| 摘要 |
PROBLEM TO BE SOLVED: To provide a hydraulic transmission which enables a jet pump to be provided without increasing the number of components in a hydraulic circuit and inhibits energy loss relating to a pressure control valve.SOLUTION: The invention includes: a main hydraulic pump 2; a pilot pump 3; a hydraulic actuator 5; a directional control valve 6; a suction circuit which supplies an oil suctioned by the main hydraulic pump 2; a pilot relief valve 8 which defines a discharge pressure of the pilot pump 3, and so on. A jet pump 10 is provided at the suction circuit. The jet pump 10 includes: a suction pipeline 11 which is connected with the main hydraulic pump 2 at one end; a first pipeline 12 which is connected with the pilot relief valve 8 at one end; a connection part 13 with which the other end of the suction pipeline 11 and the other end of the first pipeline 12 are connected; a second pipeline 14 where one end is connected with the connection part 13 and the other end is connected with a tank 4; and a nozzle 15 provided at a portion of the first pipeline 12 which is positioned near the connection part 13. |
