the same direction, then the inner magnetic ring 40 and the outer magnetic ring 30 are magnetized in the same direction. That is, both the inner magnetic ring 40 and the outer magnetic ring 30 are magnetized radially outward from the central axis, or both the inner magnetic ring 40 and the outer magnetic ring 30 are magnetized from the outside of the ring inward. In other words, when the inner radial side or inner circumference of the inner magnetic ring 40 is the N pole and the outer radial side or outer circumference of the inner magnetic ring 40 is the S pole, the inner radial side or inner circumference of the outer magnetic ring 30 is the N pole and the outer radial side or outer circumference of the outer magnetic ring 30 is the S pole; or, when the inner radial side or inner circumference of the inner magnetic ring 40 is the S pole and the outer radial side or outer circumference of the inner magnetic ring 40 is the N pole, the inner radial side or inner circumference of the outer magnetic ring 30 is the S pole and the outer radial side or outer circumference of the outer magnetic ring 30 is the N pole, the inner magnetic ring 40 and the outer magnetic ring 30 attract each other under the action of their respective magnetic fields. Thus, when the vibration is transmitted to the shaft core 10 and pushes the shaft core 10 to move axially, the attraction between the inner magnetic ring 40 and the outer magnetic ring 30 reduces the vibration and plays a role in damping.

[0116] In one embodiment, see Figure 9 and Figure 10 The outer magnetic ring 30 includes two first annular magnets 33, which are arranged along the axial direction of the core 10. Understandably, the outer magnetic ring 30 may also include only one first annular magnet 33, for example, a first annular magnet 33 with a longer axial length can be used as the outer magnetic ring 30. Of course, the outer magnetic ring 30 may also include three, four, or other equal numbers of first annular magnets 33.

[0117] In one embodiment, see Figure 9 and Figure 11 The inner magnetic ring 40 includes two second annular magnets 43, which are arranged along the axial direction of the core 10. Understandably, the inner magnetic ring 40 may also include only one second annular magnet 43, for example, a second annular magnet 43 with a longer axial length can be used as the inner magnetic ring 40. Of course, the inner magnetic ring 40 may also include three, four, or other equal numbers of second annular magnets 43.

[0118] In one embodiment, see Figure 9 and Figure 12 The outer magnetic ring 30 also includes a first adapter 34, which is arranged along the axial direction of the first annular magnet 33 along the shaft core 10. The first adapter 34 and the first annular magnet 33 cooperate, so that when the required axial length of the outer magnetic ring 30 is fixed, when the length or number of the first annular magnet 33 is adjusted, the axial length of the outer magnetic ring 30 can remain unchanged by matching the corresponding first adapter 34, thus adapting to the overall axial length of the outer magnetic ring 30. This makes it easy to position and install the outer magnetic ring 30 in the housing 20 during assembly, facilitating the installation and fixation of the outer magnetic ring 30.

[0119] In one embodiment, there is one first adapter 34. Understandably, the first adapter 34 can also be two, three, or other quantities.

[0120] In one embodiment, the first adapter 34 is a ring-shaped part made of a non-magnetic material. That is, the first adapter 34 is made of a non-magnetic material, such as a non-magnetic metal material (such as aluminum alloy, copper, etc.), or it can be made of a non-magnetic and non-metallic material (such as plastic, ceramic, etc.) to ensure that the first adapter 34 has good rigidity and high load capacity, and will not affect the interaction of the magnetic fields generated by the inner magnetic ring 40 and the outer magnetic ring 30.

[0121] In one embodiment, see Figure 9 and Figure 13 The first adapters 34 are arranged in pairs. When the two first adapters 34 in a pair are placed at both ends of the first annular magnet 33, the first annular magnet 33 can be positioned at the middle position of the outer magnetic ring 30 axially. That is, each first annular magnet 33 is located between the two pairs of first adapters 34, and the whole formed by each first annular magnet 33 is located at the middle position of the outer magnetic ring 30 axially. When there is one first annular magnet 33, it is positioned at the middle of the axial direction of the outer magnetic ring 30. When there are two or three first annular magnets 33, the whole structure formed by these first annular magnets 33 is located at the middle of the axial direction of the outer magnetic ring 30. This makes it easier to position the first annular magnets 33 so that the magnetic whole structure formed by all the first annular magnets 33 of the outer magnetic ring 30 can be more easily aligned with the axial center of the inner magnetic ring 40. This makes the overall axial middle surface of the magnetic part in the outer magnetic ring 30 coincide with the axial middle surface of the inner magnetic ring 40, or makes the overall axial middle surface of the magnetic part in the outer magnetic ring 30 located near the axial middle surface of the inner magnetic ring 40. This ensures that the inner magnetic ring 40 and the core 10 are always in an ideal equilibrium position with dynamic stiffness close to zero along the axial direction.

