Hydraulic pump shell and machine core using same

The hydraulic pump shell comprises a double-layer shell, a closed cavity, reinforcing ribs, an oil inlet, an oil discharge port, a receding groove and a mounting cover plate, the closed cavity is formed in the middle of an inner cavity of the double-layer shell, the receding groove is formed in the tail end of the interior of the double-layer shell, the closed cavity is formed in the middle of the inner cavity of the double-layer shell, and the reinforcing ribs are arranged in the closed cavity. The closed cavity is provided with an inclined end face, the inclination angle of the inclined end face is 16 degrees, and the diameter of the receding groove is larger than or equal to 75 mm. The closed cavity is provided with a mounting cover plate, the mounting cover plate is provided with an oil inlet and an oil discharge port, the clearance groove is provided with an output through hole, and the output through hole is communicated with the oil inlet; reinforcing ribs are arranged on the inner wall of the double-l