| 摘要 |
<p>A plurality of chambers (18 and 19) whose capacities are increased and reduced by the reciprocal motions of pistons (16 and 17) are provided. A cylinder block (5) which is provided in a housing (3) and is rotatable together with a shaft (4) along a valve plate (8) and whose rotation causes the respective pistons to perform contraction motions from the top dead centers to the bottom dead centers and perform expansion motions from the bottom dead centers to the top dead centers, a 1st kidney port (30) and a 4th kidney port (41) which are provided in the valve plate (8) in a region on one of the sides (left or right) of the straight line (X) connecting the top dead center and the bottom dead center and a 3rd kidney port (40) and a 2nd kidney port (31) which are provided in the valve plate (8) in a region on the other side (right or left ) of the straight line (X) are included in a hydraulic pump/motor apparatus. Some of the chambers are successively made to communicate with the 1st kidney port and the 2nd kidney port by the rotation of the cylinder block to constitute a 1st pump/motor of the hydraulic pump/motor and the other of the chambers are successively made to communicate with the 3rd kidney port and the 4th kideny port by the rotation of the cylinder block to constitute a 2nd pump/motor.</p> |
