A vibration damper and an adjustable elastic center vibration isolation device

Abstract

This invention discloses a vibration damper and a vibration isolation device with an adjustable elastic center. The vibration damper includes a housing, within which an elastic body is disposed. The elastic body includes a fixed elastic body and an adjustable elastic body, with the adjustable elastic body located within an adjustment groove of the fixed elastic body. An adjustment assembly is provided between the housing and the adjustable elastic body. An upper connecting plate is provided on the upper part of the elastic body, and a connecting assembly is provided on the upper connecting plate. One of the upper connecting plate and the housing has a device mounting structure, and the other has a base mounting structure. The vibration isolation device includes a device and a base, comprising at least one of the aforementioned vibration dampers. One of the upper connecting plate and the housing is connected to the device, and the other is connected to the base. Adjusting the elastic center of the vibration isolation device is achieved by adjusting the radial position of the adjustable elastic body within the vibration damper, which is achieved through the adjustment assembly. After adjustment, the adjustment assembly is removed. The advantages of this invention are: simple structure, strong interchangeability, and ease of installation, disassembly, and maintenance.

Description

Technical Field

[0001] This invention belongs to the field of vibration isolation technology for optoelectronic equipment and other precision equipment, specifically relating to a vibration damper and a vibration isolation device with an adjustable elastic center. Background Technology

[0002] Vibration isolation is an essential component in modern precision equipment. It protects sensitive components from external excitations, ensuring the structural integrity of the equipment. It also reduces the impact of external excitations on precision servo control, ensuring tracking performance. In the initial design phase, a three-dimensional model is often used to determine the center of mass for selecting vibration dampers. To optimize vibration isolation performance, the elastic center of the vibration isolation device composed of a series of dampers must coincide with the center of mass of the equipment.

[0003] However, during equipment development, uncertainties in the center of gravity of purchased components or other issues not considered in the initial design (such as cable routing) can cause deviations between the actual center of gravity of the equipment and the initial design, resulting in the previously selected vibration dampers and their installation positions not being optimal. The traditional approach is to add counterweights to the equipment to align its center of gravity with the elastic center of the vibration isolation device, thereby achieving optimal performance. However, this method increases the overall mass of the equipment and also presents the problem of not being able to add counterweights to certain locations (such as windows) under the optimal counterweight scheme, leading to counterweight failure. Summary of the Invention

[0004] The purpose of this invention is to provide a vibration damper and an adjustable elastic center vibration isolation device. This solution is reasonably designed, has a simple structure, strong interchangeability, and is suitable for mass production, thus solving the problem of the non-adjustable elastic center of existing vibration dampers.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] A vibration damper includes a housing, within which an elastic body is disposed. The elastic body includes a fixed elastic body and an adjustable elastic body. The adjustable elastic body is radially movably disposed within an adjustment groove of the fixed elastic body. An adjustment assembly is disposed between the housing and the adjustable elastic body. An upper connecting plate is disposed on the upper part of the elastic body. The upper connecting plate is provided with a connecting assembly that enables a detachable connection between the fixed elastic body and the adjustable elastic body. One of the upper connecting plate and the housing is provided with an equipment mounting structure, and the other is provided with a base mounting structure.

[0007] Furthermore, both the fixed elastomer and the adjustable elastomer are made of rubber.

[0008] Furthermore, the fixed elastomer has a cylindrical structure, the adjustable elastomer has a vertical strip structure, and the fixed elastomer is located in the cylindrical groove of the outer shell.

[0009] Furthermore, the adjustment groove has a side opening, and the inner wall of the adjustment groove is engaged with the adjustable elastic body through a multi-stage locking tooth fit.

[0010] Furthermore, the aforementioned adjustment grooves are provided in four parts and arranged in a cross shape.

[0011] Furthermore, the outer circumferential surface of the fixed elastomer is bonded and fixed to the inner circumferential surface of the cylindrical groove of the outer shell.

[0012] Furthermore, the adjustment assembly includes an adjustment rod, which is radially movable and threaded onto the outer casing. The inner end of the adjustment rod is provided with an adjustment ring, and the adjustable elastic body is provided with a pre-embedded magnet that magnetically engages with the adjustment ring.

[0013] Furthermore, the connecting assembly includes a lower connecting plate, an upper connecting plate passing through a fixed elastic body and connected to the lower connecting plate, and the fixed elastic body being sandwiched between the upper connecting plate and the lower connecting plate.

