Patent ID: 10119617

Abstract:
A sealing device that can mitigate stress concentration in a bellows part when a shaft deviates as it rotates. The sealing device 100 includes a fixed part 110 fixed to an inner circumference of a shaft hole in a housing 200, a thin bellows part 120 extending from the fixed part 110 toward a surface of the shaft 300 in a bellows shape, and a sealing part 130 provided on a radially inner side of the bellows part 120. The bellows part 120 includes, on one side thereof, circumferentially alternating ridges 121 extending radially from outside to inside and grooves 122 extending radially from outside to inside, and on the other side, grooves 123 and ridges 124 that are exact backsides of the ridges 121 and grooves 122 on the one side, respectively. The bellows part 120 is formed to have a substantially equal thickness t over an entire circumference thereof.