Box blade

A box blade grading attachment for a construction machine, comprising:

• an attachment frame including an upper attachment frame portion and a rear attachment frame portion, the upper attachment frame portion having a frame length extending forward from the rear attachment frame portion, the upper attachment frame portion having an upward facing reference surface extending along a majority of the frame length;
• a coupler bracket including an attachment interface for coupling of the box blade grading attachment to the construction machine;
• a tilt connection between the coupler bracket and the rear attachment frame portion, the tilt connection defining a tilt axis about which the attachment frame may tilt relative to the coupler bracket, the tilt axis being substantially parallel to the upward facing reference surface;
• a pivot beam extending transversely to the frame length and pivotally connected to the upper attachment frame portion such that the pivot beam is pivotable about a pivot beam pivot axis relative to the upper attachment frame portion;
• left and right caster wheels pivotally connected to the pivot beam on opposite sides of the pivot beam pivot axis, each of the caster wheels being pivotable about an upwardly extending caster axis relative to the pivot beam;
• a grading box extending transversely to the frame length;
• a parallelogram linkage connected between the grading box and the attachment frame;
• at least one lifting actuator arranged to raise and lower the parallelogram linkage and the grading box relative to the attachment frame;
• and
• at least one tilting actuator connected between the attachment frame and the coupler bracket for tilting the attachment frame and the grading box about the tilt axis relative to the coupler bracket.