Microminiature vibration isolator

Abstract

The utility model relates to the technical field of vibration and noise control, in particular to a microminiature vibration isolator. The device comprises a bottom plate, a lower shell, a top plate, an upper shell and an elastic element, the lower shell is fixed on the bottom plate, the upper shell is fixed on the top plate, the upper shell partially wraps the lower shell, the elastic element is arranged between the upper shell and the lower shell, the device further comprises a flexible ring, an outer flange extending outwards is arranged at an opening in the top end of the lower shell, and the elastic element is arranged between the upper shell and the lower shell. An inner flange extending inwards is arranged at the opening of the bottom end of the upper shell, the outer diameter of the flexible ring is larger than the inner diameter of the inner flange at the opening of the upper shell, the inner diameter of the flexible ring is matched with the outer diameter of the lower shell, and the flexible ring is arranged on the lower shell in a sleeving mode and wrapped by the upper shell. When a product is assembled, the flexible ring can be pressed into the overlapped area of the upper shell and the lower shell through extrusion deformation of the flexible ring, so that the upper shell and the lower shell are assembled into a whole.

Description

Technical Field

[0001] This utility model relates to the field of vibration and noise control technology, specifically to a miniature vibration isolator. Background Technology

[0002] Vibration isolators are vibration-damping elements that connect equipment and foundations, used to reduce and eliminate vibrational forces transmitted from the equipment to the foundation or vibrations transmitted from the foundation to the equipment. Existing vibration isolators typically consist of a top plate, a bottom plate, and an elastic element. The elastic element is supported between the top and bottom plates. The top plate connects to the equipment, and the bottom plate connects to the foundation. Sometimes, for protection of internal components and to accommodate damping fluid, a housing is also provided on the top and bottom plates. To assemble the components into a single unit, a connecting structure is usually provided between the top and bottom plates. Common connecting structures include screws, tie rods, and hooks. These connecting structures are located on the surface or inside the vibration isolator and serve to connect and fix it during transportation and installation. After the vibration isolator is installed, the connecting structures need to be released to avoid affecting the normal compression deformation of the isolator. These connecting structures not only occupy space on the vibration isolator itself but also require operating space around the isolator during release. For larger vibration isolators, the application of these connecting structures is more convenient. However, for miniature vibration isolators with a small overall size, such as those used in vehicles, ships, and other mechanical equipment, these isolators are not only small in size but also require limited installation space and surrounding operating space. Therefore, implementing commonly used connection structures on miniature vibration isolators presents numerous inconveniences.

[0003] Therefore, a new connection structure is needed to assemble and fix this miniature vibration isolator. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a miniature vibration isolator that can be easily connected and fixed to the top plate and the bottom plate, thereby realizing the integrated assembly of the vibration isolator without release operation and without affecting the compression deformation of the vibration isolator; at the same time, the miniature vibration isolator also has the characteristics of simple structure, low cost and convenient application.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A miniature vibration isolator includes a base plate, a lower housing, a top plate, an upper housing, and an elastic element. The lower housing is fixed to the base plate, and the upper housing is fixed to the top plate. The upper housing partially encloses the lower housing. The elastic element is disposed between the upper and lower housings. The device also includes a flexible ring. The lower housing has an outwardly extending flange at its top opening, and the upper housing has an inwardly extending flange at its bottom opening. The outer diameter of the flexible ring is larger than the inner diameter of the inner flange at the opening of the upper housing. The inner diameter of the flexible ring matches the outer diameter of the lower housing. The flexible ring is fitted onto the lower housing and is enclosed by the upper housing.

[0007] Furthermore, the elastic element is a rubber block, a polyurethane pad, or a helical spring.

[0008] Furthermore, the miniature vibration isolator also includes a damping element, which is a damping fluid disposed in the lower housing.

[0009] Furthermore, a groove is provided below the outer flange of the outer wall of the lower housing, and a flexible ring is fitted inside the groove.

[0010] Furthermore, the miniature vibration isolator also includes an assembly fixture, which includes a base, an arc-shaped upright plate, and ear plates. The outer diameter of the arc-shaped upright plate is smaller than the inner flange at the opening of the upper shell, and the inner diameter of the arc-shaped upright plate is equal to the outer diameter of the lower shell. The ear plates are provided with connecting interfaces. The base is fixed on the outer wall of the arc-shaped upright plate, and the ear plates are fixed on both sides of the arc-shaped upright plate. After the two assembly fixtures are assembled, they can be clamped onto the outer wall of the lower shell.

[0011] Furthermore, the ear plate connection interface is connected by hinge, thread, or snap-fit.

