Reciprocating compressor using outer rotor motor

A reciprocating compressor, comprising:

• a bearing block;
• a fixed shaft extending vertically from a lower surface of the bearing block, formed in a cylindrical shape, and having a shaft hole formed therein;
• a stator disposed on the bearing block and including a coupling hole into which the fixed shaft is inserted;
• a holder disposed on an outer circumferential surface of the fixed shaft and configured to fix the stator to the bearing block;
• a rotating shaft inserted into the shaft hole of the fixed shaft;
• and
• a rotor disposed outside the stator and fixed to one end of the rotating shaft,
• wherein the outer circumferential surface of the fixed shaft and the shaft hole are formed concentrically,
• wherein the holder includes a fastener,
• wherein the fastener comprises:
• a ring portion having an inner diameter larger than a diameter of the fixed shaft, and
• a plurality of pressing portions protruding from an inner circumferential surface of the ring portion toward a center thereof,
• wherein the plurality of pressing portions are formed to be inclined with respect to the ring portion, and
• wherein an inner diameter of the plurality of pressing portions is smaller than the diameter of the fixed shaft.