[0122] In one embodiment, see Figure 9 and Figure 14 The inner magnetic ring 40 also includes a second adapter 44, which is arranged along the axial direction of the second annular magnet 43. The second adapter 44 and the second annular magnet 43 cooperate, so that when the required axial length of the inner magnetic ring 40 is fixed, and when the length or number of the second annular magnets 43 is adjusted, the axial length of the inner magnetic ring 40 can remain unchanged by matching the corresponding second adapter 44, thus adapting to the overall axial length of the inner magnetic ring 40. This makes it easy to position and install the inner magnetic ring 40 on the shaft core 10 during assembly, facilitating the installation and fixation of the inner magnetic ring 40.

[0123] In one embodiment, there is one second adapter 44. Understandably, the second adapter 44 can also be provided in two, three, or other quantities.

[0124] In one embodiment, the second adapter 44 is a ring-shaped part made of a non-magnetic material. That is, the second adapter 44 is made of a non-magnetic material, such as a non-magnetic metal material (e.g., aluminum alloy, copper, etc.), or it can be made of a non-magnetic and non-metallic material (e.g., plastic, ceramic, etc.) to ensure that the second adapter 44 has good rigidity and high load capacity, and will not affect the interaction of the magnetic fields generated by the inner magnetic ring 40 and the outer magnetic ring 30.

[0125] In one embodiment, see Figure 9 and Figure 15 The second adapter 44 is arranged in pairs. When the two second adapters 44 in a pair are placed at both ends of the second annular magnet 43, the second annular magnet 43 can be positioned at the middle position of the inner magnetic ring 40 axially. That is, each second annular magnet 43 is located between the two pairs of second adapters 44, and the whole formed by each second annular magnet 43 is located at the middle position of the inner magnetic ring 40 axially. When there is one second annular magnet 43, it is positioned at the middle of the axial direction of the inner magnetic ring 40. When there are two or three second annular magnets 43, the whole structure formed by these second annular magnets 43 is located at the middle of the axial direction of the inner magnetic ring 40. This makes it easier to position the second annular magnets 43 so that the magnetic whole structure formed by all the second annular magnets 43 of the inner magnetic ring 40 can be more easily aligned with the axial center of the outer magnetic ring 30. This makes the overall axial middle surface of the magnetic part in the inner magnetic ring 40 coincide with the axial middle surface of the outer magnetic ring 30, or makes the overall axial middle surface of the magnetic part in the inner magnetic ring 40 located near the axial middle surface of the outer magnetic ring 30. This ensures that the inner magnetic ring 40 and the core 10 are always in an ideal equilibrium position with dynamic stiffness close to zero along the axial direction.

[0126] The negative stiffness damping pad 100 of this application embodiment can achieve quasi-zero stiffness damping, and can ensure that the negative stiffness damping pad 100 has a good damping effect on both low frequency and high frequency vibrations, thus ensuring the good damping effect of the negative stiffness damping pad 100.

[0127] This application also provides a compressor, including a body, on which a negative stiffness vibration damping pad as described in any of the above embodiments is installed. In use, the shaft of the vibration damping pad can be connected to the body, and the outer shell of the vibration damping pad can be connected to the equipment using the compressor or a mounting base supporting the compressor. This compressor, using the negative stiffness vibration damping pads of the above embodiments, has the technical effects of the aforementioned negative stiffness vibration damping pads, not only providing good vibration isolation at low frequencies, but also achieving good vibration reduction and noise reduction even during high-frequency, severe compressor vibration.

[0128] The compressor in this application embodiment can be a rotary compressor, a reciprocating piston compressor, a scroll compressor, etc.

