Magnetic arrangement quasi-zero stiffness vibration isolation device
By combining the magnetic arrangement of springs and permanent magnets in the vibration isolation device, the superposition of positive and negative stiffness is achieved, which solves the problem of poor effect of traditional vibration isolation technology in low-frequency vibration isolation, and achieves low-frequency vibration isolation effects with high static support and high load capacity.
Patent Information
- Application Number
- CN202421254463.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-03
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-06-03
AI Technical Summary
Traditional vibration isolation technology has limited effect in low-frequency vibration isolation, and it is difficult to meet the needs of high static stiffness and high load capacity.
A magnetically arranged quasi-zero stiffness vibration isolation device is designed to provide high positive stiffness through springs, and permanent magnet interaction provides high negative stiffness, achieving the superposition of positive stiffness and negative stiffness, achieving the effect of quasi-zero stiffness, and at the same time having high load capacity.
It realizes low-frequency vibration isolation in high static support occasions, has high load capacity, can effectively control low-frequency vibration, and improves the stability and service life of the equipment.
Smart Images
Figure CN222633724U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vibration isolation devices, in particular to a magnetic arrangement quasi-zero stiffness vibration isolation device. Background Art
[0002] Vibration, especially low-frequency vibration, often has an adverse effect on the stability and service life of mechanical equipment. In the field of precision instrument and optical equipment manufacturing, vibration may weaken the processing accuracy and performance of the product. Therefore, effectively controlling and isolating vibration is crucial to improving equipment performance.
[0003] Traditional vibration isolation technology (such as spring-damper system) often performs better in isolating high-frequency vibrations, but has limited effect in isolating low-frequency vibrations. In order to overcome the limitations of traditional vibration isolation technology, quasi-zero stiffness vibration isolation devices came into being.
[0004] In many current engineering applications, quasi-zero stiffness vibration isolators have a higher demand for high static stiffness in order to support the ever-increasing effective load. The utility model proposes a magnetically arranged quasi-zero stiffness vibration isolation device with high load capacity. Utility Model Content
[0005] In order to overcome the defects in the above-mentioned prior art, the utility model provides a magnetic arrangement quasi-zero stiffness vibration isolation device, which can achieve low-frequency vibration isolation in high static support occasions, wherein the spring provides high positive stiffness, and the three permanent magnets interact to provide high negative stiffness. While the positive stiffness and negative stiffness are superimposed to achieve quasi-zero stiffness, it can also have a high load capacity.
[0006] Technical Solution
[0007] A magnetic arrangement quasi-zero stiffness vibration isolation device comprises a base, a third shell is arranged on the base, a first magnetic group structure is arranged at the upper end of the third shell, the upper end of the first magnetic group structure is fixedly connected to another third shell, a second magnetic group structure is arranged at the upper end of the third shell, a central axis passes through the middle of the first magnetic group structure and the second magnetic group structure and is slidably connected up and down, and a load supporting platform is fixedly provided at the upper end of the central axis.
[0008] Furthermore, the second magnetic group structure includes a first shell and a second shell arranged on the upper side of the third shell, and the first shell and the second shell are provided with a third permanent magnet mounted on the central axis, and the outer side of the third permanent magnet is sequentially mounted with a second permanent magnet and a first permanent magnet located inside the first shell and the second shell from the inside to the outside.
[0009] Furthermore, the first magnetic group structure includes a sixth shell and a seventh shell arranged between the two third shells, and the interior of the sixth shell and the seventh shell is provided with a fifth permanent magnet mounted on the central axis, and the outer side of the fifth permanent magnet is sequentially mounted with the seventh permanent magnet and the sixth permanent magnet located inside the sixth shell and the seventh shell from the inside to the outside.
[0010] Furthermore, a fourth permanent magnet fixed on the central axis is arranged between the first magnetic group structure and the second magnetic group structure, and a fifth shell is arranged on the outer side of the fourth permanent magnet.
[0011] Furthermore, a first flange bearing fixed to the central axis is disposed on the upper side of the first shell, a fixing piece is disposed on the lower side of the load supporting platform, and a first spring penetrating through the central axis is fixedly connected between the fixing piece and the first flange bearing.
[0012] Furthermore, a second flange bearing fixed to the central axis is provided on the lower side of the seventh shell, a third flange bearing fixed to the central axis is provided on the base, and a second spring penetrating the central axis is fixedly connected between the third flange bearing and the second flange bearing.
[0013] Beneficial effects of the utility model:
[0014] It can realize low-frequency vibration isolation in high static support occasions, wherein the spring provides high positive stiffness, and the interaction between the permanent magnets provides high negative stiffness. While the positive stiffness and negative stiffness are superimposed to achieve quasi-zero stiffness, it can also have a high load capacity, and can realize low-frequency vibration isolation in high static support occasions. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a cross-sectional schematic diagram of a magnetic arrangement quasi-zero stiffness vibration isolation device of the utility model;
[0016] Figure 2 It is a schematic diagram of the magnetic arrangement of the utility model;
[0017] Figure 3 It is a schematic diagram of the external structure of the utility model.
[0018] Reference numerals
[0019] First magnetic group structure 901, second magnetic group structure 902, load supporting platform 1, fixing part 2, central axis 3, first flange bearing 4, first shell 5, second shell 6, first permanent magnet 7, second permanent magnet 8, third permanent magnet 9, fourth permanent magnet 10, third shell 11, fifth shell 12, fifth permanent magnet 13, sixth permanent magnet 14, seventh permanent magnet 15, second flange bearing 16, second spring 17, base 18, third flange bearing 19, first spring 20, sixth shell 21, seventh shell 22. DETAILED DESCRIPTION
[0020] In order to better illustrate the content of the utility model, the following is a description with reference to the accompanying drawings and implementation examples:
[0021] like Figure 1-3 As shown, the utility model discloses a magnetic arrangement quasi-zero stiffness vibration isolation device, including a base 18, a third shell 11 is arranged on the base 18, a first magnetic group structure 901 is arranged on the upper end of the third shell 11, the upper end of the first magnetic group structure 901 is fixedly connected to another third shell 11, a second magnetic group structure 902 is arranged on the upper end of the third shell 11, a central axis 3 is passed through the middle of the first magnetic group structure 901 and the second magnetic group structure 902 and is slidably connected up and down, and a load supporting platform 1 is fixedly provided on the upper end of the central axis 3.
