Patent ID: 11879452
Assignee: KYB CORPORATION
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 2:
3. A pump displacement control device for controlling a displacement of a pump, the pump displacement control device comprising:
a servo piston configured to change a tilt angle of the pump;
a flow rate control spool configured to be displaced corresponding to an input pressure;
a power control spool configured to be displaced corresponding to a discharge pressure of the pump;
a control pressure regulating spool configured to regulate a control pressure which controls the servo piston in accordance with an amount of displacement of the flow rate control spool or an amount of displacement of the power control spool; and
a feedback lever connected to the servo piston and the control pressure regulating spool, the feedback lever being configured to feedback an amount of displacement of the servo piston to the control pressure regulating spool, wherein
the feedback lever is configured to directly abut on either one of the flow rate control spool or the power control spool for regulating the control pressure,
the feedback lever has:
a first contact portion configured to abut on a stepped portion of the flow rate control spool; and
a second contact portion disposed on a side opposite to the first contact portion,

the second contact portion configured to abut on a stepped portion of the power control spool, and
the flow rate control spool and the power control spool are disposed such that the flow rate control spool and the power control spool are each disposed parallel to the servo piston and face each other with the feedback lever sandwiched between the flow rate control spool and the power control spool.