Abstract: Disclosed is an electric water pump including: a main body; a motor module including a rotor and a stator to generate a rotational force with power supplied from an outside; a pump module coupled to a first side of the main body, and including an impeller spinning by the rotational force of the motor module, an inlet to introduce a fluid as the impeller spins, and an outlet; a controller housing coupled to a second side of the main body and coupling with a controller for controlling the motor module; and a rotary shaft transmitting the rotational force from the motor module to the impeller, wherein the rotor is formed by performing insert injection-molding after stacking a rotor core and coupling with a magnet, and the rotary shaft is pressed into the rotor so that the rotor and the rotary shaft can be formed as a single body.

Abstract: Disclosed is a hydraulic power steering pump including a wet type motor with an open type magnet, the hydraulic power steering pump including: a housing; a gear pump module supported at one side of the housing and pressurizing a fluid; and a motor module supported at the other side of the housing and providing driving force to the gear pump module, the motor module including a stator that is supported by the housing and receives electric current based on supplied power, and a rotor that includes a motor rotation shaft rotated by the stator and a permanent magnet generating magnetic force, and an outer side of the permanent magnet being supported by the motor rotation shaft to have an exposed portion exposed toward the stator.

Abstract: A power steering oil pump may include a pump housing, a rotor that is equipped with a plurality of vanes and coupled to the pump housing to rotate therein, a cam ring inserted between the rotor and the pump housing to form a pumping space between the cam ring and the rotor, a rotor shaft that passes through the rotor and is fitted therein to transmit rotational force to the rotor, and a bush that has at least a first oil groove on an inner circumference thereof and supports the rotor shaft to a pump cover coupled to the pump housing while covering a portion of the rotor shaft which passes through the rotor, wherein at least a second oil groove is formed on an end portion of the vanes contacting with an inner circumference of the cam ring.

Abstract: A power steering oil pump may include a pump housing, a rotor that is equipped with a plurality of vanes and coupled to the pump housing to rotate therein, a cam ring inserted between the rotor and the pump housing to form a pumping space between the cam ring and the rotor, a rotor shaft that passes through the rotor and is fitted therein to transmit rotational force to the rotor, and a bush that has at least a first oil groove on an inner circumference thereof and supports the rotor shaft to a pump cover coupled to the pump housing while covering a portion of the rotor shaft which passes through the rotor, wherein at least a second oil groove is formed on an end portion of the vanes contacting with an inner circumference of the cam ring.