OPPOSED SWASH PLATE TYPE FLUID PRESSURE ROTATING MACHINE
An opposed swash plate type fluid pressure rotating machine in which a first piston and a second piston projecting from opposite ends of a rotary cylinder block reciprocate in a cylinder, respectively following a first swash plate and a second swash plate includes a first tilt bearing for tiltably supporting the first swash plate, a first tilt driving piston for tilting the first swash plate in a direction intersecting with an axis of rotation of the cylinder block, a second tilt bearing for tiltably supporting the second swash plate, and a second tilt driving piston for tilting the second swash plate in a direction intersecting with the axis of rotation of the cylinder block.
1 . An opposed swash plate type fluid pressure rotating machine in which a first piston and a second piston projecting from opposite ends of a rotary cylinder block reciprocate in a cylinder, respectively following a first swash plate and a second swash plate, comprising:
a first tilt bearing for tiltably supporting the first swash plate;
a first tilt driving piston for tilting the first swash plate in a direction intersecting with an axis of rotation of the cylinder block;
a second tilt bearing for tiltably supporting the second swash plate; and
a second tilt driving piston for tilting the second swash plate in a direction intersecting with the axis of rotation of the cylinder block.
2 . The opposed swash plate type fluid pressure rotating machine according to claim 1 , comprising:
a first push-side piston pressure chamber and a first pull-side piston pressure chamber defined on opposite ends of the first tilt driving piston;
a first tilt control valve for switching the flow of working fluid supplied to and discharged from the first push-side piston pressure chamber and the first pull-side piston pressure chamber from and to a high-pressure selector valve;
a second push-side piston pressure chamber and a second pull-side piston pressure chamber defined on opposite ends of the second tilt driving piston; and
a second tilt control valve for switching the flow of working fluid supplied to and discharged from the second push-side piston pressure chamber and the first pull-side piston pressure chamber from and to the high-pressure selector valve.
3 . The opposed swash plate type fluid pressure rotating machine according to claim 1 , comprising:
a first translating mechanism for translating a linear movement of the first tilt driving piston into a rotational movement of the first swash plate; and
a second translating mechanism for translating a linear movement of the second tilt driving piston into a rotational movement of the second swash plate.
4 . The opposed swash plate type fluid pressure rotating machine according to claim 3 , wherein:
the first translating mechanism includes a first guide groove formed on the first tilt driving piston and a first pin member provided on the first swash plate and movable in the first guide groove; and
the second translating mechanism includes a second guide groove formed on the second tilt driving piston and a second pin member provided on the second swash plate and movable in the second guide groove.