Single-shaft electro-hydraulic steering pump

The invention discloses a single-shaft electro-hydraulic steering pump which comprises a hydraulic pump and a motor, wherein a pump body of the hydraulic pump is fixedly mounted on a motor shell of the motor; an impeller of the hydraulic pump and a rotor of the motor are both mounted on a transmission shaft; the pump body comprises an impeller cavity and an end cover; the end cover is arranged on the end surface of the motor side of the impeller cavity, and combined with such end surface into a whole; a bearing cavity is formed in the center of the end cover; a convex ring is arranged at the bottom of the bearing cavity; a noise-reducing layer is arranged on the inner wall, facing the motor side, of the end cover, and made of a composite noise-reducing material; a bearing is mounted at the middle part of the transmission and in the bearing cavity of the pump body in a matched manner; and a wave spring is arranged between the convex ring and the end surface of the sealing bearing. In order to overcome defects