| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve self priming performance and pump efficiency of a swash plate type piston pump. SOLUTION: Wedge-shaped cutout parts 38, 35, 36, 37 are provided for reducing fluctuation of oil pressure in a suction port 31 and first to third delivery ports 32 to 34 formed in a valve plate 3. IN an opening end of a cylinder port 22 of a second port group corresponding to the second delivery port 33, an R-shaped part 22a for suppressing separation of an operating fluid is provided in a rotational direction front side of a cylinder block 2 and in a position deviated in a diametric direction relative to the rotational axial center X so as to avoid interference. A width in a radius direction of the second delivery port 33 is formed smaller as compared with the cylinder port 22, and the R-shaped part 22a is arranged so as to avoid interfering with the second delivery port 33 itself.</p> |
