Patent ID: 8235681

Claim:
An opposing swash plate piston pump/motor in which a first swash plate and a second swash plate are disposed on either side of a cylinder block, a plurality of cylinders are disposed in the cylinder block on a circumference centering on a central axis of the cylinder block and parallel to the central axis of the cylinder block, a first piston and a second piston are inserted opposite to each other in each cylinder wherein the first piston slides on the first swash plate and the second piston slides on the second swash plate such that the first piston and the second piston enlarge and reduce the respective cylinder, the piston pump/motor comprising: a case housing the cylinder block, the first swash plate, and the second swash plate; a servo mechanism that tilts the first swash plate; and a tilt linking mechanism that tilts the second swash plate in conjunction with tilting of the first swash plate, wherein the tilt linking mechanism includes a support pin fixed to the case, and a rocking link, that is supported by the support pin to be free to rock, which transmits the tilting of the first swash plate to the second swash plate, wherein the first swash plate includes a first engagement pin parallel to a tilt central axis of the first swash plate, the second swash plate includes a second engagement pin parallel to a tilt central axis of the second swash plate, and the rocking link engages with the first swash plate via a notch that holds the first engagement pin to be capable of displacing in an axial direction of the rocking link relative thereto, and engages with the second swash plate via a notch that holds the second engagement pin to be capable of displacing in the axial direction of the rocking link relative thereto.