[0014] Furthermore, the lower shaft section of the upper connecting plate is threadedly connected to the center seat of the lower connecting plate, and both the lower shaft section of the upper connecting plate and the center seat of the lower connecting plate are located within the shaft hole of the fixed elastic body.

[0015] Furthermore, the upper connecting plate is provided with a device connection structure, which is a screw hole, and the lower connecting plate is provided with a base connection structure, which is a through hole.

[0016] An elastic center adjustable vibration isolation device includes a device and a base, including at least one of the above-described vibration dampers, one of the upper connecting plate and the housing is connected to the device, and the other is connected to the base. The elastic center of the vibration isolation device is adjusted by adjusting the radial position of the adjustable elastic body in the vibration damper. The radial position of the adjustable elastic body in the vibration damper is adjusted by adjusting the adjusting component. After adjustment, the adjusting component is removed.

[0017] Furthermore, it includes four vibration dampers, which are circumferentially distributed in the front, rear, left and right directions.

[0018] The beneficial effects of this invention are as follows: By designing the vibration damper with an adjustable elastic center, each vibration damper can adjust its own elastic center before use by adjusting the radial position of the adjustable rubber within the fixed rubber. By combining the vibration dampers with adjusted elastic centers, the elastic center of the entire vibration isolation device can be made closest to the equipment's center of mass, thereby optimizing the performance of the vibration isolation device. This invention has a simple structure, strong interchangeability, and is easy to install, disassemble, and maintain.

[0019] The aforementioned main solution of the present invention and its various further alternative solutions can be freely combined to form multiple solutions, all of which are solutions that can be adopted and are claimed by the present invention; furthermore, the (non-conflicting alternatives) can also be freely combined with each other and with other alternatives. Those skilled in the art, after understanding the solution of the present invention, will realize that there are many combinations based on existing technology and common knowledge, all of which are technical solutions to be protected by the present invention, and will not be exhaustively listed here. Attached Figure Description

[0020] Figure 1 This is a cross-sectional view of the vibration damper of the present invention.

[0021] Figure 2 This is a schematic diagram of the positioning of the fixed and adjustable elastomer teeth of the present invention.

[0022] Figure 3 This is an isometric view of the vibration damper of the present invention.

[0023] Figure 4 This is an isometric view of the vibration isolation device of the present invention.

[0024] Figure 5 This is a schematic diagram of the elastic center adjustment of the vibration isolation device of the present invention.

[0025] Figure 6 This is a comparison diagram of the vibration modes of the damper after the two centers coincide.

[0026] Figure 7 This is a comparison diagram of the resonance of the vibration isolation device after the two centers coincide.

[0027] In the diagram: 1-Fixed elastomer, 2-Upper connecting plate, 3-Adjusting iron ring, 4-Adjusting rod, 5-Embedded magnet, 6-Adjustable elastomer, 7-Lower connecting plate, 8-Outer shell, 9-Equipment, 10-Base. Detailed Implementation

[0028] The following non-limiting examples are used to illustrate the present invention.

[0029] Example 1:

[0030] refer to Figures 1-3 , Figure 6 As shown, a shock absorber with an elastic center that can be adjusted according to actual usage requirements includes an elastic body (including a fixed elastic body 1 and an adjustable elastic body 6), an upper connecting plate 2, an adjusting iron ring 3, an adjusting rod 4, a pre-embedded magnet 5, and a housing 8.

[0031] The outer casing 8 includes a central cylinder and an outer bottom edge that are connected as one piece. The central cylinder has a cylindrical groove for housing the elastic body, and an inner edge for restraining and supporting the elastic body.

[0032] The elastomer includes a fixed elastomer 1 and an adjustable elastomer 6, both made of rubber. The materials of the fixed elastomer 1 and the adjustable elastomer 6 may be different. Preferably, the hardness of the fixed elastomer is lower than that of the adjustable elastomer, and the adjustable range of the elastic center is larger.

[0033] The fixed elastic body 1 is a cylindrical structure, and it is located in the cylindrical groove of the outer shell 8. The outer circumferential surface of the fixed elastic body 1 is glued to the inner circumferential surface of the cylindrical groove of the outer shell 8. The adjustable elastic body 6 is a vertical strip structure, and it is radially movable in the adjustment groove of the fixed elastic body 1.

[0034] The adjustment groove has a side opening, and there are four adjustment grooves arranged in a cross shape. The inner wall of the adjustment groove and the adjustable elastic body 6 are engaged by a multi-stage locking tooth, thereby determining the axial position of the adjustable elastic body in the fixed elastic body, and also realizing multi-stage position adjustment of the adjustable elastic body. In this embodiment, each adjustable elastic body has three adjustable positions in its radial position, and with the installation position remaining unchanged, the elastic center of a single shock absorber has 49 possible positions.

