Patent ID: 6948418

Claim:
A hermetic reciprocating compressor, comprising: a rotating shaft provided with an eccentric part at an upper portion thereof; a drive unit to rotate the rotating shaft; a frame having a shaft bore to receive the rotating shaft therein, with a first annular bearing seat formed around an upper edge of the shaft bore; a cylinder block provided at an upper portion of the frame to define a compression chamber therein; a piston received in the compression chamber to perform a rectilinear reciprocation in the compression chamber so as to compress a refrigerant, in response to a rotation of the eccentric part of the rotating shaft; a first radial bearing seated in the first annular bearing seat of the frame to sustain both axial loads of the rotating shaft and horizontal loads acting in the rotating shaft due to the rectilinear reciprocation of the piston, the first radial bearing comprising a first outer race supported by the frame and a first inner race set around the rotating shaft; a second annular bearing seat formed around a lower edge of the shaft bore; a second radial bearing seated in the second annular bearing seat, the second radial bearing comprising a second outer race supported by the frame and a second inner race set around the rotating shaft; a stop ring provided around the rotating shaft to support a lower surface of the second inner race of the second radial bearing; and a second spacing depression formed on an upper surface of the second annular bearing seat, such that an upper surface of the second inner race of the second radial bearing is spaced apart from the upper surface of the second annular bearing seat.