| 摘要 |
PURPOSE:To suppress a decrease of effective difference pressure between a flow inlet and outlet of an hydraulic motor without causing the increase of a flow of oil, by obtaining a slow differential lock effect. CONSTITUTION:There are constituted the first parallel circuit, for connecting each hydraulic motor 1, 2 directly to an hydraulic pump 5 respectively by both oil passages 3, 4 and the first selective positionIof a selector valve 6, and the second parallel circuit, for connecting each oil hydraulic motor 1, 2 to the hydraulic pump 5 respectively through throttle valves 7, 8 by the second selective position II of the selector valve 6 and the both oil passages 3, 4. A selecting mechanism is provided with such a function that the selector valve 6 is held to the selective positionIat conduction while the selector valve 6 is intermittently switched to the selective position II at high speed when a differential lock is necessary. |
