METAL BELLOWS-TYPE ACCUMULATOR

The purpose of the present invention is to provide a metal bellows-type accumulator in which reduced durability due to a metal bellows (2) vibrating in the radial direction and contacting the inner circumferential surface (11 a) of an outer shell (1) does not occur. To achieve said purpose, the bellows-type accumulator is provided with: an outer shell (1), on one end of which a pressure-introducing passage (C) is opened; a metal bellows (2) which is capable of expanding and contracting in the axial direction, comprises ridges (211) facing radially outward and troughs (212) facing inward formed alternately in the axial direction, and has one end (21 a) in the axial direction fixed to the outer shell (1), wherein the metal bellows (2) separates the inner chamber of the outer shell (1) into a pressure introduction chamber (A) that is in communication with the pressure-introducing passage (C) and a gas chamber (B) in which a cushioning gas is sealed; and a support member (3), which is disposed on the inner circumference of the metal bellows (2) and is obtained from a cushioning material that is fixed to the outer shell (1). The gap in the radial direction between the troughs (212) of the metal bellows (2) and the outer circumferential surface of the support member (3) is smaller than the gap in the radial direction between the ridges (211) of the metal bellows (2) and the inner circumferential surface (11 a) of the outer shell (1).