| 摘要 |
PURPOSE:To improve accuracy of output control with a simple structure in two pump units which are integratedly rotated by a single power supply by respectively arranging a pilot pump and the like as a common member, and regulator pistons and the like as individual members. CONSTITUTION:Two pump units 1A, 1B which rotate integratedly are controlled by an engine 20 which is a single power supply. In this case, a rocker arm 7 which swings around a rocking shaft 8, a first valve 11 which is opened/closed according to rocking, and a pilot pump 31 which rotates integratedly with both pump units 1A, 1B are set as common members. On the other hand, for every one of both pump units 1A, 1B, regulator pistons 4A, 4B for changing the slant rotating angle of swash plates 32A, 32B, oil chambers 6A, 6B for supplying displacement pressure to the regulator pistons 4A, 4B, second valves 12A, 12B for switching either pump unit discharging pressure or a tank to be connected to the oil chambers 6A, 6B, and pistons 9A, 9B for push-pressing the rocker arm 7 are arranged respectively. |
