| 摘要 |
A tractor scraper suspension system having a tractor drive wheel axle frame pivotally connected to a tractor main frame to permit vertical movement of the tractor drive wheels relative to the tractor. A first pair of hydraulic cylinders is coupled between the tractor drive wheel axle frame and the tractor main frame to control and dampen such vertical bounce movement. A pair of arms extends transversely of an axis extending longitudinally of the tractor scraper and are included in a hitch assembly and operatively connected to the tractor drive wheel axle frame through a second pair of hydraulic cylinders for supplementing the first pair of hydraulic cylinders in controlling the vertical movement between the tractor drive wheels and to dampen tilting or rolling motion between the tractor portion and the trailer portion about their common longitudinally extending axis. A pressurized hydraulic system including accumulators, a source of fluid pressure, fluid control valves and restrictor orifices are coupled in fluid communication with the pairs of hydraulic cylinders to thereby improve the riding characteristics of the tractor scraper when encountering bounce, pitch or rolling conditions. |
