Patent ID: 8684670

Claim:
A sealing mechanism for hermetically sealing a shaft body and absorbing relative displacement, the sealing mechanism comprising: a pair of space forming rings which face each other and are configured for surrounding the shaft body, wherein the pair of space forming rings are respectively arranged on end surfaces of support members facing each other; an outer bellows-joint having one end connected to an outer periphery of one of the space forming rings and another end connected to an outer periphery of the other of the space forming rings; and an inner bellows-joint having one end connected to an inner periphery of one of the space forming rings and another end connected to an inner periphery of the other of the space forming rings, wherein the inner bellows joint is nested in the outer bellows-joint, and the inner bellows-joint and the outer bellows-joint are arranged concentrically with respect to the shaft body, wherein each of the inner bellows joint and the outer bellows joint is a corrugated plate, and wherein the space forming rings space the inner bellows joint and the outer bellows-joint apart from each other such that the inner bellows joint and the outer bellows joint do not come in contact with each other.