Tuned mass damper

Abstract

A tuned mass damper, suitable for mounting to a metal base below a semiconductor device, includes a mass, two adjustment mechanisms, two conductive plates, a vibrating plate, and two magnetic elements. The mass has a first outer side and a second outer side opposite to each other. The two adjustment mechanisms are located on the first outer side and the second outer side, respectively. The two conductive plates are respectively connected to the two adjustment mechanisms and are located above the mass. The vibrating plate has a first end and a second end opposite to each other, the first end extending into the mass. The two magnetic elements correspond to the two conductive plates above each other and are adapted to be magnetically attracted to a first structure of the metal base, with an air gap between each magnetic element and its corresponding conductive plate.

Claims

1. A tuned mass damper, adapted for mounting to a metal base beneath a semiconductor device, the tuned mass damper comprising: A mass block having a first outer side and a second outer side opposite to each other; The two adjustment mechanisms are located on the first outer side and the second outer side, respectively; Two conductive plates are respectively connected to the two adjustment mechanisms and located above the mass block; a vibrating plate has a first end and a second end opposite to each other, the first end extending into the mass block; and two magnetic elements are corresponding to the two conductive plates and adapted to be magnetically attracted to the metal base in a first structure, with an air gap between each magnetic element and the corresponding conductive plate.

2. The tuned mass damper as claimed in claim 1, wherein the two conductive plates are made of antimagnetic material, and when each conductive plate and the corresponding magnetic element move relative to each other under vibration, eddy currents are generated, thereby generating magnetic damping.

3. The tuned mass damper as claimed in claim 1, wherein the mass includes a first portion and a second portion, the first portion having a first outer side and a first inner side relative to the first outer side, the second portion having a second outer side and a second inner side relative to the second outer side, the first inner side being connected to the second inner side.

4. The tuned mass damper as claimed in claim 3, wherein the first portion has a first groove located on the first inner side, the second portion has a second groove located on the second inner side, the first groove corresponding to the second groove to form a slot, the first groove and the second groove extending to a front surface and a rear surface of the mass to penetrate the mass, the first end of the vibrating plate being inserted into the slot from the front surface, the front surface and the rear surface being located between the first outer surface and the second outer surface.

5. The tuned mass damper as claimed in claim 4, wherein the mass has a through hole, the vibrating plate has a groove, and a first fixing member passes through the through hole, the groove, and the slot from the first outer side.

6. The tuned mass damper as claimed in claim 5 further includes a plurality of second fasteners, the mass having a plurality of through holes, the second fasteners being inserted into the through holes from the first outer side to secure the first portion to the second portion.

7. The tuned mass damper as claimed in claim 3, wherein the first portion and the second portion are symmetrically arranged on opposite sides of the vibrating plate.

8. The tuned mass damper as claimed in claim 1, wherein the two conductive plates are symmetrically arranged on opposite sides of the vibrating plate, and the two magnetic elements are symmetrically arranged on opposite sides of the vibrating plate.

9. The tuned mass damper as claimed in claim 1, wherein the mass includes two lugs connected to the first outer side and the second outer side of the mass, respectively, and each lug includes a threaded hole.

10. The tuned mass damper as claimed in claim 9, wherein each of the adjustment mechanisms comprises: A first nut, each first nut being fixed to a lower surface of each conductive sheet opposite to each magnetic element; a second nut, each second nut being located on a lower side of each lifting lug opposite to each conductive sheet; and a bolt, each bolt passing through each second nut, each lifting lug, and each first nut to connect to each conductive sheet, the normal direction of the surface of each conductive sheet being parallel to an axial direction of the bolt, the axial direction corresponding to the center position of each magnetic element.

11. The tuned mass damper as claimed in claim 10, wherein each of the first nuts is attached to each of the conductive sheets.

12. The tuned mass damper as claimed in claim 10, wherein each of the first nuts is not welded to each of the conductive plates.

13. The tuned mass damper as claimed in claim 1, wherein each of the conductive plates and each of the magnetic elements are circular plates, and each of the conductive plates is parallel to each of the magnetic elements.

14. The tuned mass damper as claimed in claim 13, wherein each of the conductive plates and the corresponding magnetic element are coaxially configured.

15. The tuned mass damper as claimed in claim 13, wherein a first distance between the two conductive plates is less than a second distance between the two magnetic elements.

16. The tuned mass damper as claimed in claim 13, wherein the area of ​​each conductive sheet is 2.5 to 3 times the area of ​​each magnetic element.

17. The tuned mass damper as claimed in claim 1, wherein the normal direction of the surface of the vibrating plate is perpendicular to the normal direction of the surface of the conductive plate.

18. The tuned mass damper as claimed in claim 1 further includes a connecting portion having a slot on one side, the second end extending into the slot, and the other side of the connecting portion being adapted to be fixed to a second structure of the metal base.

19. The tuned mass damper as claimed in claim 18, wherein the connection includes two plates arranged opposite each other, each plate including a first segment and a second segment connected together, each first segment being opposite to each other, and the ends of each second segment extending in opposite directions.

20. The tuned mass damper as claimed in claim 19, wherein each of the first segments has a recess, and each recess corresponds to form the slot.

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