| 摘要 |
<p>An integrated electric motor driven inline hydraulic apparatus comprising a housing (10), an electric motor having a stator fixed (11) to the housing and a rotor (12) surrounded by the stator. A positive displacement hydraulic pump comprises a cylinder block (13) supported on bearings (14, 14a) in the housing (10) and includes a plurality of circumferentially spaced through bores (15) in the cylinder block (13). Pairs of opposing pistons (16, 17) reciprocate in each cylinder bore (15), the pistons extending from the cylinder block (13) to cooperate with inclined surfaces (18) which induce reciprocation of the pistons with cylinder block rotation. A valve (21) is adapted to alternately connect the chambers between the opposing sets of piston (16, 17) with a fluid inlet and fluid outlet during cylinder block rotation. The housing (10) has a hydraulic fluid inlet (39) adjacent one end thereof such that hydraulic fluid from the inlet flows over the stator (11), through the air gap (45) between the stator and rotor (12) and over the rotor. The pump has an inlet (25, 26, 27) such that hydraulic fluid therefor flows to the inlet of the pump, and an outlet (32) of hydraulic fluid from the pump to the hydraulic system supplied by the pump. <IMAGE></p> |
