Patent ID: 7591638
Filing Date: 2009-09-22
Classification: F04B,H02K

Abstract:
1. A structure for fixing a motor stator of a reciprocating compressor, the reciprocating compressor comprising: a frame unit elastically supported in a casing, the frame unit comprising a plurality of frames assembled to each other; a reciprocating motor including a cylindrical outer stator having upper and lower side surfaces fixedly coupled to the frame unit, a cylindrical inner stator inserted into the outer stator, and a mover inserted between the outer stator and the inner stator and performing a reciprocation; and a compression unit disposed at an outer periphery of the reciprocating motor, and mechanically connected to the mover of the reciprocating motor, wherein the compression unit compresses a refrigerant in response to a linear-reciprocation driving force received from the reciprocating motor, wherein an upper side surface of the inner stator is coupled to one frame coupled to an upper side surface of the outer stator, and wherein an inner circumferential surface and a lower side surface of the inner stator are freely disposed with respect to the one frame coupled to the upper side surface of the inner stator, wherein a welding groove having a ring shape is formed at an upper side surface of the inner stator, and an extension protrusion having a ring shape protrudes from a frame of the frame unit contacting an upper side surface of the inner stator, wherein the extension protrusion is inserted into the welding groove so as to support the inner stator, and the inner stator and the frame contacting the inner stator are fixedly coupled by welding.