| 摘要 |
<p>PURPOSE:To prevent the generation of torque fluctuation by disposing the coupling positions of piston rods against an oscillating swash plate unequally such as to be shifted from the positions of equal spacing toward specific zones which are the troughs of torque fluctuation. CONSTITUTION:The coupling positions of remaining piston rods 12b-12e excluding a piston rod 12a against an oscillating swash plate 9 are shifted from the positions of equal spacing, and this shifting direction directs an angle position thetax from the coupling position to the rotating position of the rod 12a. Due to this shifting from the position of equal spacing, the top dead center time of pistons in cylinder bores 1b-1e is shifted toward the turning angle position thetax, and the local peaks of torque fluctuation corresponding to the respective cylinder bores 1b-1e are shifted toward the turning angle position thetax. The big troughs of the torque fluctuation in one cycle are prevented from generating owing to the averaged torque fluctuation, which results in preventing noise, vibration and rattling as well as the fatigue failure of an axis of rotation 4.</p> |
