Patent ID: 6619221
Filing Date: 2003-09-16
Classification: B63B,F16F,Y10T

Abstract:
An oscillation suppression device comprising:a base body having a monocoque structure and an attachment portion secured to a ship body; a gimbals supported by the base body such that the gimbals can rotate around a first axis; a flywheel provided in the gimbals such that the flywheel can rotate around a second axis perpendicular to the first axis; a motor which rotates the flywheel, said motor including a rotor member having at least a portion thereof received in a recess formed in an end face of the flywheel, and a stator member secured to the gimbals and opposed to the rotor member with a predetermined gap therebetween; said rotor member and the stator member are located inside a locus-of-rotation along which the gimbals rotates around the first axis; a dashpot type damper which suppresses rotation of the gimbals relative to the base body, and includes a short cylindrical housing exposed to an outside of the base body and containing a hydraulic fluid, a partition member rotatably received in the housing, and an orifice formed between a first liquid chamber and a second liquid chamber, the partition member partitioning an interior of the housing into the first and second liquid chambers, the partition member rotating within the housing in accordance with rotation of the base body relative to the gimbals; bearings built into a pair of side walls of the monocoque type base body, respectively, the gimbals being rotatably supported by the base body via the bearings; and a cover portion provided at the base body and covering an outer surface of the gimbals.