Water pump for vehicle

Abstract

Provided is an automotive water pump in which regions of a rotor chamber and a driver chamber are formed and a stator and a connector are implemented into an integral pump body by an insert molding method, to thus enhance a waterproof performance of the water pump and enhance an assembly through simplification of an assembly structure. The automotive water pump includes: a pump body in which a stator and a connector are molded in an integral structure, and a partial structure of an upper-end rotor chamber and a lower-end driver chamber is independently formed; a rotating assembly that is accommodated and combined in the rotor chamber, and that pressurizes and discharges a coolant that flows in from the outside by rotation of an impeller that is combined on top of a rotating axis according to rotation of the rotating axis to which a rotor facing the stator is fixed; and a driver cover that covers the driver chamber combined with a driver including the connector.

1 . An automotive water pump comprising:
 a pump body in which a stator and a connector are molded in an integral structure, and a space for a rotor chamber and a space for a driver chamber are provided on top and bottom portions of the pump body, respectively;   a rotating assembly that is accommodated and combined in the rotor chamber, and that pressurizes and discharges a coolant that flows in from the outside by rotation of an impeller that is combined on top of a rotating axis according to rotation of the rotating axis to which a rotor is fixed; and   a driver cover that covers the driver chamber.   
     
     
         2 . The automotive water pump according to  claim 1 , further comprising a pump cover that comprises a volute chamber that is directly coupled to the pump body to thus guide a flow of the coolant, and that pressurizes the coolant by rotation of the impeller. 
     
     
         3 . The automotive water pump according to  claim 2 , wherein the pump cover is inserted into the inside of an engine block. 
     
     
         4 . The automotive water pump according to  claim 3 , wherein the engine block comprises the volute chamber that is directly coupled to the pump body to thus guide a flow of the coolant, and that pressurizes the coolant by rotation of the impeller. 
     
     
         5 . The automotive water pump according to  claim 1 , wherein the pump body is molded by using a single material of polyphenylene sulfide (PPS) or bulk molding compound (BMC), with an insert molding method. 
     
     
         6 . The automotive water pump according to  claim 5 , wherein the rotor primarily fixes a back yoke and a permanent magnet by a rotor cover, and then secondarily surrounds and fixes the back yoke and an outer circumferential surface of the back yoke by insert molding the BMC. 
     
     
         7 . The automotive water pump according to  claim 5 , wherein bearings are inserted into and combined with top and bottom portions of the rotating assembly when the rotating assembly are coupled with the rotor chamber. 
     
     
         8 . The automotive water pump according to  claim 1 , wherein the stator comprises a stator core and a portion of the stator core is exposed to the outside of the pump body. 
     
     
         9 . The automotive water pump according to  claim 8 , wherein the stator core comprises a fastening hole passing through a portion of the stator core exposed to the outside of the pump body; to thus be coupled directly to the engine block. 
     
     
         10 . The automotive water pump according to  claim 9 , wherein the engine block comprises the volute chamber that guides a flow of the coolant, and that pressurizes the coolant by rotation of the impeller. 
     
     
         11 . The automotive water pump according to  claim 8 , wherein the stator core comprises through-holes or outer circumferential grooves into which a molding material of polyphenylene sulfide (PPS) or bulk molding compound (BMC) is filled at the time of performing an insert molding method, to then be fixed to the pump body.