Vertical vibration isolation system

Patent metadata

Field	Value
Publication number	US-10670109-B2
Application number	US-201916266618-A
Country	US
Kind code	B2
Filing date	Feb 4, 2019
Priority date	Aug 28, 2018
Publication date	Jun 2, 2020
Grant date	Jun 2, 2020

Abstract

The vertical vibration isolation system of the present invention includes a bearing base, a guide rail assembly and a plurality of buckling elements. The bearing base has an upper platform that can move along a vertical direction. The guide rail assembly surrounds the bearing base and has a plurality of arc-shaped sliding channels. The top portion of each buckling element can move with the upper platform, while the bottom portion of each buckling element is slidably connected to the corresponding arc-shaped sliding channel. The vertical displacement of the upper platform would cause different degrees of buckling of the buckling elements and also induces sliding motion of the bottom portion of the buckling elements along the arc-shaped sliding channels. Accordingly, the vertical vibration isolation system can provide nonlinear restoring force by buckling and sliding mechanisms so as to exhibit vertical vibration isolation effect.

First claim

What is claimed is:

1. A vertical vibration isolation system, comprising:
a bearing base, having an upper platform, a motion guide mechanism and a lower fundament, wherein the upper platform is configured for disposing a vibration-isolated object thereon, and the motion guide mechanism is disposed between the upper platform and the lower fundament to permit displacement of the upper platform along a vertical direction with respect to the lower fundament;
a guide rail assembly, surrounding the bearing base and having a plurality of arc-shaped sliding channels, wherein each of the arc-shaped sliding channels extends from an inner position upwardly and laterally away from the bearing base to an outer position; and
a plurality of buckling elements, each having a top portion, a bottom portion and a body portion, wherein (i) the top portions of all the buckling elements are movable with the upper platform, (ii) the bottom portions of all the buckling elements are slidably disposed at the corresponding arc-shaped sliding channels, (iii) when the upper platform moves long the vertical direction with respect to the lower fundament, the top portions of all the buckling elements are brought into movement along the vertical direction with the upper platform to cause different degrees of buckling deformation in the body portions of the buckling elements, and (iv) when the buckling elements are forced into a predetermined degree of buckling deformation, the bottom portions of all the buckling elements slide to an equilibrium position along the arc-shaped sliding channels.

2. The vertical vibration isolation system of claim 1 , wherein each of the arc-shaped sliding channels has an arc shape of which slopes vary in an increasing trend from the inner position to the outer position.

3. The vertical vibration isolation system of claim 1 , wherein the bottom portions of all the buckling elements are configured as rollers.

4. The vertical vibration isolation system of claim 1 , wherein each of the body portions of the buckling elements is deformed to have a buckled shape with a concave surface facing in the bearing base when a downward force is applied on the top portions of the buckling elements.

5. The vertical vibration isolation system of claim 4 , wherein each of the body portions of the buckling elements is constructed by stacking a plurality of elastic sheets with different lengths.

6. The vertical vibration isolation system of claim 5 , wherein the elastic sheets are superposed in an order from the longest one to the shortest one along a lateral direction directed away from the bearing base.

7. The vertical vibration isolation system of claim 1 , wherein the guide rail assembly includes a plurality of rail stands, and each of the rail stands has the arc-shaped sliding channel.

8. The vertical vibration isolation system of claim 7 , wherein the rail stands are four rail stands, and the buckling elements are four buckling elements.

9. The vertical vibration isolation system of claim 8 , wherein the rail stands are symmetrically disposed at four sides of the bearing base, and the top portions of the buckling elements are symmetrically connected to four sides of the upper platform.

Assignees

• Nat Applied Res Laboratories

Inventors

• Chang Chia-Ming
• Yang Cho-Yen
• Huang Shieh-Kung
• Hsu Chen-Hao

Classifications

• F16F2230/0064

  using a cam · CPC title

• F16F2232/08

  Linear · CPC title

• F16F15/043 Primary

  acting on a cam follower · CPC title

• F16F15/073 Primary

  using only leaf springs · CPC title

• F16F2234/06

  plane or flat · CPC title