초록 ▼

A fuel pump wherein the inner cylinder 37 for forming the fuel duct 38, in the outer cylinder 14, is provided between the stator 34 and the rotor 32 of the brushless motor 12, one end portion of the inner cylinder 37 is blockaded by the holder plate 41. The contacting pipe 44 for connecting from the

A fuel pump wherein the inner cylinder 37 for forming the fuel duct 38, in the outer cylinder 14, is provided between the stator 34 and the rotor 32 of the brushless motor 12, one end portion of the inner cylinder 37 is blockaded by the holder plate 41. The contacting pipe 44 for connecting from the fuel duct 38 to the delivery duct 21 is protrudely provided at the holder plate 41, and the control circuit unit 13 of the brushless motor 12 is held thereon. A resin sealed portion 52 is formed between the outer cylinder 14 and the inner cylinder 37, and the circumference of the control circuit unit 13 in the inner cylinder 37 by a potting method. The fuel 54 is lead from the introductory duct 16 to the fuel duct 38 of the inner cylinder 37, and is delivered from the delivery duct 21 through the insides of the fuel duct 38 and the contacting pipe 44. Since the fuel 54 does not contact on the resin sealed portion 52 and the control circuit unit 13, it is possible to prevent electric corrosion, conduction and a short of the resin sealed portion 52 and the control circuit unit 13 by the fuel 54.

대표청구항 ▼

A fuel feed pump wherein a housing, a pump in a housing, a brushless motor for driving the pump, a control circuit unit for controlling the brushless motor are assembled, a fuel duct is formed on the inside of the housing, a fuel is lead from an introductory duct which is opened at one end portion o

A fuel feed pump wherein a housing, a pump in a housing, a brushless motor for driving the pump, a control circuit unit for controlling the brushless motor are assembled, a fuel duct is formed on the inside of the housing, a fuel is lead from an introductory duct which is opened at one end portion of the housing to the fuel duct, and is delivered from a delivery duct which is opened at the other end portion of the housing; the fuel feed pump comprising: an inner cylinder, which is provided between a stator and the rotor of the brushless motor, the fuel duct is formed by a space therein; a holder plate, which is provided at one end portion of the inner cylinder, which is blockaded thereby and the control circuit unit is held thereon; a contacting pipe for a constructing duct, which is provided at the holder plate, the fuel duct of the inner cylinder and the delivery duct are connected to each other by the constructing duct; a resin sealed portion, which is formed in an outside space of the inner cylinder and the circumference of the control circuit unit in the housing by a potting resin.