Geometrically nonlinear vibration isolation system

Patent metadata

Field	Value
Publication number	US-10655704-B2
Application number	US-201916259318-A
Country	US
Kind code	B2
Filing date	Jan 28, 2019
Priority date	Aug 23, 2018
Publication date	May 19, 2020
Grant date	May 19, 2020

Abstract

The geometrically nonlinear isolation system of the present invention includes a bearing platform, an isolator and a damper. The isolator is connected with the bearing platform and used for providing resilience against horizontal relative displacement between the bearing platform and the isolator. The damper is pin-jointed to the bearing platform and has an axis orthogonal or oblique to the horizontal direction. Accordingly, when the bearing platform and the isolator move with respect to each other along the horizontal direction, the angle between the axis of the damper and the horizontal direction would change with the horizontal displacement, and the damper provides damping force along a direction parallel to the axis of the damper so as to enhance horizontal vibration isolation effect.

First claim

What is claimed is:

1. A geometrically nonlinear vibration isolation system, comprising:
a bearing platform for a vibration-isolated object disposed thereon;
an isolator connected to the bearing platform and configured to cooperate with the bearing platform for providing resilience against relative displacement in a horizontal direction between the bearing platform and the isolator; and
a damper pin-connected to the bearing platform, wherein (i) an axis of the damper is orthogonal to or oblique to the horizontal direction when no external force is applied thereto, (ii) the relative displacement in the horizontal direction between the bearing platform and the isolator induces a change in an angle between the axis of the damper and the horizontal direction, and (iii) the damper provides a damping force along a direction parallel to the axis against the relative displacement.

2. The geometrically nonlinear vibration isolation system of claim 1 , wherein the isolator is disposed under the bearing platform, and the damper has two opposite ends pin-connected to the bearing platform and the isolator, respectively.

3. The geometrically nonlinear vibration isolation system of claim 2 , wherein the isolator is connected to the bearing platform by at least one sliding element, which slidably abuts and contacts a concave curved surface of at least one sliding rail.

4. The geometrically nonlinear vibration isolation system of claim 3 , wherein the at least one sliding element is located at a deepest position of the curved concave surface.

5. The geometrically nonlinear vibration isolation system of claim 3 , wherein (i) the isolator includes a supporting stand and the at least one sliding element, (ii) the at least one sliding rail is formed at a bottom side of the bearing platform, and (iii) the at least one sliding element is disposed between the supporting stand and the at least one sliding rail.

6. The geometrically nonlinear vibration isolation system of claim 5 , wherein the supporting stand of the isolator has a bottom base and at least one bolster element erected on the bottom base, and the at least one sliding element is disposed at a top end of the at least one bolster element.

7. The geometrically nonlinear vibration isolation system of claim 6 , wherein the damper is disposed vertically or obliquely between the bearing platform and the bottom base.

8. The geometrically nonlinear vibration isolation system of claim 1 , wherein the axis of the damper is orthogonal to the horizontal direction when no external force is applied thereto, and an increase of the relative displacement between the bearing platform and the isolator results in larger stretching deformation of the damper and reduced slope of the axis.

Assignees

• Nat Applied Res Laboratories

Inventors

• Chang Chia-Ming
• Huang Shieh-Kung
• Yang Cho-Yen

Classifications

• F16F2230/0023

  protective · CPC title

• F16F15/023 Primary

  using fluid means · CPC title

• F16F2238/04

  Damper · CPC title

• F16F9/3235

  of cylinders (F16F9/483 takes precedence) · CPC title

• F16F9/512

  Means responsive to load action, {i.e. static load} on the damper or {dynamic} fluid pressure {changes} in the damper, {e.g. due to changes in velocity (F16F9/504, F16F9/516 take precedence; non-automatic damper adjustment from a distance using servo control, the servo pressure being created by the flow of damping fluid F16F9/465; self-pumping fluid springs in vehicle suspensions B60G17/044)} · CPC title