| 摘要 |
PURPOSE:To prevent drop of the oil pressure of a rear power cylinder by connecting the discharge port of a front power cylinder to the rear power cylinder through an oil path changeover valve, and allowing a piston on the side where the oil is supplied to the rear power cylinder at the time of large steering angle, to block the input port of the oil chamber of the piston. CONSTITUTION:Oil chambers FL, FR of a front power cylinder 10 are provided with input ports 10a, 10b in connection to a control valve 2 through oil paths 42, 43 and discharge ports 10c, 10d in connection through oil paths 47, 48 to the oil chambers RL, RR of a rear power cylinder 15 wherein an oil path changeover valve 20 is interposed. Pistons 12, 13 of the front power cylinder 10 extrude the oil from the oil chambers FL, FR corresponding to the large steering angle operation, supply the oil pressure to the oil chamber RL or RR of the rear power cylinder 15, and block the input port 10a or 10b of the oil chamber FL or FR. |
