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Title:
EDDY CURRENT DAMPER
Document Type and Number:
WIPO Patent Application WO/2019/044722
Kind Code:
A1
Abstract:
An eddy current damper (1) includes a screw shaft (7), a plurality of first permanent magnets (3), a plurality of second permanent magnets (4), a cylindrical magnet holding member (2), a conductive member (5) having conductivity and a cylindrical shape, and a ball nut (6) engaged with the screw shaft (7). The screw shaft (7) is movable in the axial direction. The first permanent magnets (3) are arrayed along the circumferential direction around the screw shaft (7). The second permanent magnets (4) are disposed between the first permanent magnets (3), leaving gaps with the first permanent magnets (3), and dispositions of magnetic poles are inverted between the first permanent magnets (3) and the second permanent magnets (4). The magnet holding member (2) holds the first permanent magnets (3) and the second permanent magnets (4). The conductive member (5) opposes the first permanent magnets (3) and the second permanent magnets (4), leaving gaps with the first permanent magnets (3) and the second permanent magnets (4). The ball nut (6) is disposed in the magnet holding member (2) and the conductive member (5), and is fixed to the magnet holding member (2) or the conductive member (5).

Inventors:
IMANISHI KENJI (JP)
YAMAGUCHI HIROYUKI (JP)
MASUI RYOHSUKE (JP)
NAKAMINAMI SHIGEKI (JP)
KIDA HIDENORI (JP)
Application Number:
PCT/JP2018/031458
Publication Date:
March 07, 2019
Filing Date:
August 24, 2018
Export Citation:
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Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
ASEISMIC DEVICES CO LTD (JP)
International Classes:
F16F15/03
Foreign References:
JP2017511867A2017-04-27
JP2010159837A2010-07-22
JP2010038241A2010-02-18
JP2011196507A2011-10-06
JP2013244841A2013-12-09
US20150167769A12015-06-18
JPH0586496A1993-04-06
JPH09177880A1997-07-11
JP2000320607A2000-11-24
Other References:
See also references of EP 3677812A4
Attorney, Agent or Firm:
ASCEND IP LAW FIRM (JP)
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