HYDRAULIC MACHINE

PROBLEM TO BE SOLVED: To provide a hydraulic machine with improved output.SOLUTION: The hydraulic machine comprises: a cam including a cam body that rotates about an axis and has a circular cross section with the axis as a center, and a plurality of concave and convex parts formed on an outer peripheral surface of the cam body; a ring part provided on the side of an outer periphery of the cam, and including an inner periphery contact surface that has a circular cross section when viewed from a direction of the axis; a plurality of rollers in contact with the inner periphery contact surface and an outer peripheral surface of the cam; and at least one piston attached to the ring part to move forward and backward in a radial direction of the axis.SELECTED DRAWING: Figure 1 【課題】出力の向上した油圧機械を提供する。【解決手段】油圧機械は、軸線回りに回転するとともに、該軸線を中心とする円形断面を有するカム本体、及び該カム本体の外周面に形成された複数の凹凸を有するカムと、前記カムの外周側に設けられ、前記軸線方向から見て断面円形の内周当接面を有するリング部と、前記内周当接面及び前記カムの外周面に当接する複数のローラと、前記リング部に取り付けられて、前記軸線の径方向に進退動する少なくとも１つのピストンと、を備える。【選択図】図１