Oil Pump Assembly Arrangement in Cooling Compressor

Abstract

The present application relates to an oil pump assembly arrangement for cooling compressors. Such invention aims to provide said compressor with a better use of the inner space defined by the housing thereof, in order to allow its miniaturization. To this end, it is proposed that fastening rod, which is able to anchor pin of the oil pump in a fixed portion of electric engine, is supported, in the median portion thereof, in a hole provided next to pin and, in the ends thereof, in respective cribs defined in a fixed portion of electric engine, wherein the housing in these cribs takes place by inner sides thereof and, still, wherein fastening rod extends through free spaces defined between coils, guaranteeing the minimum electrical distances required by rules.

1 . Oil pump assembly arrangement in cooling compressor, which comprises a housing within which it is arranged an electric engine which includes a stator carrying a plurality of coils circumferentially spaced apart from each other and a rotor associated to a driving shaft and a pin internally and concentrically arranged with respect to said driving shaft;
 driving shaft cooperating with pin, so as to define helical channels which delineate the lubricating oil path, when it is pumped due to the relative revolution between driving shaft and pin; and   a fastening rod able to anchor said pin in a fixed portion of electric engine;   wherein said assembly rod is supported, in the median portion thereof, to pin and, in the ends thereof, in respective cribs defined in fixed portion of electric engine;   said assembly arrangement characterized by the fact that:   fastening rod extends through free spaces longitudinally aligned with gaps defined between adjacent coils; and   ends of fastening rod are housed in cribs by the inner sides thereof.   
     
     
         2 . Oil pump assembly arrangement in cooling compressor according to  claim 1 , characterized by the fact that cribs are defined by projections, diametrically opposite to each other, extending radially outwardly from an outer surface of a protective cover of electric engine. 
     
     
         3 . Oil pump assembly arrangement in cooling compressor according to  claim 2 , characterized by the fact that the length of fastening rod is entirely arranged within the circumference defined by protective cover and the projections thereof. 
     
     
         4 . Oil pump assembly arrangement in cooling compressor according to  claim 2 , characterized by the fact that protective cover is polymeric and manufactured by injection molding. 
     
     
         5 . Oil pump assembly arrangement in cooling compressor according to  claim 2 , characterized by the fact that projections are formed from at least two adjacent and opposite half-rounds.