| 摘要 |
PURPOSE:To provide a hydraulic system for steering, capable of getting rid of any power loss in steering neutrality. CONSTITUTION:A hydraulic motor 4 is connected to a discharge pipeline 3 of a variable displacement hydraulic pump 1. Two branch pipelines 7A and 7B are connected to the point midway in this discharge pipeline 3 via a steering selector valve V1. Two chambers of a steering cylinder 8 are connected to both these branch pipelines. In addition, the selector valve V1 cuts of these pipelines 7A and 7B in steering neutrality, and it feeds the pipeline 7A or 7B with pressure oil only at the time of right or left turning operation. Moreover, during this turning operation, a throttle value of a variable throttle valve V2 is increased, and an amount of oil flowing into the hydraulic motor from the discharge pipeline 3 is checked, and the pressure oil is preferentially fed to the pipeline 7A or 7B. |
