Fluid pump, motor vehicle, use and production method

Abstract

A fluid pump for a motor vehicle, having a housing, an impeller for conveying a fluid through a fluid chamber of the housing, an electric motor with a stator inside a stator space of the housing for driving an electric motor rotor coupled to the impeller, and a containment shell which separates a wet space of the fluid pump from a dry space of the fluid pump. The containment shell joined to the stator is arranged at least elastically compressed between two fastened together housing parts and rests against the stator and a pump stage housing portion, and the containment shell braces the stator against the housing and thereby fixes the stator relative to the housing in the longitudinal direction of the fluid pump.

What is claimed is: 
     
         1 . A fluid pump for a motor vehicle, comprising:
 a housing having at least two housing parts fastened together, one of the at least two housing parts further comprising:
 a pump stage housing portion; 
   an impeller for conveying a fluid through a fluid space of the housing;   an electric motor further comprising a stator inside a stator space of the housing for driving an electric motor rotor coupled to the impeller; and   a containment shell which separates a wet space of the fluid pump from a dry space of the fluid pump;   wherein the containment shell joined to the stator is arranged at least elastically compressed between the at least two fastened together housing parts and rests against the stator and the pump stage housing portion, wherein the containment shell braces the stator against the housing and thereby fixes the stator relative to the housing in the longitudinal direction of the fluid pump.   
     
     
         2 . The fluid pump of  claim 1 , wherein the containment shell is joined to the stator forming a press fit. 
     
     
         3 . The fluid pump of  claim 1 , wherein the containment shell is joined to the stator with play. 
     
     
         4 . The fluid pump of any of  claim 1 , further comprising:
 a fastening region;   wherein in the fastening region, the at least two fastened together housing parts are spaced apart from one another in the longitudinal direction of the fluid pump.   
     
     
         5 . The fluid pump of  claim 1 , the containment shell further comprising:
 a compressed spring portion;   wherein the compressed spring portion is arranged between the stator and the pump stage housing portion in the longitudinal direction of the fluid pump and, resting against the stator and the pump stage housing portion, is bent relative to the stator and to the pump stage housing portion.   
     
     
         6 . The fluid pump of  claim 1 , the fluid pump further comprising a radial pump. 
     
     
         7 . A vehicle, comprising:
 a fluid pump, further comprising:
 a housing having at least two housing parts fastened together, one of the at least two housing parts further comprising: 
 a pump stage housing portion; 
 an impeller for conveying a fluid through a fluid space ( 8 ) of the housing; 
 an electric motor further comprising a stator inside a stator space of the housing for driving an electric motor rotor coupled to the impeller; and 
 a containment shell which separates a wet space of the fluid pump from a dry space of the fluid pump; 
 wherein the containment shell joined to the stator is arranged at least elastically compressed between the at least two fastened together housing parts and rests against the stator and the pump stage housing portion, wherein the containment shell braces the stator against the housing and thereby fixes the stator relative to the housing in the longitudinal direction of the fluid pump. 
   
     
     
         8 . A method for producing a fluid pump of any of  claim 1 , comprising the steps of:
 joining of the containment shell to the stator;   joining of the arrangement of containment shell and stator to the rotor and the housing; and   fastening together the at least two housing parts two housing parts such that the containment shell is at least elastically compressed between the at least two housing parts two housing parts and thus pressed against the stator and the pump stage housing portion, and the stator is braced against the housing by the containment shell and thereby fixed relative to the housing in the longitudinal direction of the fluid pump.