| 摘要 |
<p>Provided is an axial piston hydraulic rotating machine wherein the stability of a piston shoe is high. A circular internal static pressure pocket (23) which communicates with a fill opening (9A), an inner peripheral land portion (22) formed on the outer periphery of the internal static pressure pocket (23), an external static pressure pocket (24) formed on the outer periphery of the inner peripheral land portion (22), and an outer peripheral land portion (25) formed on the outer periphery of the external static pressure pocket (24), are formed on the surface of a piston shoe (9) that slides on a swash plate (10). The inner peripheral land portion (22) is annularly formed around the fill opening (9A). Oil passing grooves (27) through which the internal static pressure pocket (23) communicates with the external static pressure pocket (24), are formed in parts of the inner peripheral land portion (22), on straight lines passing through the center of the fill opening (9A). The oil passing grooves (27) are inclined with respect to the straight line A-B passing through the center of the fill opening (9A). The inner wall surface and the outer wall surface of the inner peripheral land portion (22) are disposed on straight lines connecting the center of the fill opening (9A) to the centers of the oil passing grooves (27).</p> |
