| 摘要 |
PURPOSE:To effect a swift control in a high speed by a method wherein a force motor is arranged orthogonally to the revolving shaft of a pump, the center of a bobbin for the force motor is opposed to an orifice to generate oil having a variable pressure and the swash plate of the pump is operated by the pressurized oil. CONSTITUTION:A main shaft 1, driven by a motor, rotates a rotor 5 through a spline coupling. The swash plate 9, varying the capacity of the pump, is inclined by an actuator 11 through a flange 13 and a pin 12. Both sides operating chambers of the actuator 11 are connected to the force motor 18 through paths 25A, 25B and when an electric current is impressed to the coil 19A of the bobbin of the force motor 18, the bobbin 19 moves to the direction of the main shaft 1 to control back pressures PA, PB. The controlled back pressures PA, PB act on the actuator 11 to change the slant angle of the swash plate 9. |
