Patent ID: 8827662

Claim:
A refrigeration compressor which comprises a shell containing lubricant oil and carrying a cylinder block journalling a crankshaft; an electric motor having a stator affixed to the cylinder block and a rotor mounted around the crankshaft; and an oil pump coupled to the crankshaft and having; a tubular sleeve having an upper tubular portion affixed to one of the parts of the crankshaft and the rotor; a pump body disposed in the interior of the tubular sleeve and having a lower end portion carried by an assembly defined by the cylinder block and stator, so as to be freely displaced in the interior of the tubular sleeve in radial directions orthogonal to the rotation axis of the rotor and rotatively locked in relation to the rotor; a fixation rod having an upper portion mounted to one of the parts of the cylinder block and the stator, and a lower portion around which a lower end portion of the pump body is axially retained and slidably mounted, according to a direction orthogonal and coplanar to the rotation axis of the rotor, characterized in that the upper portion of the fixation rod is mounted to one of the parts of the cylinder block and stator in a manner that allows rotational movement of the fixation rod around an articulation axis which is orthogonal and coplanar to the rotation axis of the rotor, and that the pump body is provided with a through hole, the lower portion of the fixation rod being mounted through the through hole with a reduced radial gap and being angularly and freely displaced according to a direction orthogonal to said articulation axis.