Magnetic viscous fluid damper and manufacturing method of coil assembly used therefor

摘要

A magnetic viscous fluid damper includes: a cylinder; a piston that is slidably interposed within the cylinder; two fluid chambers that are partitioned by the piston; a hollow rod that is coupled to the piston; an electromagnetic coil that is formed with a magnet wire wound around the piston; two lead wires that extend from both ends of the magnet wire; and a coil assembly in which the electromagnetic coil and the two lead wires are embedded in a mold resin. The piston includes a hollow first core coupled to the rod and a second core that sandwiches the coil assembly with the first core. The two lead wires are passed through the inside of the first core and are electrically continuous with an electric wire passed through the inside of the rod.