[0035] An adjustment assembly is provided between the outer casing 8 and the adjustable elastic body 6, which is used to adjust the radial position of the adjustable elastic body 6 on the fixed elastic body 1. The adjustment assembly includes an adjustment ring 3, an adjustment rod 4, and a pre-embedded magnet 5.

[0036] A radially movable adjusting rod 4 is threaded onto the outer casing 8. Twisting the adjusting rod 4 changes its radial extension. An adjusting ring 3 is heat-fitted to the inner end of the adjusting rod 4. An embedded magnet 5, magnetically engaging with the adjusting ring 3, is pre-embedded within the adjustable elastic body 6. This magnetic connection allows the adjusting rod 4 to temporarily move the adjustable elastic body 6.

[0037] The upper part of the elastic body is provided with an upper connecting plate 2, and the upper connecting plate 2 is provided with a connecting assembly that enables the fixed elastic body 1 and the adjustable elastic body 6 to be detachably connected. The connecting assembly includes a lower connecting plate 7, the upper connecting plate 2 passes through the fixed elastic body 1 and is connected to the lower connecting plate 7, the fixed elastic body 1 is sandwiched between the upper connecting plate 2 and the lower connecting plate 7, and this connection can apply pressure to the fixed elastic body, thereby pressing the adjustable elastic body and the fixed elastic body together.

[0038] The upper connecting plate 2 has a T-shaped structure, and the lower connecting plate 7 has a center seat at its center. The upper plate portion of the upper connecting plate 2 is located above the fixed elastic body 1, and the lower shaft section of the upper connecting plate 2 is threadedly connected to the center seat of the lower connecting plate 7. The lower connecting plate 7 is located below the fixed elastic body 1. Both the lower shaft section of the upper connecting plate 2 and the center seat of the lower connecting plate 7 are located within the shaft hole of the fixed elastic body 1, and the lower shaft section of the upper connecting plate 2 is glued and fixed within the shaft hole.

[0039] Before using the shock absorber, first rotate the adjusting rod to adjust the radial position of the adjustable elastic body in the fixed elastic body, then tighten the upper connecting plate and the lower connecting plate to determine the elastic center of the shock absorber, and finally unscrew the adjusting rod out of the shock absorber housing.

[0040] The upper connecting plate 2 has a device connection structure, which consists of screw holes. The lower connecting plate 7 has a base connection structure, which consists of through holes. In use, the upper connecting plate is threaded to the device, and the shock absorber housing is threaded to the base through four through holes, thus connecting the device to the base via a set of shock absorbers. The rubber shock absorber's appearance and interface are similar to conventional rubber shock absorbers, offering high interchangeability and easy assembly.

[0041] The radial position of a set (four) of adjustable elastomers within the vibration damper is adjusted by adjusting rods, adjusting iron rings, and pre-embedded magnets, thus fine-tuning the elastic center of the damper. This type of rubber vibration damper, used to construct a vibration isolation device, allows for improved vibration isolation performance without traditional counterweight methods by adjusting the elastic center to be closest to the equipment's center of mass. It also improves vibration isolation performance when an optimal counterweight position is unavailable, resulting in lighter weight, improved appearance, and excellent vibration isolation performance.

[0042] Figure 6 This paper compares the vibration damper's relevant mode shapes under two conditions: when the elastic center of the vibration isolation device deviates from the equipment's center of mass and when it does not. It can be seen that when the elastic center coincides with the center of mass, the number of vibration damper's relevant mode shapes decreases from 6 to 1, indicating an improvement in vibration isolation performance.

[0043] Example 2:

[0044] refer to Figures 1-7 As shown, an elastically adjustable vibration isolation device includes a device 9 and a base 10, including at least one vibration damper of embodiment 1. The upper connecting plate 2 is connected to the device 9 through screw holes and screws, and the outer shell 8 is connected to the base 10 through through holes and screws.

[0045] The vibration damper comprises four components, which are circumferentially distributed in the front, rear, left, and right directions. The elastic center of the vibration isolation device is adjusted by adjusting the radial position of the adjustable elastic body 6 within the vibration damper. This adjustment is achieved through an adjusting assembly, which is then removed after adjustment.