[0022] Furthermore, the second magnetic group structure 902 includes a first shell 5 and a second shell 6 arranged on the upper side of the third shell 11, and the first shell 5 and the second shell 6 are provided with a third permanent magnet 9 mounted on the central axis 3, and the outer side of the third permanent magnet 9 is sequentially mounted with the second permanent magnet 8 and the first permanent magnet 7 located inside the first shell 5 and the second shell 6 from the inside to the outside.
[0023] Furthermore, the first magnetic group structure 901 includes a sixth shell 21 and a seventh shell 22 arranged between the two third shells 11, and the interior of the sixth shell 21 and the seventh shell 22 is provided with a fifth permanent magnet 13 mounted on the central axis 3, and the outer side of the fifth permanent magnet 13 is sequentially mounted with a seventh permanent magnet 15 and a sixth permanent magnet 14 located inside the sixth shell 21 and the seventh shell 22 from the inside to the outside.
[0024] Furthermore, a fourth permanent magnet 10 fixed on the central axis 3 is disposed between the first magnetic group structure 901 and the second magnetic group structure 902 , and a fifth housing 12 is disposed on the outer side of the fourth permanent magnet 10 .
[0025] Furthermore, a first flange bearing 4 fixed to the central axis 3 is provided on the upper side of the first housing 5, a fixing member 2 is provided on the lower side of the load supporting platform 1, and a first spring 20 penetrating the central axis 3 is fixedly connected between the fixing member 2 and the first flange bearing 4.
[0026] Furthermore, a second flange bearing 16 fixed to the central axis 3 is provided on the lower side of the seventh housing 22, a third flange bearing 19 fixed to the central axis 3 is provided on the base 18, and a second spring 17 penetrating the central axis 3 is fixedly connected between the third flange bearing 19 and the second flange bearing 16.
[0027] Specifically, the first permanent magnet 7, the second permanent magnet 8, the third permanent magnet 9, the fifth permanent magnet 13, the sixth permanent magnet 14, the seventh permanent magnet 15 and the fourth permanent magnet 10 provide high negative stiffness through strong magnetic coupling, which is superimposed with the positive stiffness generated by the first spring 20 and the second spring 17 to achieve quasi-zero stiffness.
[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the technical solution of the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solution recorded in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solution from the spirit and scope of the technical solution of each embodiment of the utility model.
Claims
1. A magnetic arrangement quasi-zero stiffness vibration isolation device, characterized in that: The invention comprises a base (18), a third shell (11) is arranged on the base (18), a first magnetic group structure (901) is arranged at the upper end of the third shell (11), the upper end of the first magnetic group structure (901) is fixedly connected to another third shell (11), a second magnetic group structure (902) is arranged at the upper end of the third shell (11), a central axis (3) passes through the first magnetic group structure (901) and the second magnetic group structure (902) and is slidably connected up and down, and a load supporting platform (1) is fixedly arranged at the upper end of the central axis (3).
2. A magnetic arrangement quasi-zero stiffness vibration isolation device according to claim 1, characterized in that: The second magnetic group structure (902) comprises a first shell (5) and a second shell (6) which are arranged on the third shell (11) on the upper side; a third permanent magnet (9) which is mounted on the central axis (3) is arranged inside the first shell (5) and the second shell (6); and the outer side of the third permanent magnet (9) is sequentially mounted with a second permanent magnet (8) and a first permanent magnet (7) which are located inside the first shell (5) and the second shell (6) from the inside to the outside.
3. A magnetic arrangement quasi-zero stiffness vibration isolation device according to claim 2, characterized in that The first magnetic group structure (901) comprises a sixth shell (21) and a seventh shell (22) arranged between the two third shells (11); a fifth permanent magnet (13) mounted on the central axis (3) is arranged inside the sixth shell (21) and the seventh shell (22); and a seventh permanent magnet (15) and a sixth permanent magnet (14) located inside the sixth shell (21) and the seventh shell (22) are mounted on the outer side of the fifth permanent magnet (13) in sequence from the inside to the outside.
4. A magnetic arrangement quasi-zero stiffness vibration isolation device according to claim 3, characterized in that: A fourth permanent magnet (10) fixed on the central axis (3) is arranged between the first magnetic group structure (901) and the second magnetic group structure (902), and a fifth housing (12) is arranged on the outer side of the fourth permanent magnet (10).
5. A magnetic arrangement quasi-zero stiffness vibration isolation device according to claim 4, characterized in that: A first flange bearing (4) fixed to the central axis (3) is arranged on the upper side of the first housing (5), a fixing member (2) is arranged on the lower side of the load supporting platform (1), and a first spring (20) penetrating the central axis (3) is fixedly connected between the fixing member (2) and the first flange bearing (4).
6. A magnetic arrangement quasi-zero stiffness vibration isolation device according to claim 5, characterized in that: A second flange bearing (16) fixedly mounted on the central axis (3) is disposed on the lower side of the seventh housing (22); a third flange bearing (19) fixedly mounted on the central axis (3) is disposed on the base (18); a second spring (17) penetrating the central axis (3) is fixedly connected between the third flange bearing (19) and the second flange bearing (16).