| 摘要 |
The present invention relates to a hydraulic pump. A hydraulic pump according to an embodiment of the present invention includes: a driving shaft; a swash plate adjusting a discharge amount of a fluid according to an inclination while covering the driving shaft; a swash plate piston elastically pressing one side of the swash plate to allow the swash plate to be inclined with respect to the driving shaft; an adjusting piston pressing the other side of the swash plate to allow the inclination of the swash plate to be near to a direction vertical to the driving shaft when receiving an operational fluid pressure; a cylinder block rotating with the driving shaft and including multiple hydraulic pistons reciprocated by the swash plate therein; a valve plate coming into contact with the cylinder block to be able to slide and including a discharge port and an intake port connected to the hydraulic piston; a first supply passage supplying the operational fluid pressure to the adjusting piston; a regulator including a spool opening the first supply passage when the fluid pressure discharged to the discharge port is increased to a preset pressure or at a higher pressure in closing the first supply passage; a pressure control piston connected to one end of the spool and pressing the spool in a direction opening the first supply passage when the operational fluid pressure is received; a second supply passage supplying the operational fluid pressure to the pressure control piston; and a solenoid valve opening and closing the second supply passage. The purpose of the present invention is to provide a hydraulic pump capable of improving energy efficiency and preventing vibration, noise, and heat generation. |