[0012] By setting assembly fixtures or creating grooves on the outer wall of the lower housing, the efficiency and effectiveness of pressing the flexible ring into the area between the upper and lower housings during product assembly can be improved. The basic principle of this technical solution is to provide a support platform for the flexible ring, which provides reaction force support during pressing. Furthermore, the outer diameter of this support platform is smaller than the inner diameter of the inner flange at the opening of the upper housing, so that the upper part of the lower housing, the flexible ring, and this support platform can be sequentially wrapped inside after the upper housing is pressed down.

[0013] When assembling the miniature vibration isolator of this utility model, the elastic element is first placed in the lower housing, and the flexible ring is placed on the outer wall below the outer flange of the lower housing. Then, the upper housing is aligned with the center line of the lower housing, and the upper housing is moved so that its bottom opening fits onto the lower housing. The flexible ring is pushed down to the support platform provided by the assembly fixture or the groove of the lower housing. Pressure is continued to be applied so that the flexible ring is squeezed and deformed, and the upper housing can continue to move downward to wrap the flexible ring and the support platform inside. Finally, the downward pressure on the upper housing is removed. At this time, the elastic element rebounds and lifts the upper housing together with the flexible ring. Finally, the flexible ring is lifted to the outer flange of the lower housing or below the outer flange. This completes the assembly of the miniature vibration isolator. During disassembly, opposite pulling forces need to be applied to the top and bottom plates. First, the flange of the upper housing opening, the flexible ring, and the flange of the lower housing opening are brought into contact and squeezed. When the pulling force reaches a certain level, the flexible ring is squeezed and deformed, and the outer flange of the lower housing and the flexible ring are both dislodged from the inner flange at the opening of the upper housing. At this point, the micro-vibration isolator can be disassembled.

[0014] Depending on product requirements, the elastic element can be in a pre-compressed or free state after assembly. If the flexible ring is lifted to the outer flange of the lower housing, but the elastic element has not returned to its free height, this state is equivalent to pre-compressing and pre-loading the elastic element. The advantage of pre-compression is that it allows the elastic element to be in the expected working state and improves the ease of installation of the vibration isolator. During pre-compression, it is sufficient to ensure that the pre-compression load is less than the pull-out force when the upper and lower housings separate. The magnitude of this pull-out force can be set by adjusting the gap between the outer flanges of the upper and lower housings and the stiffness of the flexible ring, based on the product size, pre-compression load, weight of the lower housing and the elastic element. If the flexible ring has not yet risen to the outer flange of the lower housing, but the elastic element has returned to its free height, the upper and lower housings have relative room for movement, but will not separate.

[0015] Flexible rings can be made from a variety of materials such as rubber, polyurethane, and polytetrafluoroethylene.

[0016] This invention, by providing flanges at the openings of the lower and upper housings and combining them with a flexible ring, achieves the following beneficial effects:

[0017] (1) During product assembly, the flexible ring can be pressed into the overlapping area of ​​the upper and lower shells through the extrusion deformation of the flexible ring, so as to realize the assembly of the upper and lower shells into one piece;

[0018] (2) When handling this product during storage, transportation and installation, the upper and lower housings of the micro vibration isolator will not separate on their own due to the blocking effect of the flexible ring and the two flanges;

[0019] (3) After installation, the micro vibration isolator is subjected to pressure, and the upper shell can vibrate smoothly within a certain range. The flexible ring and flange structure will not cause obstruction or influence. Therefore, no release operation is required after the product is installed.

[0020] (4) During disassembly, only the upper and lower shells need to be pulled in opposite directions. When the pulling force reaches a certain limit, the flexible ring is squeezed and deformed, and the upper and lower shells can be separated, thereby realizing the disassembly of the micro vibration isolator.

[0021] (5) It can achieve pre-compression of elastic elements;

[0022] (6) It also has the characteristics of simple structure, compact shape, convenient application and low cost. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the miniature vibration isolator of this utility model in Embodiment 1.

[0024] Figure 2 This is a schematic diagram of the assembly tooling structure of the micro-miniature vibration isolator of this utility model in Embodiment 1.

