Opposing swash plate piston pump/motor

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, 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 cylinder, the piston pump/motor comprising:

• 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, comprising:
• a slide bar supported to be capable of displacing in only an orthogonal direction to a plane formed by the rotary central axis of the cylinder block, the tilt central axis of the first swash plate, and the tilt central axis of the second swash plate;
• a first engagement pin that engages the first swash plate with the slide bar to be capable of rocking;
• and
• a second engagement pin that engages the second swash plate with the slide bar to be capable of rocking.