Fuel pump

Abstract

Fuel pump ( 10 ) may comprise a housing ( 12 ), a motor ( 30 ) disposed within the housing, and a motor cover ( 16 ) attached to one end of the housing. The motor may include a motor shaft ( 32 ). The motor cover may comprise a bearing retaining portion ( 22 ) and a discharge port ( 26 ). The bearing retaining portion retains a bearing ( 28 ) that rotatably supports one end of the motor shaft. The discharge port may be formed concavely from the outer surface of the motor cover. A fuel pipe ( 50 ) is inserted into the discharge port. The bearing retaining portion may be formed in a center of the inner surface of the motor cover. The discharge port may be disposed in a position shifted from the bearing retaining portion.

1 . A fuel pump comprising: 
 a housing,    a motor disposed within the housing, the motor having a motor shaft, and    a motor cover attached to one end of the housing, the motor cover comprising a bearing retaining portion and a discharge port, wherein the bearing retaining portion retains a bearing that rotatably supports one end of the motor shaft, and the bearing retaining portion is formed in a center of the inner surface of the motor cover, wherein the discharge port is formed concavely from the outer surface of the motor cover and is designed to insert a fuel pipe, and wherein the discharge port is disposed in a position shifted from the bearing retaining portion.    
   
   
       2 . A fuel pump as in  claim 1 , wherein the motor comprises a commutator and a brush that comes into contact with the commutator, wherein the motor cover further comprises a brush retaining portion for retaining the brush, and wherein the brush retaining portion and the discharge port are arranged side by side in the circumferential direction, and the bearing retaining portion, discharge port, and brush retaining portion are arranged so as to overlap in the axial direction.  
   
   
       3 . A fuel pump as in  claim 2 , wherein walls according to at least one combination of the wall for forming the bearing retaining portion and the wall for forming the discharge port, the wall for forming the discharge port and the wall for forming the brush retaining portion, or the wall for forming the bearing retaining portion and the wall for forming the brush retaining portion, are shared.  
   
   
       4 . A fuel pump as in  claim 3 , wherein the motor cover further comprises a discharge hole which is formed in the bottom surface of the discharge port, and further comprising: 
 a return check valve disposed in the discharged port, the return check valve opening and closing the discharge hole, and wherein in a state where the fuel pipe is inserted into the discharge port, the return check valve is positioned on the outside of the fuel pipe.    
   
   
       5 . A fuel pump as in  claim 4 , further comprising a guide for guiding the return check valve, the guide being disposed in the discharge port.