[0025] Figure 3 This is a schematic diagram of the structure of the miniature vibration isolator of this utility model in Embodiment 2. Detailed Implementation

[0026] Example 1

[0027] like Figure 1 and Figure 2 As shown, the miniature vibration isolator in this embodiment includes a base plate 1, a lower housing 2, a top plate 3, an upper housing 4, and an elastic element 5. It also includes a flexible ring 6. The lower housing 2 has an outwardly extending outer flange 21 at its top opening, and the upper housing 4 has an inwardly extending inner flange 41 at its bottom opening. The lower housing 2 is fixed to the base plate 1, and the upper housing 4 is fixed to the top plate 3. The upper housing 4 partially encloses the lower housing 2. The elastic element 5 is disposed between the upper housing 4 and the lower housing 2. The outer diameter of the flexible ring 5 is larger than the inner diameter of the inner flange 41 at the opening of the upper housing, and the inner diameter of the flexible ring 5 is smaller than the inner diameter of the inner flange 41 at the opening of the upper housing. The outer diameter of the shell 2 is matched, the flexible ring 5 is sleeved on the lower shell 2 and wrapped by the upper shell 4, and also includes an assembly fixture, which includes a base 7, an arc-shaped upright plate 8 and an ear plate 9. The outer diameter of the arc-shaped upright plate 8 is smaller than the inner diameter of the inner flange 41 at the opening of the upper shell, and the inner diameter of the arc-shaped upright plate 8 is equal to the outer diameter of the lower shell 2. The ear plate 9 is provided with a connection interface. The base 7 is fixed on the outer wall of the arc-shaped upright plate 8, and the ear plate 9 is fixed on both sides of the arc-shaped upright plate 8. After the two assembly fixtures are assembled, they can be clamped on the outer wall of the lower shell. The connection interface of the ear plate is connected by hinge, thread, snap-fit, etc.

[0028] The elastic element 5 is a rubber block, a polyurethane pad, or a coil spring; in this embodiment, a rubber block is selected. The connecting interface of the ear plate 9 is connected by means of hinge, thread, snap-fit, etc. In this embodiment, the connecting interface is a through hole, which can be used for threaded connection. The flexible ring 6 can be made of various materials such as rubber, polyurethane, and polytetrafluoroethylene.

[0029] By setting up assembly fixtures, the efficiency and effectiveness of pressing the flexible ring into the area between the upper and lower shells during product assembly can be improved. The assembly fixtures are only used during assembly and must be removed after assembly. The function of the assembly fixtures is to provide a support platform for the flexible ring, which provides reaction force support during pressing. The outer diameter of this support platform is smaller than the inner diameter of the inner flange at the opening of the upper shell, so that after the upper shell is pressed down, the upper part of the lower shell, the flexible ring, and this support platform can be sequentially wrapped inside.

[0030] During the production and assembly of the miniature vibration isolator in this embodiment, after the two assemblers have assembled it correctly, it is clamped onto the outer wall of the lower housing, as follows: Figure 1As shown by the dashed line. First, place the elastic element into the lower housing, with the flexible ring fitted onto the outer wall below the outer flange of the lower housing; then align the centerline of the upper housing with that of the lower housing, move the upper housing so that its bottom opening fits onto the lower housing, and push the flexible ring down onto the top surface of the curved vertical plate of the assembly fixture (as shown by the dashed line). Figure 1 (As shown by the dashed line) Continue applying pressure to deform the flexible ring, allowing the upper housing to continue moving downwards and enclosing the flexible ring and support platform. Finally, release the downward pressure on the upper housing. At this point, the elastic element rebounds, lifting the upper housing along with the flexible ring. Ultimately, the flexible ring is lifted to the outer flange of the lower housing or below the outer flange. This completes the assembly of the miniature vibration isolator. During disassembly, apply opposite pulling forces to the top and bottom plates. First, bring the flange of the upper housing opening, the flexible ring, and the flange of the lower housing opening into contact and compress them. When the pulling force reaches a certain level, the flexible ring is deformed, and both the outer flange of the lower housing and the flexible ring disengage from the inner flange of the upper housing opening. This allows for the disassembly of the miniature vibration isolator.

[0031] Depending on product requirements, the elastic element can be in a pre-compressed or free state after assembly. If the flexible ring is lifted to the outer flange of the lower housing, but the elastic element has not returned to its free height, this state is equivalent to pre-compressing and pre-loading the elastic element. The advantage of pre-compression is that it allows the elastic element to be in the expected working state and improves the ease of installation of the vibration isolator. During pre-compression, it is sufficient to ensure that the pre-compression load is less than the pull-out force when the upper and lower housings separate. The magnitude of this pull-out force can be set by adjusting the gap between the outer flanges of the upper and lower housings and the stiffness of the flexible ring, based on the product size, pre-compression load, weight of the lower housing and the elastic element. If the flexible ring has not yet risen to the outer flange of the lower housing, but the elastic element has returned to its free height, the upper and lower housings have relative room for movement, but will not separate.

