| 摘要 |
PURPOSE:To improve working efficiency by arbitrarily setting the distribution of power in an actuator driven by a hydraulic pump, in two variable capacity type hydraulic pumps driven by a motor. CONSTITUTION:Onto the control members 6a and 6b for controlling each tilt angle of hydraulic pumps 3a and 3b, the discharge pressure of the own hydraulic pump and the discharge pressure of other hydraulic pumps through variable pressure reducing valves 12a and 12b act. The pistons 16a and 16b are connected to the springs 15a and 15b of the variable pressure reducing valves 12a and 12b, respectively, and each set pressure of the springs can be varied by applying each hydraulic pressure onto the piston 16a and 16b. Further, the discharge pressure for applying onto the control members 6a and 6b can be varied by switching the hydraulic pressure for applying onto the pistons 16a and 16b, by a selector valve 13. |
