摘要 |
An earthmoving scraper of the type having a bowl assembly including a cutting edge fixed on the forward end thereof, the bowl assembly being defined by a pair of side walls, an ejector forming a rear wall, and a bowl floor rearwardly of the cutting edge, the bowl floor being slidable to a rearward position relative to the side walls to expose a material ejection opening. To facilitate control of the depth of spread or fill during material unloading, a strike-off blade is pivotally supported on the slidable floor, the strike-off blade being adapted to be pivoted to a lower, operational position when the floor is moved to a rearward or unloading position. Cam and stop means operatively associated with the strike-off blade and the side walls, are provided for moving the strike-off blade to an upper position when the floor is in a forward position wherein the strike-off blade forms a load-supporting extension of the floor. In this environment, the present invention provides lock means for locking the strike-off blade in the upper position thereby circumventing accidental loss of payload as might be occasioned by undesired downward pivotal movement of the strike-off blade caused by the payload weight thereon, or by shock loads.
|