[0032] The miniature vibration isolator in this embodiment achieves the following advantages by using flanges at the openings of the lower and upper housings, combined with a flexible ring: First, during product assembly, the flexible ring can be pressed into the overlapping area of ​​the upper and lower housings through compression deformation, achieving integrated assembly of the upper and lower housings; second, during storage, transportation, and installation, the upper and lower housings of the miniature vibration isolator will not detach on their own due to the blocking effect of the flexible ring and the two flanges; third, after installation, the miniature vibration isolator can withstand pressure, and the upper housing can vibrate smoothly within a certain range without obstruction or influence from the flexible ring and flange structure, thus eliminating the need for release operations after installation; fourth, during disassembly, only reverse pulling of the upper and lower housings is required. When the pulling force reaches a certain limit, the flexible ring is compressed and deformed, allowing the upper and lower housings to separate, thereby enabling disassembly of the miniature vibration isolator; sixth, it also features a simple structure, compact shape, convenient application, and low cost.

[0033] Example 2

[0034] like Figure 3 As shown, the difference between this embodiment and embodiment one is that a groove 22 is provided below the outer flange 21 of the outer wall of the lower housing 2, the flexible ring 6 is sleeved in the groove 22, and a damping element 10 is also included. The damping element 10 is a damping fluid disposed in the lower housing 2.

[0035] Elastic element 5 is a helical spring.

[0036] This embodiment uses the same application and installation method as the miniature vibration isolator in Embodiment 1, and will not be described in detail here. It should be noted that in this embodiment, the flexible ring is installed by providing a groove on the outer wall of the lower housing. During assembly, the lower sidewall of the groove provides a support platform for the flexible ring, which provides reaction force support when pressed in. Furthermore, the outer diameter of this support platform is smaller than the inner diameter of the inner flange at the opening of the upper housing, so that the upper part of the lower housing, the flexible ring, and this support platform can be sequentially enclosed after the upper housing is pressed down. When the upper and lower housings are about to separate, the upper sidewall of the groove acts as a barrier to the flexible ring. The vertical width of the groove also restricts the range of free movement of the upper and lower housings.

[0037] The miniature vibration isolator in this embodiment restricts the flexible ring by setting grooves on the outer wall of the lower housing, thereby achieving a fixed connection between the upper and lower housings. It offers advantages such as convenient assembly and reliable connection, while also featuring a simple structure and low cost. Furthermore, by adding damping elements, the vibration reduction performance of this miniature vibration isolator can be further enhanced.

[0038] Based on the basic principle of this embodiment, the mating structure of the upper and lower shells can be modified. For example, the groove on the outer wall of the lower shell can be placed on the upper shell, or the damping fluid can be replaced with an independent damper component to achieve the same effect and purpose. Such modifications will not be described in detail here, but they all fall within the protection scope of this utility model.

Claims

1. A miniature vibration isolator, comprising a base plate, a lower housing, a top plate, an upper housing, and an elastic element, wherein the lower housing is fixed to the base plate, the upper housing is fixed to the top plate, the upper housing partially encloses the lower housing, and the elastic element is disposed between the upper and lower housings, characterized in that, It also includes a flexible ring. The lower shell has an outwardly extending flange at the top opening and an inwardly extending flange at the bottom opening of the upper shell. The outer diameter of the flexible ring is larger than the inner diameter of the inner flange at the opening of the upper shell. The inner diameter of the flexible ring matches the outer diameter of the lower shell. The flexible ring is fitted onto the lower shell and is wrapped by the upper shell.

2. The miniature vibration isolator as described in claim 1, characterized in that, The elastic element is a rubber block, a polyurethane pad, or a helical spring.

3. The miniature vibration isolator as described in claim 1, characterized in that, It also includes a damping element, which is a damping fluid located in the lower housing.

4. The miniature vibration isolator as described in claim 1, characterized in that, The outer flange of the lower shell has a groove below it, and the flexible ring is fitted inside the groove.

5. The miniature vibration isolator as described in claim 1, 2, or 3, characterized in that, It also includes assembly fixtures, which include a base, an arc-shaped upright plate, and ear plates. The outer diameter of the arc-shaped upright plate is smaller than the inner flange at the opening of the upper shell. The inner diameter of the arc-shaped upright plate is equal to the outer diameter of the lower shell. The ear plates are provided with connecting interfaces. The base is fixed on the outer wall of the arc-shaped upright plate, and the ear plates are fixed on both sides of the arc-shaped upright plate. After the two assembly fixtures are assembled, they can be clamped onto the outer wall of the lower shell.

6. The miniature vibration isolator as described in claim 5, characterized in that, The ear plate is connected via hinge, thread, or snap-fit.

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