EDDY CURRENT-TYPE DAMPER - NIPPON STEEL & SUMITOMO METAL CORP

Title:

EDDY CURRENT-TYPE DAMPER

Document Type and Number:

Japanese Patent JP2019078331

Kind Code:

A

Abstract:

To provide an eddy current-type damper that is capable of suppressing degradation of vibration attenuation performance and degradation of durability resulting from a temperature rise of a ball nut.SOLUTION: An eddy current-type damper 1 comprises: 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 cylindrical conductive member 5 having conductivity; a ball nut 6 engaged with the screw shaft 7; and a heat insulation member 12. The first permanent magnets 3 are arranged along the circumferential direction around the screw shaft 7. Each of the second permanent magnets 4 is arranged between first permanent magnets 3, and has an opposite configuration of magnetic poles to the first permanent magnet 3. The magnet holding member 2 holds the first permanent magnets 3 and the second permanent magnets 4. The conductive member 5 faces the first permanent magnets 3 and the second permanent magnets 4 across gaps. The ball nut 6 is fixed to the magnet holding member 2. The heat insulation member 12 is provided in a mounting part for the ball nut 6 and the magnet holding member 2.SELECTED DRAWING: Figure 2

Inventors:

NOGUCHI YASUTAKA
NOGAMI YUTAKA
MASUI RYOSUKE
IMANISHI KENJI

Application Number:

JP2017205621A

Publication Date:

May 23, 2019

Filing Date:

October 24, 2017

Export Citation:

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