[0129] This application also provides a refrigeration and heating device, including the compressor described in any of the above embodiments. This refrigeration and heating device uses the compressor of the above embodiments and has the technical effects of the compressor described above, which will not be repeated here.

[0130] The refrigeration and heating equipment in the embodiments of this application can be a refrigeration-only device, such as a refrigerator, a heating-only device, or a device that combines refrigeration and heating.

[0131] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A negative stiffness vibration damping footmat, characterized by, The negative stiffness damping foot pad applied to the vibration isolation of the compressor comprises a shell, a shaft core, an inner magnetic ring, an outer magnetic ring and a sheet spring, the shell is provided with an inner cavity, one end of the inner cavity is open, one end of the shaft core extends into the inner cavity through the opening, the other end of the shaft core is provided with a rubber pad for connecting the object to be isolated, the inner magnetic ring is installed on the shaft core, the outer magnetic ring is installed in the inner cavity and surrounds the inner magnetic ring, the sheet spring supports the shaft core to make the inner magnetic ring and the outer magnetic ring coaxially arranged, the sheet spring is installed on the shell, 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 the same.

2. The negative stiffness vibration isolation footmat of claim 1, wherein: The rubber pad comprises a rubber sleeve for connecting the object to be isolated and a supporting pad for supporting the rubber sleeve, and the supporting pad is installed on the shaft core.

3. The negative stiffness vibration isolation footmat of claim 2, wherein: An annular groove for positioning and connecting the object to be isolated is formed on the outer circumferential surface of the rubber sleeve.

4. The negative stiffness vibration isolation footmat of claim 2, wherein: A positioning hole is formed on the supporting pad, and an end portion of the other end of the shaft core is provided with a positioning head which is inserted into the positioning hole.

5. The negative stiffness vibration isolation footmat of claim 2, wherein: A supporting table is provided on the shaft core, and the supporting pad is installed on the supporting table.

6. A negative stiffness vibration isolation footmat as claimed in any one of claims 1 to 5 wherein: The sheet spring is a cross-shaped spring.

7. A negative stiffness vibration isolation footmat as claimed in any one of claims 1 to 5 wherein: The outer magnetic ring comprises a plurality of first magnets arranged in an annular array, and the inner magnetic ring comprises a plurality of second magnets arranged in an annular 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.

8. A negative stiffness vibration isolation footmat as claimed in any one of claims 1 to 5 wherein: The sheet spring comprises a first spring and a second spring for cooperating to define the moving stroke of the shaft core, and the inner magnetic ring and the outer magnetic ring are both located between the first spring and the second spring.

9. The negative stiffness vibration isolation footmat of claim 8, wherein: First and second shaft sleeves for cooperating to position the inner magnetic ring are provided on the shaft core, the first shaft sleeve is arranged between the inner magnetic ring and the first spring, and the second shaft sleeve is arranged between the inner magnetic ring and the second spring.

10. The negative stiffness vibration isolation footmat of claim 9, wherein: A boss is provided on the shaft core, and the boss cooperates with the first shaft sleeve to clamp the first spring.

11. A negative stiffness vibration isolation footmat as claimed in any one of claims 1 to 5 wherein: The shell comprises a support, a ring cover installed on one end of the support, and an end cover installed on the other end of the support, the support is provided with an opening, the outer magnetic ring is arranged in the opening, a supporting ring is protruded from the inner surface of the opening, the supporting ring cooperates with the ring cover to clamp the outer magnetic ring, the end cover is provided with a recess for the shaft core to extend into, the sheet spring is installed between the end cover and the support, and the ring cover is provided with the sheet spring on the end away from the end cover.

12. The negative stiffness vibration isolation footmat of claim 11, wherein: A first deformation groove for the sheet spring to deform and move is formed on the end of the support away from the ring cover, and / or a second deformation groove for the sheet spring to deform and move is formed on the end of the ring cover away from the support.

13. The negative stiffness vibration isolation footmat of claim 12, wherein: A connecting shaft is protruded from the end of the end cover away from the support, and the connecting shaft is coaxially arranged with the shaft core.

14. A compressor comprising a housing, characterized by: The machine body is provided with the negative stiffness damping foot pad as claimed in any one of claims 1-13.

15. A refrigeration and heating apparatus, characterized by: The compressor comprises the negative stiffness damping foot pad as claimed in claim 14.

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