| 摘要 |
<p>The rotary shaft (5, 42, 63, 84) of a hydraulic pump (1, 41, 61, 81, 85) that is this hydraulic rotary machine is coupled to a drive source coupling (20, 44, 92) using a spline coupler (23, 47). The rotary shaft (5, 42, 63, 84) is provided with: an oil supply pathway (24, 48, 77) that supplies hydraulic oil inside a casing (2, 62, 82) as lubricating oil to the spline coupler (23, 47); and an oil return pathway (25, 49, 78) that recovers and returns into the casing (2, 62, 82) the lubricating oil that had been supplied to the spline coupler (23, 47) by the oil supply pathway (24, 48, 77). Between the coupling (20, 44, 92) and the rotary shaft (5, 42, 63, 84) is provided a seal member (28, 52) that prevents lubricating oil supplied to the spline coupler (23, 47) from leaking to the outside.</p> |
