| 摘要 |
PROBLEM TO BE SOLVED: To provide a hydraulic circuit for a working vehicle which can inhibit the fluctuation of traveling speed even when a load pressure of a working hydraulic actuator varies.SOLUTION: The hydraulic circuit for a working vehicle includes a first hydraulic pump 21 and a second hydraulic pump 22 of a variable capacity type, a left traveling hydraulic motor 5L, a right traveling hydraulic motor 5R, a working hydraulic actuator, a traveling directional control valve, a working directional control valve, a pilot pump 25, a pressure compensation valve which compensates the front and rear differential pressures of the traveling directional control valve and the working directional control valve to predetermined values, a flow rate control means which changes the flow rate of the first hydraulic pump 21 and the second hydraulic pump 22, a traveling junction valve 31, and a flow rate limiting means 100 which regulates the amount of spool strokes of the working directional control valve and limits the flow rate of hydraulic fluid supplied to the working hydraulic actuator from the traveling junction valve 31 through the working directional control valve when the hydraulic fluid is supplied to the traveling hydraulic motors 5L, 5R. |
