Electromagnetic actuator and fluid-filled active vibration damping device using the same

摘要

An electromagnetic actuator wherein an annular supporting member secured to a stator and an oscillator member secured to a movable member are disposed in opposition in an axis-perpendicular direction and are elastically linked by a supporting rubber elastic body disposed therebetween. One axial face of the supporting rubber elastic body is furnished with an inside peripheral recessed portion and an outside peripheral protruding portion while another axial face is furnished with an inside peripheral protruding portion and an outside peripheral recessed portion so as to establish in the supporting rubber elastic body an elastic center axis that curves along a sinuous trajectory of an interconnected peak segment and valley segment situated between opposing faces of the annular supporting member and the oscillator member in the axis-perpendicular direction.

主权项

1. An electromagnetic actuator comprising:
a stator having a stator magnetic path provided by yoke members attached about a circumference of a coil; a movable member disposed in a center hole of the coil, the movable member being actuated in an axial direction of the coil through action of a magnetic field generated by energizing the coil; an annular supporting member secured to the stator; an oscillator member secured to the movable member while being disposed in opposition to the annular supporting member across a gap in an axis-perpendicular direction; and a supporting rubber elastic body of annular plate shape disposed between opposing faces of the annular supporting member and the oscillator member in the axis-perpendicular direction, and elastically linking the oscillator member to the annular supporting member, wherein the supporting rubber elastic body includes a thin walled portion, and at the thin walled portion, one axial face of the supporting rubber elastic body is furnished with an inside peripheral recessed portion and a first outside peripheral protruding portion while another axial face of the supporting rubber elastic body is furnished with a first inside peripheral protruding portion and an outside peripheral recessed portion.