[0046] Adjusting the radial position of a set (four) of adjustable rubbers in the vibration damper by adjusting the rod, adjusting the iron ring, and pre-embedded magnets, fine-tunes the elastic center of the vibration damper. Therefore, the elastic center of the vibration isolation device, which consists of a series of vibration dampers with adjustable elastic centers, can also be adjusted. Thus, the elastic center of the vibration isolation device can be adjusted to be near the center of mass of the equipment, which can improve the vibration isolation effect of the vibration isolation device.

[0047] The vibration isolation device, which consists of a series of these dampers, has many elastic centers. Therefore, by adjusting the elastic center of the vibration isolation device to be as close as possible to the center of mass of the equipment, the vibration isolation performance can be improved to the greatest extent, thereby making the entire equipment lighter, more aesthetically pleasing, and with excellent vibration isolation performance.

[0048] In actual assembly and adjustment, the center of elasticity is not easy to coincide with the center of mass; it can only be brought close to it. Figure 7 When the elastic center of the vibration isolation device is close to the center of mass of the equipment, the frequency range of the resonance zone of the vibration isolation device will be reduced, and the vibration isolation effect will be more ideal.

[0049] The foregoing basic examples and their further alternative examples of the present invention can be freely combined to form multiple embodiments, all of which are embodiments that can be adopted and are claimed by the present invention. In the present invention, each alternative example can be arbitrarily combined with any other basic example and alternative example.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A shock absorber, comprising a housing (8), wherein an elastic body is disposed within the housing (8), characterized in that: The elastic body includes a fixed elastic body (1) and an adjustable elastic body (6). The adjustable elastic body (6) is radially movably disposed in the adjustment groove of the fixed elastic body (1). An adjustment component is provided between the outer shell (8) and the adjustable elastic body (6). An upper connecting plate (2) is provided on the upper part of the elastic body. A connecting component is provided on the upper connecting plate (2) to realize the detachable connection between the fixed elastic body (1) and the adjustable elastic body (6). One of the upper connecting plate (2) and the outer shell (8) is provided with an equipment mounting structure, and the other is provided with a base mounting structure. Adjusting the radial position of the adjustable elastomer relative to the fixed elastomer adjusts the elastic center of the damper itself.

2. The vibration damper according to claim 1, characterized in that: Both the fixed elastomer (1) and the adjustable elastomer (6) are made of rubber.

3. The vibration damper according to claim 1 or 2, characterized in that: The fixed elastomer (1) is a cylindrical structure, the adjustable elastomer (6) is a vertical strip structure, and the fixed elastomer (1) is located in the cylindrical groove of the outer shell (8).

4. The vibration damper according to claim 1, characterized in that: The adjustment groove has a side opening, and the inner wall of the adjustment groove is engaged with the adjustable elastic body (6) through a multi-level toothed interlocking mechanism.

5. The vibration damper according to claim 1 or 4, characterized in that: The aforementioned adjustment grooves are provided in four parts and arranged in a cross shape.

6. The vibration damper according to claim 1, characterized in that: The adjustment assembly includes an adjustment rod (4), which is radially movable and threaded onto the outer shell (8). The inner end of the adjustment rod (4) is provided with an adjustment iron ring (3), and the adjustable elastic body (6) is provided with a pre-embedded magnet (5) that magnetically engages with the adjustment iron ring (3).

7. The vibration damper according to claim 1 or 6, characterized in that: The connecting assembly includes a lower connecting plate (7), an upper connecting plate (2) passing through a fixed elastic body (1) and connected to the lower connecting plate (7), and the fixed elastic body (1) is sandwiched between the upper connecting plate (2) and the lower connecting plate (7).

8. The vibration damper according to claim 1, characterized in that: The upper connecting plate (2) is provided with a device connection structure, which is a screw hole, and the lower connecting plate (7) is provided with a base connection structure, which is a through hole.

9. A vibration isolation device with an adjustable elastic center, comprising a device (9) and a base (10), characterized in that: Includes at least one of the vibration dampers according to any one of claims 1 to 8, one of the upper connecting plate (2) and the housing (8) is connected to the device (9), and the other is connected to the base (10). The elastic center of the vibration isolation device is adjusted by adjusting the radial position of the adjustable elastic body (6) in the vibration damper. The radial position of the adjustable elastic body (6) in the vibration damper is adjusted by adjusting the assembly. After the adjustment is completed, the adjusting assembly is removed.

10. The vibration isolation device with adjustable elastic center according to claim 9, characterized in that: It includes four vibration dampers, which are circumferentially distributed in the front, rear, left and right directions.

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