Double variable sliding isolator

Patent metadata

Field	Value
Publication number	US-11193294-B2
Application number	US-202016841617-A
Country	US
Kind code	B2
Filing date	Apr 6, 2020
Priority date	Apr 6, 2020
Publication date	Dec 7, 2021
Grant date	Dec 7, 2021

Abstract

A double variable sliding isolator including a bottom sliding plate, a top sliding plate, and a friction piece is provided. The bottom sliding plate has a bottom sliding surface that has at least two curvatures. The top sliding plate is disposed over the bottom sliding plate and has a top sliding surface that has at least two curvatures. The friction piece is disposed between the top sliding plate and the bottom sliding plate and the friction piece is in contact with the bottom sliding surface and the top sliding surface. When an external force is applied to the bottom sliding plate and the top sliding plate, the bottom sliding plate and the top sliding plate will generate a relative displacement, so that the friction piece slides along the bottom sliding plate and the top sliding plate.

First claim

What is claimed is:

1. A double variable sliding isolator, comprising:
a bottom sliding plate, comprising a bottom sliding surface;
a top sliding plate, disposed over the bottom sliding plate and comprising a top sliding surface; and
a friction piece, slidably disposed between the top sliding plate and the bottom sliding plate and being in contact with the bottom sliding surface and the top sliding surface respectively,
wherein when an external force is applied to the bottom sliding plate and the top sliding plate, the bottom sliding plate and the top sliding plate are adapted to generate a relative displacement, so that the friction piece slides along the bottom sliding surface and the top sliding surface,
wherein the bottom sliding surface of the bottom sliding plate and the top sliding surface of the top sliding plate are symmetrically disposed,
wherein the top sliding surface and the bottom sliding surface consist of one or a plurality of continuous functions, wherein at least one of the continuous functions is a polynomial,
wherein at least one of the continuous functions is an eighth-degree polynomial y(x)=ax 8 +bx 6 +cx 4 +dx 2 .

2. The double variable sliding isolator according to claim 1 , wherein when the friction piece slides relative to the top sliding surface or the bottom sliding surface, a change of mechanical properties of the friction piece is as follows: a softening segment at first and then a hardening segment, a hardening segment at first and then a softening segment, a full hardening segment or a full soften segment.

3. The double variable sliding isolator according to claim 1 , wherein the friction piece comprises a stiffening portion and two flexible portions, the two flexible portions are respectively embedded on two opposite outer side surfaces of the stiffening portion, and the two flexible portions are in contact with the bottom sliding surface and the top sliding surface respectively.

4. The double variable sliding isolator according to claim 1 , wherein the friction piece comprises a stiffening portion and a plurality of flexible portions, the stiffening portion comprises a plurality of containing through holes penetrating through two opposite outer side surfaces of the stiffening portion, the flexible portions respectively penetrate through the plurality of containing through holes of the stiffening portion, two ends of each flexible portion respectively protrude out of the two outer side surfaces, and the two ends of each flexible portion are in contact with the bottom sliding surface and the top sliding surface respectively.

5. The double variable sliding isolator according to claim 4 , wherein the stiffening portion is made of steel, carbon fiber or a flexible material, and the flexible portions are made of ductile materials, such as ultra-high-molecular-weight polyethylene, polytetrafluoroethylene, rubber, or other similar flexible materials.

6. The double variable sliding isolator according to claim 1 , wherein the friction piece comprises a plurality of stiffening portions and a flexible portion, the flexible portion coats the stiffening portions and is level with the stiffening portions, and the stiffening portions are disposed at intervals.

7. The double variable sliding isolator according to claim 1 , wherein the friction piece comprises a first base, a second base and two flexible portions, the first base is connected to the second base, the first base and the second base are adapted to pivotally rotate relative to each other, the two flexible portions are respectively embedded on two opposite outer side surfaces of the first base and the second base, and the two flexible portions are in contact with the bottom sliding surface and the top sliding surface respectively.

8. The double variable sliding isolator according to claim 1 , wherein the friction piece comprises a first base, a second base and two flexible portions, the first base comprises a groove or a protruding spherical surface, the second base comprises a protruding spherical surface or a groove, and the protruding spherical surface is disposed in the groove, so that the first base and the second base are adapted to pivotally rotate relative to each other, the two flexible portions are respectively disposed on two opposite outer side surfaces of the first base and the second base.

9. The double variable sliding isolator according to claim 8 , wherein the first base and the second base are integrated with the two flexible portions respectively.

10. The double variable sliding isolator according to claim 7 , further comprising a plurality of stiffening portions embedded on the first base or the second base at intervals and configured to improve structural rigidity of the first base or the second base.

11. The double variable sliding isolator according to claim 1 , wherein the friction piece comprises a first base, a plurality of second bases and a plurality of flexible portions, the first base comprises a plurality of grooves formed in two opposite outer side surfaces of the first base respectively, each second base comprises a spherical surface, the spherical surfaces of the second bases are respectively disposed in the corresponding grooves, so that each second base and the first base are adapted to pivotally rotate relative to each other, the flexible portions are respectively embedded on the second bases and are away from the grooves, and the flexible portions are in contact with the bottom sliding surface and the top sliding surface respectively.

12. The double variable sliding isolator according to claim 1 , wherein a lubricant is disposed between the friction piece and the bottom sliding surface as well as the top sliding surface and configured to reduce friction coefficients between the friction piece and the bottom sliding surface as well as the top sliding surface.

13. The double variable sliding isolator according to claim 1 , wherein the friction piece comprises a plurality of concave holes formed in two loading surfaces in contact with the bottom sliding surface and the top sliding surface respectively and configured to improve heat dissipation efficiency when each loading surface is in contact with the bottom sliding surface and the top sliding surface.

14. The double variable sliding isolator according to claim 13 , wherein a lubricant is disposed in the concave holes of the friction piece to preserve the lubricant, and the lubricant is configured to reduce friction coefficients between each loading surface and the bottom sliding surface as well as the top sliding surface.

15. The double variable sliding isolator according to claim 1 , wherein the friction piece is integrally formed, and the friction piece is made of ductile materials, such as ultra-high-molecular-weight polyethylene, polytetrafluoroethylene, rubber, or other similar flexible materials.

16. The double variable sliding isolator according to claim 1 , wherein the friction piece is a column.

Assignees

• Univ Nat Cheng Kung
• Well Link Ind Co Ltd

Inventors

• Lu Lyan-Ywan
• Huang Han-Wei
• Lee Chun-Lung

Classifications

• E04H9/021 Primary

  Bearing, supporting or connecting constructions specially adapted for such buildings · CPC title

• E04H9/023

  and comprising rolling elements, e.g. balls, pins · CPC title

• E04H9/022 Primary

  and comprising laminated structures of alternating elastomeric and rigid layers · CPC title