| 摘要 |
PURPOSE:To enable to perform properly hydraulic control regardless of carrying load even when the car height is adjusted by a method wherein the lever ratio of a load sensing lever is changed by rocking the supporting arm of a load sensing lever by means of an air cylinder, which communicates with the height- control element. CONSTITUTION:A proportioning valve 26 is connected by the load sensing lever 34 to an unspringing member 56 and serves for hydraulically controlling in response to the load. The load sensing lever 34 is supported by a supporting arm 38 and, because of being equipped with a slide fitting 64, the lever ratio of l1/ l2 can be changed. The height-controlling element 76 heightens the car height by introducing the air pressure in a controller 94. The air cylinder 42 communicated to the level-control element 76 rocks the supporting arm 38, resulting in changing the lever ratio in response to the height controlling. Accordingly, the properly hydraulically controlling is possible regardless of carrying load. |
