Electric vacuum pump

Abstract

An electric vacuum pump includes: a motor part and a pump part placed in a case, and a cover member closing the case from a pump part side. The cover member includes: a suction port for sucking a fluid from pump outside into the pump part; a silencer part including a space part communicating with a discharge outlet of the pump part; and a discharge port for discharging a fluid ejected from the pump part to pump outside. The suction port has an end portion placed in sealingly contact with the pump part to hermetically communicate with a suction inlet of the pump part. The discharge port is formed with a throat part.

1 . An electric vacuum pump including: a resin case having internal space; a motor part placed in the internal space of the case, a pump part placed in the internal space of the case and arranged to drive in sync with the motor part, and a cover member closing the internal space of the case from a pump part side,
 wherein the cover member includes:
 a suction port for sucking a fluid from outside of the pump into the pump part; 
 a silencer part including a space part communicating with a discharge outlet of the pump part; and 
 a discharge port for discharging a fluid ejected from the pump part to outside of the pump, 
   the suction port has an end placed in sealingly contact with the pump part to hermetically communicate with a suction inlet of the pump part, and   the discharge port is formed with a throat part.   
     
     
         2 . The electric vacuum pump according to  claim 1 , wherein the suction port and the discharge port are arranged in a project plane of the electric vacuum pump in an axial direction of the electric vacuum pump. 
     
     
         3 . The electric vacuum pump according to  claim 1 , wherein the cover member is made of resin by integral molding. 
     
     
         4 . The electric vacuum pump according to  claim 1 , wherein the suction port, the discharge port, and the throat part are made together with the cover member by integral molding. 
     
     
         5 . The electric vacuum pump according to  claim 1 , wherein the suction port and the discharge port are placed on one end in an axial direction of the electric vacuum pump so that open ends of the suction port and the discharge port face in the same direction.